首页|Chalcogen-dependent catalytic properties of RuX2(X=S/Se/Te)nanoparticles decorated carbon nanofibers for hydrogen evolution in acidic and alkaline media

Chalcogen-dependent catalytic properties of RuX2(X=S/Se/Te)nanoparticles decorated carbon nanofibers for hydrogen evolution in acidic and alkaline media

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Transition metal dichalcogenides(TMDs),with the general formula MX2(M=Mo/W/Fe/Co/Ni,etc.;X=S/Se/Te),have attracted extensive research interests for hydrogen evolution reaction(HER).Compared with numerous studies on noble-metal-free TMDs,the chalcogen-dependent HER catalytic properties of noble-metal-based TMDs are lack of sufficient research attention.Herein,a facile electrospinning-assisted synthetic strategy is proposed to synthesize ruthenium dichalcogenides(RuX2,X=S/Se/Te)nanoparticles decorated carbon nanofibers(CNFs).Benefiting from the identical nanofibrous morphology and exposed crystal planes of RuX2(111),the catalytic activities of RuX2@CNFs samples were investigated and compared in a fair and direct manner.Detailed electrochemical measurements coupled with density functional theory calculations were carried out to probe their intrinsic HER catalytic activities,resulting in the catalytic activity order of RuS2@CNFs＞RuSe2@CNFs＞RuTe2@CNFs in acidic media and that of RuS2@CNFs＞RuTe2@CNFs＞RuSe2@CNFs in alkaline media.The superior catalytic performance of RuS2@CNFs mainly stems from the relative lower HER energy barriers and thereby the higher intrinsic catalytic activity of RuS2(111),leading to ultralow overpotentials of 44 and 9 mV at 10 mA·cm-2 in acidic and alkaline media,respectively.RuSe2(111)is endowed with the more optimized Gibbs free energy of hydrogen adsorption(ΔGH*)than RuTe2(111),but RuTe2(111)shows enhanced catalytic property for H2O dissociation and OH-desorption than RuSe2(111),therefore,resulting in the altered catalytic activity sequences for RuSe2 and RuTe2 in acidic and alkaline media.

hydrogen evolution reactiontransition metal dichalcogenidescarbon nanofiberselectrocatalysiscatalytic activity

Chengkai He、Yue Wei、Jia Xu、Yujie Wei、Tao Wang、Rongfei Liu、Lvlv Ji、Zhun Liu、Sheng Wang

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School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China

Department of Physics,Shaoxing University,Shaoxing 312000,China

Zhejiang Kangjiesi New Material Technology Co.,LTD,Zhuji 311800,China

Natural Science Foundation of Zhejiang ProvinceNatural Science Foundation of Zhejiang ProvinceChina Postdoctoral Science Foundation

LQ20B030001LZ22C1000022021M702305

2024

10.1007/s12274-023-6206-9

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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