文献类型：期刊文献

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

作者：He, Chengkai[1];Wei, Yue[1];Xu, Jia[2];Wei, Yujie[1];Wang, Tao[1];Liu, Rongfei[3];Ji, Lvlv[1];Liu, Zhun[2];Wang, Sheng[1]

机构：[1]Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou 310018, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China;[3]Zhejiang Kangjiesi New Mat Technol Co LTD, Zhuji 311800, Peoples R China

年份：2023

外文期刊名：NANO RESEARCH

收录：SCI-EXPANDED(收录号：WOS:001093894700001)、、WOS

基金：This work was financially supported by Natural Science Foundation of Zhejiang Province (Nos. LQ20B030001 and LZ22C100002) and China Postdoctoral Science Foundation (No. 2021M702305).

语种：英文

外文关键词：hydrogen evolution reaction; transition metal dichalcogenides; carbon nanofibers; electrocatalysis; catalytic activity

外文摘要：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 mAcm-(2) in acidic and alkaline media, respectively. RuSe2 (111) is endowed with the more optimized Gibbs free energy of hydrogen adsorption (Delta G(H*)) 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.