Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies

Figure 4

Scanning electron micrographs of (a) HPMo₁₂; (b) FePMo₁₂; (c) HPMo₁₁V; (d) PMo₁₁Fe.

(a)

(b)

(c)

(d)