Efficient Electro-Oxidation of 2-Propanol at Platinum- and Gold-Modified Palladium Nanocatalysts

Ayman, Kareem; Asal, Yaser M.; Mohammad, Ahmad M.; Al-Akraa, Islam M.

doi:https://doi.org/10.1155/2023/6674344

Journal of Chemistry

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Abstract Introduction Results and Discussion Conclusion Data Availability Disclosure Conflicts of Interest Authors’ Contributions References Copyright Related Articles

Research Article | Open Access

Volume 2023 | Article ID 6674344 | https://doi.org/10.1155/2023/6674344

Efficient Electro-Oxidation of 2-Propanol at Platinum- and Gold-Modified Palladium Nanocatalysts

Kareem Ayman,¹Yaser M. Asal,¹Ahmad M. Mohammad,²and Islam M. Al-Akraa¹

Academic Editor: Christophe Petit

Received01 Jun 2023

Revised05 Aug 2023

Accepted26 Oct 2023

Published03 Nov 2023

Abstract

This study aims at investigating the catalytic performance of Pd, Pd/Pt, and Pd/Au nanocatalysts toward the 2-propanol electro-oxidation reaction (2POR) in an alkaline medium. The catalyst components (Pd, Pt, and Au) were sequentially electrodeposited onto the glassy carbon (GC) electrode surface and further characterized using electrochemical (cyclic voltammetry (CV)) and materials (field-emission scanning electron microscopy (FE-SEM) coupled with energy-dispersive X-ray (EDX)) characterization methods. The Pd/Au/GC catalyst showed the highest catalytic activity in terms of the highest oxidation current (0.386 mA) and the highest stability in terms of the highest obtained current after 1800 s of continuous electrolysis. This behaviour was attributed to the enhancement in the charge transfer kinetics where the Pd/Au/GC catalysts acquired the lowest charge transfer resistance (R_ct, 1.85 kΩ) during the 2POR.

1. Introduction

The energy dilemma is undeniably one of the most pressing concerns confronting modern society, as it plays a critical role in global and domestic economic development and security [1, 2]. Due to the overwhelming increase in global population, coupled with the continuous economic growth seen in multiple developed and developing nations, an increase in global energy demand and consumption is unavoidable [3, 4]. To address these concerns, cost-effective, clean, and renewable energy sources that could be used as viable substitutes for fossil fuels are urgently needed [5–9]. Energy storage and conversion devices have received worldwide interest as a key step toward using renewable energy resources as primary energy sources, and it has become necessary to thoroughly examine the various promising energy conversion and storage solutions, such as fuel cells (FCs) [10–19], and embark on their implementation [3, 12]. In this regard, the direct alcohol fuel cells, such as the direct 2-propanol FCs (D2PFCs), appeared as excellent candidates [20–26].

In fact, 2-propanol is an excellent solvent and is involved in many industry processes such as cosmetics and pharmaceutical industries. Being twice as effective as ethanol, 2-propanol is the broadly used disinfectant in pharmaceutical, medical care, cleanrooms, and electronics industries [27]. It is also used as a gasoline additive to keep carburetors from freezing up in internal combustion vehicles [28]. The higher gravimetric energy density (8.6 kWh/kg) compared with that of methanol (6.1 kWh/kg) and ethanol (8.0 kWh/kg) is one more advantage for 2-propanol as a liquid fuel [29].

Recently, interests have been more dedicated to alkaline than acidic D2PFCs because of their higher performance which is likely resulted from the faster kinetics of the alcohol electrooxidation and the oxygen electroreduction in alkaline medium [30–35]. As the alkaline 2POR proceeds at low overpotential via the acetone production pathway (CH₃CHOHCH₃ + 2OH⁻ ⟶ CH₃COCH₃ + 2H₂O + 2e⁻) [30, 36, 37], several noble metals, including Pt, Pd, and Au, that exhibited previously excellent catalytic properties for several vital processes, have been recommended for 2POR [38–41]. However, the obtained oxidation currents (I_p) decayed dramatically at low overpotentials which implies the rapid poisoning of the catalyst surface from the oxidation products [30, 42, 43]. Acetone was the suspicious poisoning species, as previously proposed for 2POR at Pd surfaces in alkaline medium [44].

