期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 304, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.121008
关键词
Siloxene; Hydrophilicity; Electronic interaction; Co-productions; Zn-H2O cell
资金
- National Natural Science Foundation of China [21835007, 52172110]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences [ZDBS-LY-SLH029]
- Scientific and Technical Innovation Action Plan Hong Kong, Macao and Taiwan Science & Technology Cooperation Project of Shanghai Science and Technology Committee [21520760500]
- Natural Science Foundation of Shanghai [19ZR1479400]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
A siloxene-p-Pt-2 h composite with ultralow platinum loading has been fabricated as a highly active HER catalyst, exhibiting high power density in Zn-H2O fuel cell and co-producing hydrogen with a hydroxide electrolyzer.
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.
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