Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 298, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120488
Keywords
Cobalt phosphide; Dual-metal doping; Bifunctional; Overall water splitting
Funding
- National Natural Science Foundation of China [21875187]
- 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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This paper presents the fabrication of Ru and Ni dual-metal doped CoP porous nanofibers as high-efficiency bifunctional electrocatalysts. Dual-metal doping can efficiently modulate the electronic structure, leading to enhanced activity and stability. The Ru, Ni-CoP porous nanofibers show excellent electrocatalytic performance.
The rational design and construction of high-efficiency bifunctional electrocatalysts are the central challenges for improving the overall water splitting efficiency. In this paper, Ru and Ni dual-metal doped CoP (Ru, Ni-CoP) porous nanofibers were fabricated. Dual-metal doping can be more efficiently used to modulate the electronic structure than single-metal doping, thereby, achieving decreased water dissociation energy and optimized adsorption energy for different reaction intermediates. Consequently, Ru, Ni-CoP porous nanofibers exhibit highly enhanced bifunctional activities. The electrolytic cell based on Ru, Ni-CoP porous nanofibers, which is significantly superior to Pt/C||IrO2 pairs, requires a low voltage of 1.448 and 1.757 V at 10 and 500 mA cm-2, respectively. The electrolytic cell exhibits excellent long-term stability at 400 mA cm-2. This excellent activity and stability at high-current density provides the considerable potential for the practical applications of Ru, NiCoP porous nanofibers as high-performance bifunctional electrocatalysts.
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