过电位
氢氧化物
析氧
海水
插层(化学)
电解
催化作用
分解水
无机化学
化学工程
法拉第效率
腐蚀
材料科学
层状双氢氧化物
电解水
碱性水电解
化学
电化学
冶金
电极
电解质
地质学
光催化
物理化学
生物化学
海洋学
工程类
作者
Qi Hu,Kai Huang,Fenghongkang Pan,Ruijing Ma,Cheng Lian,Honglai Liu,Jun Hu
标识
DOI:10.1021/acs.iecr.3c03014
摘要
Hydrogen production by water splitting directly from seawater is of great significance, where electrocatalysts with both high electrocatalytic activity and chlorine corrosion resistance have been long sought after. Herein, intercalation of Mo(VI) ions in NiFe layered double hydroxide (LDH) was engineered for boosting the electrocatalytic oxygen evolution reaction (OER). The intercalated Mo(VI) with high valence states facilitated NiFe LDH self-reconstruction through inducing the formation of Ni3+ sites; meanwhile, its volumetric and electrostatic repulsion synergistically inhibited the catalyst corrosion through excluding Cl– from intercalation. As a result, the in situ growth of Mo0.25-NiFe LDH on Ni foam required an overpotential as low as 335 mV to deliver 500 mA cm–2 in alkaline natural seawater with excellent stability for at least 500 h, being one of the top electrocatalysts so far as we know. Therefore, this convenient intercalation engineering provided a promising strategy for seawater splitting.
科研通智能强力驱动
Strongly Powered by AbleSci AI