Ultrastable molybdenum disulfide-based electrocatalyst for hydrogen evolution in acidic media
文献类型：期刊论文
| 作者 | Zhao, Yunxing; Hwang, Jeemin; Tang, Michael T.; Chun, Hoje; Wang, Xingli; Zhao, Hu; Chan, Karen; Han, Byungchan; Gao, Pingqi; Li, Hong |
| 刊名 | JOURNAL OF POWER SOURCES
 |
| 出版日期 | 2020 |
| 卷号 | 456 |
| 关键词 | ACTIVE EDGE SITES SULFUR VACANCIES MOS2 NANOSHEETS EFFICIENT CATALYSTS GROWTH GRAPHENE FUEL DEFECTS SULFIDE |
| DOI | 10.1016/j.jpowsour.2020.227998 |
| 英文摘要 | Despite the incredible success in reducing the overpotential of nonprecious catalysts for acidic hydrogen evolution reaction (HER) in the past few years, the stability of most platinum-free electrocatalysts is still poor. Here, we report an ultrastable electrocatalyst for acidic HER based on two-dimensional (2D) molybdenum disulfide (MoS2) doped with trace amount of palladium (<5 mu g cm(-2)), which creates sulfur vacancies (S-vacancies). The optimized catalyst shows stable operation over 1000 h at 10 mA cm(-2) with overpotential of 106 mV. The MoS2 catalyst is stabilized on a defective vertical graphene support, where the strong interaction at the 2D-2D interface increases the adhesion between the catalyst and the support. Palladium (Pd) doping generates rich sulfur vacancies in MoS2 that have a twofold role: (1) increasing hydrogen adsorption energy, which enhances activity; and (2) further increasing the adhesion between graphene support and defective MoS2, and thus enhancing stability. Complementary theoretical studies reveal the reaction pathways for substitutional doping, where the Mo-vacancy sites are prior to be doped by Pd. Our work thus offers a strategy for making stable, efficient, and earth-abundant HER catalysts with strong potential to replace platinum for PEM electrolysis. |
| 学科主题 | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/19749]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Gao, PQ (corresponding author), Sun Yat Sen Univ, Sch Mat, Guangzhou 510275, Peoples R China. 2.Li, H (corresponding author), Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore. 3.Han, BC (corresponding author), Yonsei Univ, Dept Chem & Biomol Engn, Seoul 03722, South Korea. |
| 推荐引用方式 GB/T 7714 | Zhao, Yunxing,Hwang, Jeemin,Tang, Michael T.,et al. Ultrastable molybdenum disulfide-based electrocatalyst for hydrogen evolution in acidic media[J]. JOURNAL OF POWER SOURCES,2020,456. |
| APA | Zhao, Yunxing.,Hwang, Jeemin.,Tang, Michael T..,Chun, Hoje.,Wang, Xingli.,...&Li, Hong.(2020).Ultrastable molybdenum disulfide-based electrocatalyst for hydrogen evolution in acidic media.JOURNAL OF POWER SOURCES,456. |
| MLA | Zhao, Yunxing,et al."Ultrastable molybdenum disulfide-based electrocatalyst for hydrogen evolution in acidic media".JOURNAL OF POWER SOURCES 456(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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