磷化物
材料科学
镍
催化作用
异质结
化学工程
吸附
兴奋剂
过渡金属
氢
纳米技术
无机化学
冶金
光电子学
物理化学
化学
工程类
有机化学
生物化学
作者
Yu Ma,Ning Yu,Luyao Li,Meng-Xuan Li,Jingyi Xie,Xin Liu,Youhe Wang,Yong‐Ming Chai,Bin Dong
标识
DOI:10.1016/j.jallcom.2023.168883
摘要
Transition metal-based hydroxides for hydrogen evolution reaction (HER) are generally limited by inherent poor activity and low electrical conductivity. The rational design of heterostructures to optimize electronic structure has become an effective approach to enhance the catalytic activity. Herein, Ga-doped nickel phosphide was successfully constructed on the surface of Ni(OH)2 by simple electrodeposition and subsequent low-temperature phosphating treatment, harvesting a unique 3D nanoflower-cluster heterostructure (GaNiP/Ni(OH)2). The porous ultrathin nanopetal formed by the interposition of Ga not only combines good conductivity and abundant active sites, but also possesses super-hydrophilicity, which greatly promotes the release of bubbles during HER process and facilitates the exposure of active sites. More importantly, Ni atoms in Ni5P4 are partly replaced by Ga resulting in electron rearrangement, optimizing Had adsorption energy. Therefore, GaNiP/Ni(OH)2 shows the outstanding HER performance, delivering current densities of 10 and 100 mA·cm−2 with just 70 and 141 mV overpotentials (test condition: 60 °C), respectively, accompanied by superior durability (500 h at room temperature and 150 h at 60 °C). This work provides a facile controllable and promising structural coupling method for the synthesis of HER materials with unique structures.
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