氮掺杂超薄碳纳米片复合铂钌单原子合金催化剂的电化学析氢性能

为了减少贵金属的用量, 降低成本, 提高大规模生产的可能性, 构建单原子合金(SAA)是一个非常可行的解决方案. 设计了一种超小PtRu单原子合金物种均匀分散在掺氮超薄碳纳米片上的电催化剂(PtRu SAA/NC), 并通过基于同步辐射的X射线吸收精细结构(XAFS)光谱进行了结构确认. 与纯Ru团簇和氮掺杂的碳片相比, PtRu SAA/NC具有更高的析氢反应(HER)催化活性和特殊的稳定性, 在0.5 mol/L H₂SO₄溶液中进行HER时, 表现出较小的Tafel斜率(43 mV/dec), 且在10 mA/cm²电流密度下过电位仅为54 mV.

Nitrogen Doped Ultra-thin Carbon Nanosheet Composited Platinum-ruthenium Single Atom Alloy Catalyst for Promoting Electrochemical Hydrogen Evolution Process

In order to reduce the amount of precious metals， reduce costs and increase the possibility of large-scale production， the construction of single atom alloy（SAA） is a very feasible solution. Herein， an electrocatalyst with ultra-small PtRu single atom alloy species evenly dispersed on nitrogen doped ultra-thin carbon nanosheets（PtRu SAA/NC） was designed， and its structure was confirmed by synchrotron-radiation-based X-ray absorption fine structure（XAFS） spectroscopy. Compared with pure Ru clusters and nitrogen doped carbon sheets， the PtRu SAA/NC possesses higher hydrogen evolution reaction（HER） catalytic activity and exceptional stability， which exhibits a small Tafel slope of 43 mV/dec and a low overpotential of 54 mV at 10 mA/cm² during HER in 0.5 mol/L H₂SO₄ solution. The design of this low-cost and high-efficiency single atom alloy catalyst provides a new research direction for the development of clean energy structure conversion.