Abstract Molybdenum diselenide (MoSe2) has been considered as a promising electrocatalyst for the hydrogen evolution reaction (HER), having great significance in the exploration of catalysts for green energy production. To obtain excellent electrocatalytic properties of MoSe2, the structural design of materials has become a commonly-used strategy. Hence, the combination of hexadecyl trimethyl ammonium bromide (CTAB) and polyethylene-polypropylene glycol (F68) was employed during hydrothermal process to modify the structure of MoSe2. Compared with using only one surfactant (CTAB or F68), MoSe2 catalyst represents better surface activity, more active sites and enhanced catalytic activity in the presence of dual surfactants. The as-prepared MoSe2-CTAB@F68 catalyst achieves an excellent HER activity with an overpotential of 189 mV versus the reversible hydrogen electrode (RHE) at a current density of 10 mA cm-2 and a low Tafel slope of 62 mV dec-1. Therefore, this work paves a way to prepare electrocatalysts with dual surfactants existence, which is greatly attractive for an optimizing electrocatalyst performance in a more efficient way.

中文翻译：

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双表面活性剂用于高效析氢反应合成MoSe2

摘要 二硒化钼（MoSe2）被认为是一种很有前途的析氢反应（HER）电催化剂，在探索绿色能源生产催化剂方面具有重要意义。为了获得 MoSe2 优异的电催化性能，材料的结构设计已成为常用的策略。因此，在水热过程中采用十六烷基三甲基溴化铵 (CTAB) 和聚丙二醇 (F68) 的组合来修饰 MoSe2 的结构。与仅使用一种表面活性剂（CTAB 或 F68）相比，MoSe2 催化剂在双表面活性剂存在下表现出更好的表面活性、更多的活性位点和增强的催化活性。所制备的 MoSe2-CTAB@F68 催化剂在 10 mA cm-2 的电流密度和 62 mV dec-1 的低塔菲尔斜率下实现了优异的 HER 活性，相对于可逆氢电极 (RHE) 的过电位为 189 mV . 因此，这项工作为制备具有双表面活性剂存在的电催化剂铺平了道路，这对于以更有效的方式优化电催化剂性能具有极大的吸引力。