High-performance Ru-based electrocatalyst composed of Ru nanoparticles and Ru single atoms for hydrogen evolution reaction in alkaline solution |
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| Affiliation: | 1. Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, PR China;2. School of Iron and Steel, Soochow University, Suzhou, Jiangsu 215123, PR China;1. Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;2. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China |
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| Abstract: | Hydrogen evolution reaction (HER) plays a critical role in electrocatalysis, and developing highly active, cheap and stable Pt-free catalysts for HER in alkaline media is imperative for conversion of renewable energy into hydrogen fuels via photo/electrochemical water splitting. Herein, we report a facile strategy to fabricate a high-performance Ru-NMCNs-T electrocatalyst (T is the annealing temperature) for HER, which consist of both Ru nanoparticles and single Ru atoms well dispersed on nitrogen-doped mesoporous carbon nanospheres (NMCNs). Ru-NMCNs-500 exhibited the best HER performance in the series. To achieve a current density of 10 mA cm−2 in 1 M KOH, it only needs an overpotential of 28 mV with a small Tafel slope of 35.2 mA dec−1, superior to the commercial Pt/C catalyst. It also exhibited exceedingly improved long-term stability than Pt/C. This study can open a new avenue for preparing Ru-based catalysts toward HER under extreme alkaline conditions. |
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| Keywords: | Hydrogen evolution reaction Ru-based electrocatalysts Nitrogen-doped mesoporous carbon nanospheres Ru single atoms Alkaline solution |
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