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Noble Metal‐Free CoSx/NiSx Heterojunction for Photo‐Assisted Methanol Electrooxidation

Von Wiley-VCH zur Verfügung gestellt

Designing noble metal-free anode catalysts for photo-assisted direct methanol fuels cells still remains a significant challenge. In this report, CoSx /NiSx heterojunction was prepared by a two-step method containing room temperature coordination reaction and calcination using L-cysteine as both organic ligands and sulfur sources. The as-prepared CoSx /NiSx heterojunction displayed a significant enhancement in the methanol electrocatalytic oxidation activity under the light irradiation by combining their electrocatalytic and photocatalytic properties. The photocatalytic process was discussed in detail to explore the photo-assisted enhancement mechanism . The electrochemical and photochemical results indicated that, the synergistic effect of electro- and photocatalytic reaction contributes to the enhanced catalytic performance. This work provides a new paradigm to improve the methanol electrocatalytic activity of noble metal-free semiconductor catalyst. Our proposed noble metal-free CoSx /NiSx heterojunction will have potential use in photo-assisted direct methanol fuel cells.

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