Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 52, Pages 26391-26401Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.05.151
Keywords
Electrocatalysis; Transition metal phosphides; Metal doping; Holey nanosheets; Overall water splitting
Categories
Funding
- National Natural Science Foundation of China [21878130]
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In this study, mesh-like Fe-doped CoP holey nanosheets (Fe-CoP HNSs) were synthesized through a phosphorization treatment, showcasing superior catalytic activity towards hydrogen and oxygen evolution reactions. The Fe-CoP HNSs catalyst features abundant active sites and efficient mass transfer kinetics, making it a promising candidate for water splitting electrocatalysis. The assembled Fe-CoP HNSs electrolyzer requires a low cell voltage to deliver high current densities, outperforming many reported transition metal phosphides electrocatalysts.
Two-dimensional porous nanosheet material has attracted great attention as a promising electrocatalyst for water splitting. Herein, mesh-like Fe-doped CoP holey nanosheets (Fe-CoP HNSs) is synthesized by a facile phosphorization treatment. The Fe-CoP HNSs catalyst features abundant active sites, short charge and ion transport pathways, and favorable mass transfer kinetics, which are conductive to promote the water splitting reaction. Remarkably, the Fe-CoP HNSs catalyst exhibits superior catalytic activity towards hydrogen and oxygen evolution reaction with low overpotentials of 79 and 220 mV to reach 10 mA cm(-2), respectively. Furthermore, the assembled Fe-CoP HNSs parallel to Fe-CoP HNSs electrolyzer needs a low cell voltage of 1.60 V to deliver 20 mA cm(-2), which is higher than many reported transition metal phosphides electrocatalysts. This work sheds light on the fabrication of transition-metal compound electrocatalyst with holey nanosheet structure by element doping for renewable energy production. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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