Developing efficient non‐noble and earth‐abundant hydrogen‐evolving electrocatalysts is highly desirable for improving the energy efficiency of water splitting in base. Molybdenum disulfide (MoS₂) is a promising candidate, but its catalytic activity is kinetically retarded in alkaline media due to the unfavorable water adsorption and dissociation feature. A heterogeneous electrocatalyst is reported that is constructed by selenium‐doped MoS₂ (Se‐MoS₂) particles on 3D interwoven cobalt diselenide (CoSe₂) nanowire arrays that drives the hydrogen evolution reaction (HER) with fast reaction kinetics in base. The resultant Se‐MoS₂/CoSe₂ hybrid exhibits an outstanding catalytic HER performance with extremely low overpotentials of 30 and 93 mV at 10 and 100 mA cm^–2 in base, respectively, which outperforms most of the inexpensive alkaline HER catalysts, and is among the best alkaline catalytic activity reported so far. Moreover, this hybrid catalyst shows exceptional catalytic performance with very low overpotentials of 84 and 95 mV at 10 mA cm^–2 in acidic and neutral electrolytes, respectively, implying robust pH universality of this hybrid catalyst. This work may provide new inspirations for the development of high‐performance MoS₂‐based HER electrocatalysts in unfavorable basic media for promising catalytic applications.

中文翻译：

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交织的CoSe2纳米线阵列上由Se掺杂的二硫化钼颗粒制成的高度耐用的非贵族碱性氢析出电催化剂

对于提高碱中水分解的能效，开发高效的非贵重和富地球的析氢电催化剂是非常必要的。二硫化钼（MoS ₂）是一种有前途的候选物，但由于不利的水吸附和解离特性，其催化活性在碱性介质中在动力学上受到阻碍。据报道，一种非均相的电催化剂是通过在3D交织的二硒化钴（CoSe ₂）纳米线阵列上掺杂硒的MoS ₂（Se-MoS ₂）颗粒构造的，该催化剂可驱动氢释放反应（HER），并具有快速的反应动力学。生成的Se-MoS ₂ / CoSe ₂混合动力汽车具有出色的催化HER性能，在10和100 mA cm ^–2的碱中过低的过电势分别为30和93 mV ，胜过大多数廉价的碱性HER催化剂，并且是迄今为止报道的最佳碱性催化活性之一。此外，该杂化催化剂显示出优异的催化性能，在酸性和中性电解液中在10 mA cm ^–2时的过电势极低，分别为84和95 mV ，这意味着该杂化催化剂具有强大的pH通用性。这项工作可能会为在有前景的催化应用中在不利的碱性介质中开发高性能的基于MoS ₂的HER电催化剂提供新的灵感。