This research addresses the impact of modifying a nanoparticle-based Pd surface with Pt and Au nanoparticles to test their potential to mitigate the activity deterioration of the Pd substrates during 2POR due to acetone poisoning. Three different catalysts (Pd/GC, Pd/Pt/GC, and Pd/Au/GC) will be prepared, characterized, and catalytically evaluated toward 2POR. The relationship between the concentration of electrolyte medium (NaOH) and the potential scan rate on the I_p will be obtained and the mechanism of enhancement toward the 2POR will be discussed.

2. Experimental Procedures

A cleaned GC (d = 5.0 mm), Ag/AgCl/NaCl (3 M), a spiral Pt wire were served, respectively, as the working, reference, and counter electrodes. The cleaning of the GC electrode was carried out through the conventional cleaning procedures described previously [5].

All chemicals in the current study were of high purity and were used without any prior purification. The electrodepositions of Pd, Pt, and Au were all carried out in 0.1 M Na₂SO₄ solutions containing, respectively, 2.0 mM Pd (CH₃COO)₂, 2.0 mM H₂PtCl₆.6H₂O, 2.0 mM HAuCl₄.3H₂O at 0.1 V, allowing the passage of 10 mC.

Electrochemical tests were conducted at room temperature (25 ± 1°C) in a two compartments three electrodes glass cell. The electrochemical workstation, SP-150 Bio-Logic SAS potentiostat operated with EC-Lab software was employed.

The surface morphology and composition of the proposed catalysts were obtained using a Zeiss Ultra 60 field emission scanning electron microscope (FE-SEM) equipped with energy-dispersive X-ray spectroscopy (EDX).

3. Results and Discussion

3.1. Electrochemical and Material Characterization

Figure 1 shows the typical behaviour of Pd-based catalysts in alkaline media where the Pd oxidation to PdO which extended from −0.2 to 0.6 V was coupled with the subsequent reduction of PdO to Pd again at −0.4 V. Along with that, the hydrogen adsorption/desorption (H_ads/des) region was observed between −0.6 and −0.9 V. This behaviour was observed for all proposed catalysts (Figures 1(a)–1(d)). A deeper inspection of Figure 1 reveals several other important observations:(i)Compared to the bulk Pd catalyst (Figure 1(a)), a larger surface area (SA) was obtained at the nanoparticles-modified catalysts (Figures 1(b)–1(d)). The SA was calculated to be 0.08, 0.52, 0.59, and 0.83 cm² for the Pd, Pd/GC, Pd/Pt/GC, and Pd/Au/GC catalysts, respectively, based on the charge associated with the PdO reduction peak using a reference value of 420 μC·cm⁻² [5]. This trend appeared again in the H_ads/des region because of the large surface area offered by nanoparticles.(ii)The Pd/Pt/GC (Figure 1(c)) and the Pd/Au/GC (Figure 1(d)) catalysts acquired a broader PdO reduction peak compared to that obtained at the Pd/GC catalyst (Figure 1(b)). This highlighted the role of adding the Pt and Au surface modifiers in providing diverse Pd–Pd and Pd–O bonding and/or facets’ reconstruction for the Pd surface.(iii)The large H_ads/des peaks at the Pd/Pt/GC catalyst referred to the participation of both Pd and Pt in this reaction [45].(iv)The disappearance of the Au characteristic peaks at the Pd/Au/GC catalyst (Figure 1(d)) might refer to the formation of a “core (Au)-shell (Pd)” structure [45].

Additionally, by using the state-of-art technologies, the surface morphology (Figure 2) of the proposed catalysts; Pd/C (Figure 2(a)), Pd/Pt/GC (Figure 2(b)), and Pd/Au/GC (Figure 2(c)) was obtained using the FE-SEM. Figure 2(a) confirmed the successful deposition of Pd in the Pd/GC catalyst as well-distributed spherical nanoparticles having an average diameter of ca. 30 nm. Too larger sizes (100 and 120 nm) of spherical Pd particles were obtained, respectively, at the Pd/Pt/GC (Figure 2(b)) and the Pd/Au/GC (Figure 2(c)) catalysts. It seems that Pd was deposited onto Pt and Au in single bigger particles.

