过电位
塔菲尔方程
钌
电催化剂
析氧
金属有机骨架
材料科学
催化作用
化学工程
电子结构
吸附
无机化学
纳米技术
物理化学
化学
计算化学
电化学
有机化学
电极
工程类
作者
Yuwen Li,Yuhang Wu,Tongtong Li,Mengting Lu,Yi Chen,Yuanjing Cui,Junkuo Gao,Guodong Qian
摘要
Abstract The establishment of efficient oxygen evolution electrocatalysts is of great value but also challenging. Herein, a durable metal–organic framework (MOF) with minor atomically dispersed ruthenium and an optimized electronic structure is constructed as an efficient electrocatalyst. Significantly, the obtained NiRu 0.08 ‐MOF with doping Ru only needs an overpotential of 187 mV at 10 mA cm −2 with a Tafel slop of 40 mV dec −1 in 0.1 M KOH for the oxygen evolution reaction, and can work continuously for more than 300 h. Ultrahigh Ru mass activity is achieved, reaching 56.7 A g −1 Ru at an overpotential of 200 mV, which is 36 times higher than that of commercial RuO 2 . X‐ray adsorption spectroscopy and density function theory calculations reveal that atomically dispersed ruthenium on metal sites in MOFs is expected to optimize the electronic structure of nickel sites, thus improving the conductivity of the catalyst and optimizing the adsorption energy of intermediates, resulting in significant optimization of electrocatalytic performance. This study could provide a new avenue for the design of efficient and stable MOF electrocatalysts.
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