Journal
NANOSCALE
Volume 12, Issue 46, Pages 23851-23858Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr07126a
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Funding
- National Natural Science Foundation of China [21875187, 51775434]
- China Postdoctoral of Science Foundation [2019M653404, 2020T130527]
- Natural Science Foundation of Shanxi Province [2018JM2007]
- Key Laboratory Research Foundation of Education Committee of Shaanxi Province [19JS062]
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Developing low-cost and highly active bifunctional electrocatalysts for water splitting is very important but still remains a challenge. Herein, a novel bifunctional electrocatalyst composed of CoP and Ni2P nanoparticles implanted in a hollow porous N-doped carbon polyhedron (CoP/Ni2P@HPNCP) is synthesized by carbonization of Co/Ni-layered double hydroxide@zeolitic imidazolate framework-67 (Co/Ni-LDH@ZIF-67) followed by an oxidation and phosphorization strategy. The introduction of LDH can not only promote the formation of a hollow porous structure to supply more active sites, but also generate the CoP/Ni2P nanoheterostructure to afford extra active sites and modulate the electronic structure of the catalyst. As a result, CoP/Ni2P@HPNCP exhibits excellent pH universal hydrogen evolution reaction activity and alkaline oxygen evolution reaction activity. Furthermore, the electrolytic cell assembled from bifunctional CoP/Ni2P@HPNCP requires a cell voltage of 1.59 V in 1.0 M KOH at 10 mA cm(-2), revealing its potential as a high performance bifunctional electrocatalyst.
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