A synergetic strategy to construct anti-reflective and anti-corrosive Co-P/WSx/Si photocathode for durable hydrogen evolution in alkaline condition

Li, Sijie ¹Lin, Huiwen ²Yang, Gaoliang ¹Ren, Xiaohui ²Luo, Shunqin ²Wang, Xu-sheng ²Chang, Zhi ³Ye, Jinhua¹

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作者信息

1. Hokkaido Univ
2. Natl Inst Mat Sci NIMS
3. Natl Inst Adv Ind Sci & Technol
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Abstract

Developing durable Si-based photoelectrochemical hydrogen evolution reaction in alkaline media is attracting attention in device-level water splitting, but still faces a trade-off between the alkalic corrosion resistance and light transmission for Si photocathodes. Herein, a synergetic strategy is proposed to employ an anti-reflective CoP film cocatalyst modulated via self-assembly of protective-layer WSx onto Si photocathode. The controllable WSx thin-film efficiently ensures the excellent anti-alkali corrosion of Si semiconductors, and serves as an appropriate nucleation base to modulate the structure of Co-P cocatalyst to possess anti-reflection. The optimal Co-P/WSx/Si photocathode exhibits an onset potential of + 0.47 V vs. reversible hydrogen electrode (V-RHE), a photocurrent density of -25.1 mA cm(-2) at 0 V-RHE, and superior durability of up to 300 h at 0 V-RHE in 1.0 M KOH electrolyte. These findings offer a facile and effective approach for the further development of durable Si-based photoelectrochemical devices.

Key words

Planar p-Si photocathode/Anti-corrosive WSx protective layer/Anti-reflective Co-P cocatalyst/Alkaline media/Photoelectrochemical hydrogen evolution/SILICON NANOWIRE ARRAYS/CORROSION BEHAVIOR/WS2 NANOSHEETS/EFFICIENT/WATER/SI/PHOTOANODES/PERFORMANCE/LAYER/PULSE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量4

参考文献量43

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