To further confirm the successful deposition of all ingredients of the proposed catalysts, EDX analysis was obtained. Figure 3 shows the EDX analyses of the Pd/GC (Figure 3(a)), Pd/Pt/GC (Figure 3(b)), and the Pd/Au/GC (Figure 3(c)) catalysts. As clearly shown, all catalysts’ components (C, O, Pd) existed in the three proposed catalysts additionally with Pt and Au that were observed, respectively, at the Pd/Pt/GC and the Pd/Au/GC catalysts.

3.2. Electrocatalytic Activities of the Catalysts toward 2POR

Figure 4 shows the alkaline 2POR at the proposed catalysts. All catalysts showed the typical behaviour of the 2POR where two anodic peaks were observed at ca. −0.15 and −0.28 V, respectively, in the positive and the negative scans, which agreed with previous literature [37, 41, 43]. The low oxidation current (I_p, ca. 0.029 mA) obtained at the Pd catalyst (Figure 4(a)) was attributed to the surface poisoning with the strongly adsorbed oxidation product, acetone, at the Pd surface [44]. The poisoning with acetone was assumed to block most of the Pd active sites and, therefore, diminish the overall activity of the 2POR. A better scenario was observed at the Pd/GC (Figure 4(b)) catalyst at which the I_p reached ca. 0.279 mA (ca. 10 times higher than that obtained at the Pd catalyst).

The consecutive modification of the Pd/GC catalyst with Pt and Au could further diminish such a poisoning impact, where the I_p value reached 0.299 and 0.386 mA, respectively, at the Pd/Pt/GC (Figure 4(c)) and the Pd/Au/GC (Figure 4(d)) catalysts. The inset of Figure 4 shows the current values normalized to the mass of deposited Pd (specific currents) for the Pd/GC, Pd/Pt/GC, and the Pd/Au/GC catalysts. The obtained values were 51, 55, and 71 mA·mg_Pd⁻¹, respectively.

The enhancement behaviour in the catalytic activity was also reflected in measuring the catalytic stability. Figure 5 shows the current transients (i-t) of the proposed catalysts. The enhancment in the catalytic stability was reflected from achieving higher currents after 1800 s of contineous electrolysis. As observed, the current trend was in the order of Pd (Figure 5(a)) < Pd/GC (Figure 5(b)) < Pd/Pt/GC (Figure 5(c)) < Pd/Au/GC (Figure 5(d)).

To understand the mechanism of enhancement toward the 2POR, in terms of the charge transfer, Nyquist plots were obtained and analyzed (see Figure 6). As well-known, Nyquist plots assess the charge transfer resistance (R_ct) of the catalyst, which is obtained from the semicircle diameter, evaluating the reaction kinetics [45]. In agreement with the data of Figures 4(a) and 5(a) depicting, respectively, the poor activity and stability of the Pd catalyst, Figure 6(a) assigned the highest R_ct value (45.39 kΩ) for the same “pristine” Pd catalyst toward the 2POR. This indicates a sluggish kinetics toward the 2POR at the Pd catalyst.

On the other hand, the Pd/GC (Figure 6(b)), Pd/Pt/GC (Figure 6(c)), and the Pd/Au/GC catalysts offered much lower R_ct values (2.79, 2.18, and 1.85 kΩ, respectively), indicating faster charge transfer kinetics toward the 2POR. It is thought that such an enhancement came from the weak adsorption of acetone and/or its faster removal at the modified catalysts [30].

3.3. Parameters Affecting 2POR

To achieve a better electrocatalytic 2POR, the effect of changing the NaOH concentration and scan rate were examined. Figures 7(a)–7(d) shows the effect of changing the NaOH concentration on the I_p value of the 2POR at all proposed catalysts. It was obvious that increasing the NaOH concentration increases the I_p value in a linear way with a correlation coefficient of ca. 0.98. It seems that increasing the OH⁻ concentration facilitated the removal of the adsorbed intermediates that increased the availability of more active sites for the 2POR [46].

