Flexible bifunctional electrocatalyst (Ni@(Ni,Fe)Se_(2)/Ni@CC) by adjusting d-band center for high-efficiency HER and overall water splitting  

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作  者:Wenbo Liao Baojie Zhang Lan Mu Ning Zhao Gang Zhao Junjie Huang Xijin Xu 

机构地区:[1]School of Physics and Technology,University of Jinan,Jinan 250022,China

出  处:《ChemPhysMater》2024年第3期320-328,共9页化学物理材料(英文)

基  金:funded by the National Natural Science Foundation of China.(No.51802177);Joint Funds of the National Natural Science Foundation of China(No.U22A20140);Jinan City-School Integration Development Strategy Project(No.JNSX2023015);University of Jinan Disciplinary Cross-Convergence Construction Project 2023(No.XKJC-202309)。

摘  要:Nickel foam is widely used as a collector for electrocatalysts because of its excellent electrical conductivity;however,it is prone to react with elements such as oxygen,sulfur,and phosphorus during the growth of electrode materials,which makes it brittle and fragile,thus limiting its large-scale application.In this study,bifunctional electrocatalysts with flexible multilevel Ni-based nanoclusters Ni@(Ni,Fe)Se_(2)/Ni@CC were synthesized on carbon cloth(CC)by hydrothermal and electrodeposition methods;these flexible electrocatalysts are convenient for subsequent industrial applications.At a current density of 10 mA cm^(−2),the overpotentials of the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)reached 98 and 224 mV,respectively,exceeding the catalytic effects of most metal-based collectors.The overall water-splitting potential of the catalyst was only 1.56 V at 10 mA cm^(−2),and the performance was maintained after a 24 h stability test.Ni@(Ni,Fe)Se_(2)/Ni@CC significantly improved the activity in alkaline environments by modulating the center of the d-band,thereby increasing the adsorption capacity of the catalyst for H ions.In this study,we improved the intrinsic activity and charge transfer of transition metal electrocatalysts by modifying the carbon cloth and constructing multilevel Ni-based nanoclusters,which provided some insights into the rational design of flexible bifunctional electrocatalysts.

关 键 词:Flexible bifunctional electrocatalysts Nickel-based nanoclusters Multilevel architecture HER Overall water splitting 

分 类 号:O64[理学—物理化学]

 

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