期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 10, 期 3, 页码 1182-1194出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c06514
关键词
nickel phosphide; N, P-doped carbon; microstructures; bifunctional electrocatalysts; water splitting
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2018R1A5A1025224]
- Creative Materials Discovery Program through the National Research Foundation of Korea [NRF-2016M3D1A1021141]
- Technology Innovation Program (Development of Superalloy Powder and Parts Manufacturing Technology for Additive Manufacturing) - Ministry of Trade, Industry and Energy (MOTIE, Korea) [20011298]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government Ministry of Trade [20194030202470]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20011298] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study introduces single-phase metal-rich nickel phosphide (Ni12P5)-incorporated carbon composites for a highly efficient water-splitting system. The optimized composites show superior activity in both oxygen evolution and hydrogen evolution reactions, achieving high current density at a stable potential, which can contribute to the development of enhanced electrochemical energy systems.
The demand for developing high-efficiency multifunctional electrocatalysts with a long-term stability rapidly increases for achieving the commercialization of sustainable hydrogen (H-2) production via cost-effective water electrolysis systems. This study describes single-phase metal-rich nickel phosphide (Ni12P5)-incorporated carbon composites for a highly efficient water-splitting system. The distinct Ni12P5 is anchored in nitrogen (N)- and phosphorus (P)-rich carbon matrices (Ni12P5@N,P-C); the creation of the matrices entails a facile hydrothermal-followed pyrolysis treatment to explore their bifunctional activities in the water-splitting system. Owing to the superior activity of the rich Ni (delta(+)) component for the production of molecular oxygen and that of P (delta(-))and N species in the carbon framework for hydrogen adsorption, the optimized Ni12P5@N,P-C composites contribute effectively toward both high oxygen evolution and hydrogen evolution reactions. Consequently, the Ni12P5@N,P-C composite-based two-electrode water-splitting system shows a low operating potential of 1.57 V at 10 mA cm(-2) and achieves the commercially required high current density of 500 mA cm(-2) at a stable potential of 2 V. The functionalization of composite electrocatalysts based on strategical engineering and the intrusion of multiple active sites can help develop enhanced electrochemical energy systems.
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