(a)

(b)

(c)

(d)

Additionally, Figures 8(a)–8(d) shows the effect of changing the scan rate on the I_p value of the 2POR at all proposed catalysts. It was clear that a slight shift of the I_p to more positive values was observed with increasing the potential scan rates, suggesting a kinetic limitation [47]. Moreover, as the scan rate increases, the I_p value increases and a linear dependence of the square root of the scan rate and the I_p was observed with a correlation coefficient ranging from 0.95 to 0.99, which confirmed the diffusion-controlled process [48].

(a)

(b)

(c)

(d)

4. Conclusion

This research aimed at examining the electrocatalytic performance toward 2POR in an alkaline medium at several proposed (Pd/GC, Pd/Pt/GC, and Pd/Pt/GC) nanocatalysts. The Pd/Au/GC catalyst showed the highest catalytic activity and stability in terms of the highest current values. Nyquist plots assessed the charge transfer enhancement where the Pd/Au/GC catalyst showed the fastest charge transfer kinetics (the lowest R_ct value) toward the 2POR. From another perspective, the effects of changing the potential scan rate and the NaOH concentration on the oxidation currents were monitored and several mechanistic correlations were deduced in view of the recommended modifications at all the proposed catalysts.

Data Availability

The data presented in this study are available on request from the corresponding author.

Disclosure

The first version of this paper has been presented at preprints.org [49].

Conflicts of Interest

The authors declare that they have no conflicts of interest.

Authors’ Contributions

Islam M. Al-Akraa and Ahmad M. Mohammad conceptualized the study; Kareem Ayman and Yaser M. Asal proposed the methodology; Yaser M. Asal and Islam M. Al-Akraa performed formal analysis; Islam M. Al-Akraa and Ahmad M. Mohammad investigated the study; Islam M. Al-Akraa provided the resources; Kareem Ayman and Islam M. Al-Akraa wrote the original draft; Ahmad M. Mohammad reviewed and edited the article; and Islam M. Al-Akraa supervised the study. All authors have read and agreed to the published version of the manuscript.

