Highly Mesoporous Cobalt-Hybridized 2D Cu3P Nanosheet Arrays as Boosting Janus Electrocatalysts for Water Splitting
Document Type
Article
Publication Date
12-6-2021
Abstract
Recently, developing economical electrocatalysts with high performance in water decomposition has become a research hotspot. Herein, two kinds of cobalt-hybridized Cu3P nanostructure array electrocatalysts (including highly mesoporous 2D nanosheets and sugar gourd-like 1D nanowires) were controllably grown on a nickel foam substrate through a simple hydrothermal method combined with a subsequent phosphating treatment method. An electrocatalytic test indicated that the as-prepared 2D nanosheet array exhibited excellent activity and stability toward hydrogen evolution reaction under alkaline conditions, which offered a low overpotential of 99 mV at 10 mA/cm2 and a small Tafel slope of 70.4 mV/dec, whereas a competitive overpotential of 272 mV was required for oxygen evolution reaction. In addition, the 2D nanosheet array delivered a low cell voltage of 1.66 V at 10 mA/cm2 in a symmetric two-electrode system, implying its huge potential in overall water decomposition. The electrocatalytic performance is superior to the as-prepared 1D nanowire array and most of the Cu3P-related electrocatalysts previously reported. Experimental measurements and first-principles calculations show that the excellent performance of the 2D nanosheet array can be attributed to its unique 2D mesoporous structure and hybridization of cobalt, which not only provide a large electrochemically active surface and fast electrocatalytic reaction kinetics but also weaken the binding strength of electrocatalytic reaction intermediates. The present study provides a simple and controllable approach to synthesize Cu3P-based bimetallic phosphide nanostructures, which can be used as boosting Janus electrocatalysts for water decomposition.
Identifier
85120381720 (Scopus)
Publication Title
Inorganic Chemistry
External Full Text Location
https://doi.org/10.1021/acs.inorgchem.1c02954
e-ISSN
1520510X
ISSN
00201669
PubMed ID
34802232
First Page
18325
Last Page
18336
Issue
23
Volume
60
Grant
20204BCJ23004
Fund Ref
National Natural Science Foundation of China
Recommended Citation
Liu, Yuan; Yang, Yong; Chen, Bin; Li, Xin; Guo, Manman; Yang, Yanxing; Xu, Keng; and Yuan, Cailei, "Highly Mesoporous Cobalt-Hybridized 2D Cu3P Nanosheet Arrays as Boosting Janus Electrocatalysts for Water Splitting" (2021). Faculty Publications. 3586.
https://digitalcommons.njit.edu/fac_pubs/3586
