Confining Zero-Valent Platinum Single Atoms in α-MoC_(1?x) for pH-Universal Hydrogen Evolution Reaction

Wang Wen; Wu Yuxuan; Lin YunxiangYao JixinWu XingshunWu ChuanqiangZuo XueqinYang QunGe BinghuiYang LiLi GuangChou ShuleiLi WeijieJiang Yong

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Confining Zero-Valent Platinum Single Atoms in α-MoC_(1?x) for pH-Universal Hydrogen Evolution Reaction

机译：Confining Zero-Valent Platinum Single Atoms in α-MoC_(1?x) for pH-Universal Hydrogen Evolution Reaction

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Single-atom electrocatalysts (SACs) toward hydrogen evolution reaction (HER) have been extensively studied owing to their high mass activity and atom utilization. Although platinum (Pt) based SACs have been reported frequently, optimizing the metal-support interaction to achieve low valence state Pt species is still a challenge. Here, the carbon supported alpha-MoC1-x nanoparticles are used to anchor zero-valent Pt single atoms (Pt-SA/alpha-MoC1-x@C) as electrocatalyst for pH-universal HER. The Pt-SA/alpha-MoC1-x@C with optimized Pt loading of 0.75 wt% shows a low overpotential (21, 12, and 36 mV at 10 mA cm(-2)) and high turnover frequencies (27.00, 31.98, and 21.39 H-2 s(-1) at 100 mV) for HER under alkaline, acidic, and neutral electrolyte conditions. Experimental evidence combing density functional theory calculations confirm that the charge polarization leads to a zero-valence state of Pt single atom and further optimized the adsorption/desorption energy of intermediates, further accelerating the reaction dynamics for HER.

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《Advanced functional materials》 |2022年第12期|2108464.1-2108464.9|共9页
作者
Wang Wen; Wu Yuxuan; Lin YunxiangYao JixinWu XingshunWu ChuanqiangZuo XueqinYang QunGe BinghuiYang LiLi GuangChou ShuleiLi WeijieJiang Yong;
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Anhui Univ, Sch Mat Sci & Engn, Inst Phys Sci, Anhui Key Lab Informat Mat & Device, Hefei 230601, Peoples R China|Anhui Univ, Sch Mat Sci & Engn, Inst Informat Technol, Anhui Key Lab Informat Mat & Device, Hefei 230601, Peoples R China;

Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia;

Tiangong Univ, Sch Elect & Informat Engn, Tianjin 300387, Peoples R China|Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

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catalytic mechanism; hydrogen evolution reaction; X-ray absorption spectroscopy; zero-valent single atoms;

Confining Zero-Valent Platinum Single Atoms in α-MoC_(1?x) for pH-Universal Hydrogen Evolution Reaction

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