双功能
电催化剂
催化作用
材料科学
电化学
化学工程
合金
纳米棒
化学
纳米技术
电极
冶金
物理化学
有机化学
工程类
作者
Fei Gu,Qing Zhang,Xiaohong Chen,Ting Li,Hong Fu,Hong Qun Luo,Nian Bing Li
标识
DOI:10.1016/j.ijhydene.2022.06.148
摘要
Constructing efficient and stable bifunctional electrocatalysts for overall water splitting remains a challenge because of the sluggish reaction kinetics. Herein, the core-shell hybrids composed of Co(PO3)2 nanorod core and NiFe alloy shell in situ grown on nickel foam (NiFe/Co(PO3)2@NF) are synthesized. Owing to the hierarchical palm-leaf-like structures and strong adhesion between NiFe alloys, Co(PO3)2 and substrates, the catalyst provides a large surface area and rapid charge transfer, which facilitates active sites exposure and conductivity enhancement. The interfacial effect in the NiFe/Co(PO3)2 core-shell structure modulates the electronic structure of the active sites around the boundary, thereby boosting the intrinsic activity. Benefiting from the stable structure, the durability of the catalyst is not impaired by the inevitable surface reconfiguration. The NiFe/Co(PO3)2@NF electrode presents a low cell voltage of 1.63 V to achieve 10 mA cm−2 and manifests durability for up to 36 h at different current densities.
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