WS <ce:inf loc='post'>2</ce:inf>/CoSe <ce:inf loc='post'>2</ce:inf> heterostructure: A designed structure as catalysts for enhanced hydrogen evolution performance

Sajjad Hussain; Kamran Akbar; Dhanasekaran Vikraman; Hailiang Liu; Seung-Hyun Chun; Jongwan Jung

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WS 2/CoSe 2 heterostructure: A designed structure as catalysts for enhanced hydrogen evolution performance

机译：WS 2 / COSE 2 异质结构：设计结构作为增强氢进化性能的催化剂

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The development of hydrogen-evolving catalysts based on transition metal dichalchogenides (TMDs) is receiving a great attention for practical application of water-splitting devices and fuel cells due to their high electrocatalytic activity. Herein, we synthesized tungsten disulfide (WS2)/cobalt diselenide (CoSe2) hybrid catalyst for hydrogen evolution reaction (HER). CoSe2films were first deposited via electrodeposition of Co and followed by selenization process. And, the surface of the synthesized CoSe2films was covered with WS2via combined process of sputtering and sulfurization. In acidic media, the WS2/CoSe2heterostructure catalyst exhibited fast hydrogen evolution kinetics of onset potential and Tafel slope were at 95mV and 44mVdecade?1, respectively with the excellent electrocatalytic stability over 20h. WS2/CoSe2heterostructure electrode demonstrates an excellent HER activity and long-term stability owing to their abundant active edge sites, and the strong chemical and electronic coupling between the CoSe2and WS2.

机译：基于过渡金属二甲基化合物（TMDS）的氢气进化催化剂的开发是由于其高电催化活性而产生的水分裂装置和燃料电池的实际应用。在此，我们合成用于氢进化反应（她）的钨二硫化钨（WS2）/钴烯丙烯酸酯（COSE2）杂化催化剂。首先通过CO的电沉积和硒化方法首先沉积COSE2FILMS。并且，合成的COSE2FILMS的表面被WS2VIA组合过程覆盖，溅射和硫化。在酸性介质中，WS2 / COSE2HETEROSSTRUCTION催化剂表现出发病潜力的快速氢进化动力学，TAFEL斜率分别为95mV和44mVDECADE？1，具有优异的电催化稳定性超过20h。 WS2 / COSE2HETEROSSTRUCTIONTURY电极显示出由于其丰富的主动边缘位点，以及COSE2和WS2之间的强化学和电子耦合而显着的她的活性和长期稳定性。

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来源
《Journal of industrial and engineering chemistry》 |2018年第2018期|共8页
作者
Sajjad Hussain; Kamran Akbar; Dhanasekaran Vikraman; Hailiang Liu; Seung-Hyun Chun; Jongwan Jung;
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作者单位

Graphene Research Institute Sejong University;

Department of Physics Sejong University;

Division of Electronics and Electrical Engineering Dongguk University-Seoul;

Graphene Research Institute Sejong University;

Department of Physics Sejong University;

Graphene Research Institute Sejong University;

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正文语种 eng
中图分类化学工业;
关键词
Hydrogen evolution reaction; Transitin metal dichalcogenide; Hybrid catalyst; Sputtering; CVD;

机译：氢气进化反应;转段金属二甲基化物;杂交催化剂;溅射;CVD;

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WS 2/CoSe 2 heterostructure: A designed structure as catalysts for enhanced hydrogen evolution performance

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