磷化物
过电位
析氧
电催化剂
材料科学
夹
化学工程
镍
催化作用
无定形固体
分解水
纳米技术
电极
电化学
冶金
化学
复合材料
物理化学
有机化学
光催化
工程类
作者
Xinding Lv,Yan Li,Fei Deng,Haotong Li,Shutong Wan,Xue Han,Wanqi Zhang,Xia Tao
标识
DOI:10.1016/j.cej.2023.146128
摘要
Severe reconstruction of transition-metal phosphides occurring in the oxygen evolution reaction (OER) process suffers from catalyst activity and long-term stability challenges. Herein, we develop a facile preoxidation tactic to fabricate an amorphous NiPOx/Fe(OH)3 protective layer on the surface of NiP nanoarrays and investigate the effect of the NiPOx/Fe(OH)3 layer thickness on electrocatalytic OER performance. We find the optimized NiP@NiPOx/Fe(OH)3 electrode achieves a promising OER performance, with a low overpotential of 270.7 mV and an ultralong durability for 500 h at 500 mA cm−2, predominantly originating from the synergy of the highly conductive NiP core and the NiPOx/Fe(OH)3 layer. Post-OER characterizations demonstrate that the NiPOx/Fe(OH)3 layer protects NiP from oxidation during the OER process and thus avoids the severe reconstruction of NiP adverse to the catalyst stability. This work opens an avenue for enhancing OER performance in water splitting via rational control of surface reconstruction of metal phosphides at the desired point.
科研通智能强力驱动
Strongly Powered by AbleSci AI