References

C.-W. Su, L.-D. Pang, M. Qin, O. R. Lobonţ, and M. Umar, “The spillover effects among fossil fuel, renewables and carbon markets: evidence under the dual dilemma of climate change and energy crises,” Energy, vol. 274, Article ID 127304, 2023.
View at: Publisher Site | Google Scholar
L. Pang, M. N. Zhu, and H. Yu, “Is green finance really a blessing for green technology and carbon efficiency?” Energy Economics, vol. 114, Article ID 106272, 2022.
View at: Publisher Site | Google Scholar
S. Kaya, “Synthesis, characterization and 1-propanol electrooxidation application of carbon nanotube supported bimetallic catalysts,” International Journal of Hydrogen Energy, vol. 48, pp. 18398–18404, 2023.
View at: Publisher Site | Google Scholar
T. Molodtsova, M. Gorshenkov, S. Kubrin, A. Saraev, A. Ulyankina, and N. Smirnova, “One-step access to bifunctional γ-Fe2O3/δ-FeOOH electrocatalyst for oxygen reduction reaction and acetaminophen sensing,” Journal of the Taiwan Institute of Chemical Engineers, vol. 140, Article ID 104569, 2022.
View at: Publisher Site | Google Scholar
H. H. Farrag, I. M. Al-Akraa, N. K. Allam, and A. M. Mohammad, “Amendment of palladium nanocubes with iron oxide nanowires for boosted formic acid electro−oxidation,” Arabian Journal of Chemistry, vol. 16, no. 3, Article ID 104524, 2023.
View at: Publisher Site | Google Scholar
H. E. Hassan, Y. M. Asal, A. M. Mohammad, and I. M. Al-Akraa, “Biodiesel production from CASTOR oil: mixing optimization during transesterification,” ARPN Journal of Engineering and Applied Sciences, vol. 17, pp. 844–848, 2022.
View at: Google Scholar
R. Ayman, Y. M. Asal, A. M. Mohammad, and I. M. Al-Akraa, “CASTOR oil conversion to biodiesel: a process simulation study,” ARPN Journal of Engineering and Applied Sciences, vol. 17, pp. 964–968, 2022.
View at: Google Scholar
I. M. Al-Akraa, T. Ohsaka, and A. M. Mohammad, “A promising amendment for water splitters: boosted oxygen evolution at a platinum, titanium oxide and manganese oxide hybrid catalyst,” Arabian Journal of Chemistry, vol. 12, no. 7, pp. 897–907, 2019.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa, Y. M. Asal, and S. D. Khamis, “Assembling of NiOx/MWCNTs-GC anodic nanocatalyst for water electrolysis applications,” International Journal of Electrochemical Science, vol. 13, no. 10, pp. 9712–9720, 2018.
View at: Publisher Site | Google Scholar
Y. M. Asal, A. M. Mohammad, S. S. Abd El Rehim, and I. M. Al-Akraa, “Co-electrodeposited PtPd anodic catalyst for the direct formic acid fuel cells,” Energy Reports, vol. 8, pp. 560–564, 2022.
View at: Publisher Site | Google Scholar
B. A. Al-Qodami, H. H. Alalawy, I. M. Al-Akraa, S. Y. Sayed, N. K. Allam, and A. M. Mohammad, “Surface engineering of nanotubular ferric oxyhydroxide “goethite” on platinum anodes for durable formic acid fuel cells,” International Journal of Hydrogen Energy, vol. 47, no. 1, pp. 264–275, 2022.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa and A. M. Mohammad, “A spin-coated TiOx-modified Pt anodic catalyst for the direct methanol fuel cells,” Energy Reports, vol. 8, pp. 438–442, 2022.
View at: Publisher Site | Google Scholar
J.-C. Shyu and S.-H. Hung, “Flow field effect on the performance of direct formic acid membraneless fuel cells: a numerical study,” Processes, vol. 9, no. 5, p. 746, 2021.
View at: Publisher Site | Google Scholar
G. A. Rubio and W. E. Agila, “A fuzzy model to manage water in polymer electrolyte membrane fuel cells,” Processes, vol. 9, no. 6, p. 904, 2021.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa, A. E. Salama, Y. M. Asal, and A. M. Mohammad, “Boosted performance of NiOx/Pt nanocatalyst for the electro-oxidation of formic acid: a substrate's functionalization with multi-walled carbon nanotubes,” Arabian Journal of Chemistry, vol. 14, no. 10, Article ID 103383, 2021.
View at: Publisher Site | Google Scholar
B. A. Al-Qodami, S. Y. Sayed, H. H. Alalawy, I. M. Al-Akraa, N. K. Allam, and A. M. Mohammad, “Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides,” RSC Advances, vol. 13, no. 30, pp. 20799–20809, 2023.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa, A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, “Advances in direct formic acid fuel cells: fabrication of efficient Ir/Pd nanocatalysts for formic acid electro-oxidation,” International Journal of Electrochemical Science, vol. 10, no. 4, pp. 3282–3290, 2015.
