Environmental Engineering Reference
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A
B
C
D
FIGURE 9.6
Atomic structure and the space filling stacking model of Fe-Pc (A,C) and Fe-SPc (B,D).
Source
: Reproduced with permission from Wu et al. [53]. (See color insert.)
reaction (Fig. 9.8). Though the CO
3
O
4
and graphenen oxide alone has little
catalytic activity, their hybrid exhibits an unexpected, surprisingly high
oxygen reduction reaction performance.
Anderson et al. calculated the adsorption energies of the reactants, reac-
tion intermediates, and products for water oxidation and O
2
reduction in
acid on the (008), (002), and (202) surfaces of Co
9
S
8
using the Vienna ab
initio simulation program (VASP) (Fig. 9.9). They found that the partially
OH-covered (202) surface is active toward O
2
reduction. On this surface,
water cannot block the active sites, and heat loss from O
2
dissociative che-
misorptions necessitates the overpotential for four-electron reaction.
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