NiOx boosted Pt-shell for efficient hydrogen evolution reaction

被引：5
|
作者：
Kwofie, F. [1 ]
Cheng, Y. [1 ,2 ]
Zhang, R. [2 ,3 ]
Tang, H. [2 ,3 ,4 ]
机构：
[1] Cent South Univ, Sch Met & Environm, Dept Environm Engn, Changsha 410083, Peoples R China
[2] WHUT, Guangdong Hydrogen Energy Inst, Xianhu Hydrogen Valley, Foshan 528216, Peoples R China
[3] Guangdong Lab, Foshan Xianhu Lab Adv Energy Sci & Technol, Xianhu Hydrogen Valley, Foshan 528216, Peoples R China
[4] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源：
MATERIALS TODAY SUSTAINABILITY | 2022年 / 19卷
基金：
中国国家自然科学基金;
关键词：
NiOx@Ptelectrocatalyst; Synergisticeffect; Monolayer; Alkalinesolution; Acidelectrolyte; ACTIVE EDGE SITES; BIFUNCTIONAL ELECTROCATALYST; CARBON NANOTUBES; OXYGEN REDUCTION; NANOPARTICLES; GRAPHENE; ARRAY; MOS2; NANOSHEETS; OXIDATION;
D O I：
10.1016/j.mtsust.2022.100170
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The high-cost and the limited availability of Pt are the main barriers blocking the commercial application in electrochemical water splitting. Here, we found that Pt thin layers situated on nanostructured NiOx supported on graphene sheets show significantly higher activity for hydrogen evolution reaction (HER) in both acid and alkaline conditions. The NiOx could dramatically boost the HER activity of the on-top situated ultrathin Pt layer. The NiOx@Pt core-shell structure displays overpotentials of only 22 and 38.3 mV at 10 mA cm-2 for HER in alkaline and acid electrolytes, respectively, significantly lower than commercial Pt/C. The enhanced activity can be attributed to the monolayer nature of Pt and the bifunctional mechanism between the NiOx and Pt, which activate the Pt active sites by the NiOx sublayer. (c) 2022 Published by Elsevier Ltd.
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页数：11
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