Green Hydrogen Production Directly from Seawater with No Corrosion Using a Nonmetallic Electrode: A Novel Solution and a Proof of Concept

Table 2

Calculated pore volume for the nonmetallic rock sample electrodes.

Sample no.	Sample diameter (mm)	Sample length (mm)	Porosity (%)	Pore volume cubic centimeter
3	25.08	75.02	21.48%	7.96
2	25.09	76.56	25.07%	9.49
4	25.04	74.56	27.07%	9.94
1	25.18	74.04	28.99%	10.69
7	37.74	74.46	20.65%	17.20
6	37.73	73.22	23.63%	19.34
5	37.74	71.83	24.14%	19.40