结晶度
过电位
析氧
无定形固体
材料科学
化学工程
溶解
催化作用
电解
电解水
磷化物
异质结
无机化学
化学
冶金
结晶学
物理化学
电极
镍
复合材料
电化学
有机化学
光电子学
工程类
电解质
作者
Wenbin Wang,Qunlei Wen,Danji Huang,Lin Yu,Nian-Dan Zhao,Lan Tang,Ming Li,Youwen Liu,Rongxing He
标识
DOI:10.1002/anie.202415132
摘要
The catalysts were always undergoing continuous amorphization and dissolution of active structure in operating condition, hindering the compatibility between stability and activity for oxygen evolution reaction (OER). Herein, we propose the selective adsorption of leached NO3‐ to strengthen the crystallinity and activity of surface reconstructed layer with amorphous and crystalline (a‐c) heterojunction. Taking a‐c Ni doped Fe2O(OH)3NO3·H2O (Ni‐FeNH) as a model precatalyst, we uncover that the leached NO3‐ are readily adsorbs on the crystalline phase in the formed a‐c Fe(Ni)OOH during OER, lowering the disorder degree and further activating Ni and Fe ion of the crystalline Fe(Ni)OOH on a‐c heterojunctions. Accordingly, Ni‐FeNH deliver a low overpotential of 303 mV and high durability of 500 hours at 500 mA cm‐2 for OER. Particularly, constructing industrial water electrolysis equipment exhibits high stability of 100 hours under a high operating current of 8000 mA.
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