Pt NPs-loaded siloxene nanosheets for hydrogen co-evolutions from Zn-H2O fuel cells-powered water-splitting

Chen, Yafeng ¹Qi, Fenggang ²Chang, Ziwei ³Zhu, Libo ²Huang, Haitao ⁴Shi, Jianlin ²Xia, Bao Yu ⁵Chen, Chang ²Tian, Han ²Fu, Zhengqian ²Cui, Xiangzhi ²Kong, Fantao ²Meng, Ge²

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作者信息

1. Univ Sci & Technol Beijing
2. Chinese Acad Sci
3. Shanghai Tech Univ
4. Hong Kong Polytech Univ
5. Huazhong Univ Sci & Technol
折叠

Abstract

Siloxene features abundant functional groups and oxygen vacancies, which facilitates the ultrafine platinum nanoparticles loading for catalyzing hydrogen evolution reaction (HER). Herein, a siloxene-p-Pt-2 h composite has been fabricated with an ultralow platinum loading on siloxene (0.56 wt%), which shows greatly enhanced HER activity featuring an ultralow overpotential (eta(10) = 23 mV). Attractively, the siloxene-p-Pt-2 h has been applied as a HER catalyst in a Zn-H2O fuel cell, demonstrating a high power density of 157 mW cm(-2) in coupling with the cathode hydrogen evolution. Moreover, a coupled configuration between two Zn-H2O fuel cells in series and the cell-powered hydroxide electrolyzer achieves the efficient hydrogen co-productions co-catalyzed by the HER catalysts. The excellent HER performance is attributed to the hydrophilic character and the optimal Gibbs free energy via the strong interaction between the siloxene and platinum nanoparticles. This work provides a novel design of self-powered co-productions of hydrogen.

Key words

Siloxene/Hydrophilicity/Electronic interaction/Co-productions/Zn-H2O cell/EFFICIENT ELECTROCATALYSTS/HIGH-PERFORMANCE/SINGLE-ATOM/GRAPHENE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量22

参考文献量50

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