A general approach to cobalt-based homobimetallic phosphide ultrathin nanosheets for highly efficient oxygen evolution in alkaline media

Xiaofen Xiao; Chun-Ting He; Shenlong Zhao; Jing Li; Wensheng Lin; Zhongke Yuan; Qiang Zhang; Shuangyin Wang; Liming Dai; Dingshan Yu

doi:10.1039/C6EE03145E

A general approach to cobalt-based homobimetallic phosphide ultrathin nanosheets for highly efficient oxygen evolution in alkaline media†

Xiaofen Xiao,‡^a Chun-Ting He,‡^b Shenlong Zhao,^c Jing Li,^a Wensheng Lin,^a Zhongke Yuan,^a Qiang Zhang,^d Shuangyin Wang,^e Liming Dai*^f and Dingshan Yu*^a

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^a Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Key Laboratory of High Performance Polymer-based Composites of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
E-mail: yudings@mail.sysu.edu.cn

^b MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China

^c Laboratory for Nanosystem and Hierarchy Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China

^d Beijing Key Laboratory of Green Chemical, Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China

^e State Key Laboratory of Chem/Bio-Sensing and Chemometric, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China

^f Department of Macromolecule Science and Engineering, Case Western Reserve University, Ohio, USA
E-mail: liming.dai@case.edu

Abstract

A general and effective approach was proposed to fabricate a new family of Co-based bimetallic phosphide ultrathin nanosheets (CoM-P-NS, M = Ni, Mn, Cu, Zn) with homogeneous composition and unique porous architecture using ultrathin metal–organic framework nanosheets (MOFNs) as precursors for the first time, which yielded synergistically active sites, mass transport and dynamic modulations for the oxygen evolution reaction (OER). The optimized samples showed remarkable oxygen evolution activity in alkaline electrolytes, outperforming both the commercial RuO₂ and Ir/C benchmarks and ranking the best among all the metal-phosphide electrocatalysts reported to date.

Energy & Environmental Science

A general approach to cobalt-based homobimetallic phosphide ultrathin nanosheets for highly efficient oxygen evolution in alkaline media†

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A general approach to cobalt-based homobimetallic phosphide ultrathin nanosheets for highly efficient oxygen evolution in alkaline media

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