过电位
双功能
催化作用
分解水
电化学
纳米线
电解质
材料科学
贵金属
热液循环
电催化剂
化学工程
镍
过渡金属
无机化学
化学
纳米技术
电极
物理化学
冶金
光催化
有机化学
工程类
作者
Fayin Yu,Rui Wang,Jiang Qu,Pengyu Hu,Tengzuo Huang,Yao Zhou,Rongfei Wang,Anran Chen,Yang Jin,Tao Sun
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-09-28
卷期号:6 (19): 10038-10047
标识
DOI:10.1021/acsaem.3c01625
摘要
For highly efficient water-splitting techniques, excellent catalytic activities of noble metal catalysts originate from their material properties, while nonprecious metal catalysts depend on their structural modulation as well as larger exposure zones with more active sites for exhibiting excellent catalytical ability. In this work, we prepared a bramble-like three-dimensional NiCo2S4 nano thorn array homogeneously grown on a nanowire array as precursors and adopted nickel foam as a carrier via a facile hydrothermal method. Owing to its 3D bramble nanowire structure with quick electron transfer ability and larger exposure active sites, this NiCo2S4 composite with dual nanowires exhibited efficient bifunctional catalytic activity and good stability in the electrocatalytic process. It showed remarkable catalytic activity in decomposition water and outputted an HER overpotential at 86 mV at the present density of 10 mA cm–2 as well as an OER overpotential of 203 mV in an alkaline solution. In addition, the unique 3D composited catalyst showed good stability in 1.0 M NaOH solution electrolyte solution and has 72 h with 5000 consecutive cycles without decay at a fixed current density of 10 mA cm–2. This work might introduce some ideas for the development of transition metal sulfides in the electrochemical breakdown of water and supply a preparation strategy for enlarging the catalytic activities of nonprecious metal catalysts by simply modifying their microstructure.
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