期刊
ACS NANO
卷 14, 期 9, 页码 12184-12194出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c05874
关键词
ReSe2; transition metal doping; adatoms; hydrogen evolution reaction; first-principles calculation
类别
资金
- Ministry of Science and ICT at Korea [2014R1A6A1030732, 2017K000494, 2020R1A2C2004392]
- [C030440]
- [KSC-2019-CRE-0131]
- National Research Foundation of Korea [2015-DD-RD-0067-06] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Two-dimensional Re dichalcogenide nanostructures are promising electrocatalysts for the hydrogen evolution reaction (HER). Herein, we report the adatom doping of various transition metals (TM = Mn, Fe, Co, Ni, and Cu) in ReSe2 nanosheets synthesized using a solvothermal reaction. As the atomic number of TM increases from Mn to Cu, the adatoms on Re sites become more favored over the substitution. In the case of Ni, the fraction of adatoms reaches 90%. Ni doping resulted in the most effective enhancement in the HER catalytic performance, which was characterized by overpotentials of 82 and 109 mV at 10 mA cm(-2) in 0.5 M H2SO1 and 1 M KOH, respectively, and the Tafel slopes of 54 and 81 mV dec(-1). First-principles calculations predicted that the adatom doping structures (TMs on Re sites) have higher catalytic activity compared with the substitution ones. The adsorbed H atoms formed a midgap hybridized state via direct bonding with the orbitals of TM adatom. The present work provides a deeper understanding into how TM doping can provide the catalytically active sites in these ReSe2 nanosheets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据