A Monodisperse Rh2P‐Based Electrocatalyst for Highly Efficient and pH‐Universal Hydrogen Evolution Reaction |
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| Authors: | Fulin Yang Yuanmeng Zhao Yeshuang Du Yongting Chen Gongzhen Cheng Shengli Chen Wei Luo |
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| Affiliation: | 1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, P. R. China;2. Hubei Key Laboratory of Electrochemical Power Sources Wuhan, Hubei, P. R. China |
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| Abstract: | The search for Pt‐free electrocatalysts exceeding pH‐universal hydrogen evolution reaction (HER) activities when compared to the state‐of‐the‐art commercial Pt/C is highly desirable for the development of renewable energy conversion systems but still remains a huge challenge. Here a colloidal synthesis of monodisperse Rh2P nanoparticles with an average size of 2.8 nm and their superior catalytic activities for pH‐universal HER are reported. Significantly, the Rh2P catalyst displays remarkable HER performance with overpotentials of 14, 30, and 38 mV to achieve 10 mA cm?2 in 0.5 m H2SO4, 1.0 m KOH, and 1.0 m phosphate‐buffered saline, respectively, exceeding almost all the documented electrocatalysts, including the commercial 20 wt% Pt/C. Density functional theory calculations reveal that the introduction of P into Rh can weaken the H adsorption strength of Rh2P to nearly zero, beneficial for boosting HER performance. |
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| Keywords: | DFT hydrogen evolution reaction monodisperse Rh2P pH‐universal transition metal phosphides |
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