Catalyst function involving C–C bond cleavage of S-VO-β-Ni(OH)2 in polyol electrooxidation (IMAGE)

Science China Press

Catalyst function involving C–C bond cleavage of S-VO-β-Ni(OH)2 in polyol electrooxidation

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(a) S-VO-β-Ni(OH)2 exhibits efficient catalytic activity in the electrooxidation of ethylene glycol to formic acid without the electrode passivation. (b) During ethylene glycol electrooxidation over S-VO-β-Ni(OH)2, both high-frequency and low-frequency steps function, specifically, the generation of Ni3+–O bonds and the formation of S-VO-Ni2+δ-OHads. (c) The Ni3+–O bond is not available to facilitate the C–C bond cleavage; only S-VO-Ni2+δ-OHads can spontaneously catalyze the C–C bond cleavage. (d) In addition to LOM-HAT and S-VO-AOM-HAT, ethylene glycol electrooxidation over S-VO-β-Ni(OH)2 also follows S-VO-induced adsorbed oxygen-mediated C–C bond cleavage (S-VO-AOM-Cleavage of C–C bond), including the generation of S-VO-Ni2+δ-OHads and S-VO-AO-Cleavage of C–C bond.

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