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The photoelectrochemical production of fuels, exemplified by light‐driven water splitting to hydrogen and oxygen, offers a sustainable option to offset dependence on fossil fuels. A low‐cost, efficient, and stable photoelectrochemical approach to solar fuels remains elusive but using similar materials and photoelectrodes for chemical production or biomass conversion offers an appealing alternative. This work reports a facile method for fabricating pristine (undoped) BiVO4 photoanodes to carry out TEMPO‐mediated benzyl alcohol oxidation to benzaldehyde in organic media (TEMPO=2,2,6,6‐tetramethylpiperidinyl‐N‐oxyl). The best performing BiVO4 photoanode studied here gave a faradaic efficiency (FE) of 85±5% for benzaldehyde formation in the presence of TEMPO and pyridine during a 2.5‐hour reaction. Compared with direct electrocatalytic conversion under the same conditions, light capture and conversion by the BiVO4 surface decreased the required applied bias by 46 %. To our knowledge, this is the first report of visible light assisted, TEMPO‐mediated benzyl alcohol oxidation using pristine BiVO4 photoanodes in organic media.
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McMillan et al. (2022) studied this question.
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