View at: Publisher Site | Google Scholar
M. S. El-Deab, A. M. Mohammad, G. A. El-Nagar, and B. E. El-Anadouli, “Impurities contributing to catalysis: enhanced electro-oxidation of formic acid at Pt/GC electrodes in the presence of vinyl acetate,” Journal of Physical Chemistry C, vol. 118, no. 39, pp. 22457–22464, 2014.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa, A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, “Electrooxidation of formic acid at platinum-gold nanoparticle-modified electrodes,” Chemistry Letters, vol. 40, no. 12, pp. 1374-1375, 2011.
View at: Publisher Site | Google Scholar
E. Berretti, M. Longhi, P. Atanassov et al., “Platinum group metal-free Fe-based (FeNC) oxygen reduction electrocatalysts for direct alcohol fuel cells,” Current Opinion in Electrochemistry, vol. 29, Article ID 100756, 2021.
View at: Publisher Site | Google Scholar
S. S. Siwal, S. Thakur, Q. B. Zhang, and V. K. Thakur, “Electrocatalysts for electrooxidation of direct alcohol fuel cell: chemistry and applications,” Materials Today Chemistry, vol. 14, Article ID 100182, 2019.
View at: Publisher Site | Google Scholar
F. Karimi, M. Akin, R. Bayat et al., “Application of quasihexagonal Pt@PdS2-MWCNT catalyst with high electrochemical performance for electro-oxidation of methanol, 2-propanol, and glycerol alcohols for fuel cells,” Molecular Catalysis, vol. 536, Article ID 112874, 2023.
View at: Publisher Site | Google Scholar
A. Kormányos, A. Savan, A. Ludwig, F. D. Speck, K. J. J. Mayrhofer, and S. Cherevko, “Electrocatalytic oxidation of 2-propanol on PtxIr100-x bifunctional electrocatalysts – a thin-film materials library study,” Journal of Catalysis, vol. 396, pp. 387–394, 2021.
View at: Publisher Site | Google Scholar
C. Wang, K. Zhang, H. Xu, Y. Du, and M. C. Goh, “Anchoring gold nanoparticles on poly(3,4-ethylenedioxythiophene) (PEDOT) nanonet as three-dimensional electrocatalysts toward ethanol and 2-propanol oxidation,” Journal of Colloid and Interface Science, vol. 541, pp. 258–268, 2019.
View at: Publisher Site | Google Scholar
T. Tamiji and A. Nezamzadeh-Ejhieh, “A comprehensive kinetic study on the electrocatalytic oxidation of propanols in aqueous solution,” Solid State Sciences, vol. 98, Article ID 106033, 2019.
View at: Publisher Site | Google Scholar
J. Otomo, X. Li, T. Kobayashi, C. J. Wen, H. Nagamoto, and H. Takahashi, “AC-impedance spectroscopy of anodic reactions with adsorbed intermediates: electro-oxidations of 2-propanol and methanol on carbon-supported Pt catalyst,” Journal of Electroanalytical Chemistry, vol. 573, no. 1, pp. 99–109, 2004.
View at: Publisher Site | Google Scholar
J. E. Logsdon and R. A. Loke, “Isopropyl alcohol,” in Kirk-Othmer Encyclopedia of Chemical Technology, Encyclopedia Britannica Inc, Edinburgh, UK, 2000.
View at: Google Scholar
M. Nacef, M. L. Chelaghmia, A. M. Affoune, and M. Pontie, “Nanocatalysts for direct 2-propanol fuel cells,” Materials Research Foundations, vol. 49, pp. 103–128, 2019.
View at: Publisher Site | Google Scholar
F. A. Zakil, S. K. Kamarudin, and S. Basri, “Modified Nafion membranes for direct alcohol fuel cells: an overview,” Renewable and Sustainable Energy Reviews, vol. 65, pp. 841–852, 2016.
View at: Publisher Site | Google Scholar
Y. Liu, Y. Zeng, R. Liu, H. Wu, G. Wang, and D. Cao, “Poisoning of acetone to Pt and Au electrodes for electrooxidation of 2-propanol in alkaline medium,” Electrochimica Acta, vol. 76, pp. 174–178, 2012.
View at: Publisher Site | Google Scholar
J. Lu, S. Lu, D. Wang et al., “Nano-structured PdxPt1−x/Ti anodes prepared by electrodeposition for alcohol electrooxidation,” Electrochimica Acta, vol. 54, no. 23, pp. 5486–5491, 2009.
View at: Publisher Site | Google Scholar
Y. Wang, L. Li, L. Hu, L. Zhuang, J. Lu, and B. Xu, “A feasibility analysis for alkaline membrane direct methanol fuel cell: thermodynamic disadvantages versus kinetic advantages,” Electrochemistry Communications, vol. 5, no. 8, pp. 662–666, 2003.
View at: Publisher Site | Google Scholar
