析氧
海水
电解
催化作用
化学
双功能
电解水
分解水
离解(化学)
无机化学
氧气
电化学
化学工程
电极
电解质
有机化学
物理化学
生态学
工程类
生物
光催化
作者
Deqiang Kong,Chao Meng,Yanmin Wang,Xuemin Chen,Jialin Zhang,Laishi Zhao,Jianglong Ji,Liang Zhang,Yongqiang Zhou
标识
DOI:10.1016/j.apcatb.2023.123578
摘要
Promoting the activated oxygen formation and the accessible site density is crucial for boosting the mass and price activity of Ru in water/seawater electrolysis. However, a rational catalyst architecture is lacking to satisfy the above requirements. Herein, Ru was intentionally embedded into few-layer Co3O4 (Ru-Co3O4) to construct high-density accessible RuOCo moieties for water/seawater splitting. The moiety structure accelerates the generation and dissociation of activated H2O during hydrogen evolution reaction (HER), and ensures the rapid evolution of key "activated oxygen" species in oxygen evolution reaction (OER), thus improving HER/OER intrinsic kinetics. Besides, these moieties embedded within few-layer structure effectively promote site formation and utilization. Consequently, compared with Ru/C and Pt/C, an order of magnitude increase in mass and price activity was achieved for bifunctional HER/OER. When applied in an anion-exchange-membrane (AEM) electrolyzer, this catalyst realizes industrial-level current densities for freshwater and seawater electrolysis, more than twice than Ru/C(+)||Pt/C(−), and robust durability.
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