一种用于析氢反应的高活性多孔MoS电极的电化学阳极氧化策略。
An electrochemical anodization strategy towards high-activity porous MoS electrodes for the hydrogen evolution reaction.
作者信息
Mao Xuerui, Xiao Tianliang, Zhang Qianqian, Liu Zhaoyue
机构信息
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University Beijing 100191 P. R. China
Key Laboratory of Micro-nano Measurement, Manipulation and Physics of Ministry of Education, School of Physics and Nuclear Energy Engineering, Beihang University Beijing 100191 P. R. China.
出版信息
RSC Adv. 2018 Apr 23;8(27):15030-15035. doi: 10.1039/c8ra01554f. eCollection 2018 Apr 18.
Molybdenum disulfide (MoS) is a promising non-precious metal electrocatalyst for the hydrogen evolution reaction (HER). Herein, we have described an anodization route for the fabrication of porous MoS electrodes. The active porous MoS layer was directly formed on the surface of a Mo metal sheet when it was subjected to anodization in a sulfide-containing electrolyte. The Mo sheet served as both a supporter for MoS electrocatalysts and a conductive substrate for electron transport. After optimizing the anodization parameters, the anodized MoS electrode showed a high electrocatalytic activity with an onset potential of -0.18 V ( RHE) for the HER, a Tafel slope of ∼101 mV per decade and an overpotential of 0.23 V at a current density of 10 mA cm for the HER. These results indicate that our facile anodization strategy is an efficient route towards a high-activity MoS electrode.
二硫化钼（MoS）是一种用于析氢反应（HER）的很有前景的非贵金属电催化剂。在此，我们描述了一种制备多孔MoS电极的阳极氧化路线。当Mo金属片在含硫化物的电解质中进行阳极氧化时，活性多孔MoS层直接在其表面形成。Mo片既是MoS电催化剂的载体，又是电子传输的导电基底。优化阳极氧化参数后，阳极氧化的MoS电极对HER表现出高电催化活性，起始电位为 -0.18 V（相对于可逆氢电极，RHE），塔菲尔斜率约为每十倍电流变化101 mV，在电流密度为10 mA cm²时HER的过电位为0.23 V。这些结果表明，我们简便的阳极氧化策略是制备高活性MoS电极的有效途径。
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