Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media
Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media
复制标题
用于酸性介质中高效析氧反应的铬-钌氧化物固溶体电催化剂
DOI：
10.1038/s41467-018-08144-3
复制
发表时间：
2019-01-11
影响因子：
16.6
通讯作者：
Chen, Liang
中科院分区：
文献类型：
--
作者：
Lin, Yichao;Tian, Ziqi;Chen, Liang
开发具有活性、酸稳定性和低成本的析氧电催化剂是一项迫切而具有挑战性的工作。本文报道了一种不含铱、低铼含量的金属有机骨架氧化物材料（Cr0.6Ru0.4O2），该材料在酸性条件下具有显著的析氧反应性能。它在10 mA cm− 2下显示出178 mV的创纪录低过电位，并在0.5 M H2SO4溶液中以10 mA cm− 2的恒定电流进行10 h计时电位测试时保持了优异的性能。密度泛函理论计算进一步揭示了该催化剂优异的析氧反应性能的内在机理，突出了铬助剂对提高活性和稳定性的影响。
The development of active, acid-stable and low-cost electrocatalysts for oxygen evolution reaction is urgent and challenging. Herein we report an Iridium-free and low ruthenium-content oxide material (Cr0.6Ru0.4O2) derived from metal-organic framework with remarkable oxygen evolution reaction performance in acidic condition. It shows a record low overpotential of 178 mV at 10 mA cm−2and maintains the excellent performance throughout the 10 h chronopotentiometry test at a constant current of 10 mA cm−2in 0.5 M H2SO4solution. Density functional theory calculations further revealed the intrinsic mechanism for the exceptional oxygen evolution reaction performance, highlighting the influence of chromium promoter on the enhancement in both activity and stability.