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Issue 7, 2016
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Versatile nanoporous bimetallic phosphides towards electrochemical water splitting

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Abstract

Alloying is an important approach to improving catalytic activities and realizing new functions of heterogeneous catalysts, which has extensively been employed in fabricating noble metal based bimetallic catalysts. However, it is technically unviable in the synthesis of alloyed transition metal compounds, which are emerging as important catalysts for water splitting, in a controllable manner using conventional wet chemical methods. Here we report nanoporous bimetallic (Co1−xFex)2P phosphides with controllable compositions and tuneable porosity, which are fabricated by the combination of metallurgical alloy design and electrochemical etching. By tailoring the Co/Fe ratios and nanoporosity, the bimetallic phosphides exhibit versatile catalytic activities towards HER and OER in acidic and basic electrolytes. As both the cathode and the anode of an electrolyser, nanoporous (Co0.52Fe0.48)2P shows an outstanding performance in water electrolysis, comparable to the commercial electrolyser with paired Pt/C and IrO2 catalysts.

Graphical abstract: Versatile nanoporous bimetallic phosphides towards electrochemical water splitting

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Article information


Submitted
15 Apr 2016
Accepted
11 May 2016
First published
11 May 2016

Energy Environ. Sci., 2016,9, 2257-2261
Article type
Communication

Versatile nanoporous bimetallic phosphides towards electrochemical water splitting

Y. Tan, H. Wang, P. Liu, Y. Shen, C. Cheng, A. Hirata, T. Fujita, Z. Tang and M. Chen, Energy Environ. Sci., 2016, 9, 2257
DOI: 10.1039/C6EE01109H

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