分解水
兴奋剂
异质结
材料科学
过电位
氢
Atom(片上系统)
电解水
无机化学
电解
物理化学
光电子学
化学
光催化
电化学
电极
催化作用
电解质
生物化学
有机化学
计算机科学
嵌入式系统
作者
Xiuhui Li,Zhenchuan Niu,Mang Niu,Jiaxin Wang,Dapeng Cao,Xiaofei Zeng
出处
期刊:Small
[Wiley]
日期:2024-01-29
标识
DOI:10.1002/smll.202311335
摘要
Modulating the chemical composition and structure has been considered as one of the most promising strategies for developing high-efficient water splitting catalysts. Here, a single-atom Ru doped Ni2 P/Fe3 P catalyst is synthesized by introducing the dispersed Ru atoms to adjust Ni2 P/Fe3 P heterostructure. Single atom Ru provides effective hydrogen evolution reaction (HER) active sites for boosting catalytic activities. The catalyst with only 0.2 wt.% content of Ru exhibits an overpotential of 19.3 mV at 10 mA cm-2 , which is obviously lower than 146.1 mV of Ni2 P/Fe3 P. Notably, an alkaline overall water electrolyzer based on Ru-Ni2 P/Fe3 P catalysts achieves a cell voltage of 1.47 V and operates over 600 h at 10 mA cm-2 , which is superior to that of benchmark RuO2 //Pt/C (1.61 V). The theoretical calculations further confirm that Ru single atom doping can effectively optimize the hydrogen/water adsorption free energy of the active site and therefore improve the HER activity of heterostructure. This work provides a valuable reference to design high-activity and durability catalyst for water splitting through the double modulation of interface-effect and atomic doping.
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