A. T. Hamada, M. F. Orhan, and A. M. Kannan, “Alkaline fuel cells: status and prospects,” Energy Reports, vol. 9, pp. 6396–6418, 2023.
View at: Publisher Site | Google Scholar
F. M. Souza, V. S. Pinheiro, T. C. Gentil et al., “Alkaline direct liquid fuel cells: advances, challenges and perspectives,” Journal of Electroanalytical Chemistry, vol. 922, Article ID 116712, 2022.
View at: Publisher Site | Google Scholar
O. O. Fashedemi, A. Bello, T. Adebusuyi, and S. Bindir, “Recent trends in carbon support for improved performance of alkaline fuel cells,” Current Opinion in Electrochemistry, vol. 36, Article ID 101132, 2022.
View at: Publisher Site | Google Scholar
A. Santasalo-Aarnio, Y. Kwon, E. Ahlberg, K. Kontturi, T. Kallio, and M. T. M. Koper, “Comparison of methanol, ethanol and iso-propanol oxidation on Pt and Pd electrodes in alkaline media studied by HPLC,” Electrochemistry Communications, vol. 13, no. 5, pp. 466–469, 2011.
View at: Publisher Site | Google Scholar
M. E. P. Markiewicz and S. H. Bergens, “Electro-oxidation of 2-propanol and acetone over platinum, platinum–ruthenium, and ruthenium nanoparticles in alkaline electrolytes,” Journal of Power Sources, vol. 185, no. 1, pp. 222–225, 2008.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa, A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, “Self-assembling of gold nanoparticles array for electro-sensing applications,” International Journal of Electrochemical Science, vol. 8, no. 1, pp. 458–466, 2013.
View at: Publisher Site | Google Scholar
W. Zhou, C. Wang, J. Xu, Y. Du, and P. Yang, “Enhanced electrocatalytic performance for isopropanol oxidation on Pd–Au nanoparticles dispersed on poly(p-phenylene) prepared from biphenyl,” Materials Chemistry and Physics, vol. 123, no. 2-3, pp. 390–395, 2010.
View at: Publisher Site | Google Scholar
A. Santasalo, F. J. Vidal-Iglesias, J. Solla-Gullón, A. Berná, T. Kallio, and J. M. Feliu, “Electrooxidation of methanol and 2-propanol mixtures at platinum single crystal electrodes,” Electrochimica Acta, vol. 54, no. 26, pp. 6576–6583, 2009.
View at: Publisher Site | Google Scholar
J. Liu, J. Ye, C. Xu, S. P. Jiang, and Y. Tong, “Electro-oxidation of methanol, 1-propanol and 2-propanol on Pt and Pd in alkaline medium,” Journal of Power Sources, vol. 177, no. 1, pp. 67–70, 2008.
View at: Publisher Site | Google Scholar
C. Xu, Z. Tian, Z. Chen, and S. P. Jiang, “Pd/C promoted by Au for 2-propanol electrooxidation in alkaline media,” Electrochemistry Communications, vol. 10, no. 2, pp. 246–249, 2008.
View at: Publisher Site | Google Scholar
M. E. P. Markiewicz, D. M. Hebert, and S. H. Bergens, “Electro-oxidation of 2-propanol on platinum in alkaline electrolytes,” Journal of Power Sources, vol. 161, no. 2, pp. 761–767, 2006.
View at: Publisher Site | Google Scholar
Y. Cheng, Y. Liu, D. Cao, G. Wang, and Y. Gao, “Effects of acetone on electrooxidation of 2-propanol in alkaline medium on the Pd/Ni-foam electrode,” Journal of Power Sources, vol. 196, no. 6, pp. 3124–3128, 2011.
View at: Publisher Site | Google Scholar
I. M. Al-Akraa, Y. M. Asal, and A. M. Mohammad, “Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation,” Arabian Journal of Chemistry, vol. 15, no. 8, Article ID 103965, 2022.
View at: Publisher Site | Google Scholar
K. M. Hassan, A. A. Hathoot, R. Maher, and M. Abdel Azzem, “Electrocatalytic oxidation of ethanol at Pd, Pt, Pd/Pt and Pt/Pd nano particles supported on poly 1,8-diaminonaphthalene film in alkaline medium,” RSC Advances, vol. 8, no. 28, pp. 15417–15426, 2018.
View at: Publisher Site | Google Scholar
J. B. Raoof, R. Ojani, and S. R. Hosseini, “An electrochemical investigation of methanol oxidation on nickel hydroxide nanoparticles,” J South African Journal of Chemistry, vol. 66, 2013.
View at: Google Scholar
I. Danaee, M. Jafarian, A. Mirzapoor, F. Gobal, and M. G. Mahjani, “Electrooxidation of methanol on NiMn alloy modified graphite electrode,” Electrochimica Acta, vol. 55, no. 6, pp. 2093–2100, 2010.
View at: Publisher Site | Google Scholar
K. Ayman, Y. M. Asal, A. M. Mohammad, and I. M. Al-Akraa, “Efficient electro-oxidation of 2-propanol at platinum and gold-modified palladium nanocatalysts,” Preprints, vol. 2023, 2023.
View at: Google Scholar

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