Heterostructures with multiple electrocatalytically active components to simultaneously satisfy electrochemical and structural requirements have recently been regarded as materials with high catalytic activity in the hydrogen evolution reaction (HER). Herein, hybrid structures of CoS₂/SnO₂@MoS₂ (CSM1) nanocubes are synthesized via a fast template-engaged hydrothermal treatment employing perovskite hydroxide CoSn(OH)₆ nanocubes as precursor templates. The self-template strategy has the ability to construct samples with a multicomponent structure, including highly catalytically active components of CoS₂ and MoS₂ as well as highly conductive SnO₂, with a porous interior. Benefiting from the merits of appropriate composition and well-retained porous nanocube structure, the CSM1 nanocubes exhibit the HER performance with a desired overpotential of 196 mV at a current density of 10 mA cm⁻², a small Tafel slope of 69 mV dec⁻¹ and long-time stability in acidic media. This protocol sheds light on designing a rational structure with prominent electrocatalytic activity and stability in energy-related applications.

中文翻译：

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合成CoS2 / SnO2 @ MoS2纳米立方异质结构以实现在酸性介质中增强的电催化氢释放

具有多种电催化活性组分以同时满足电化学和结构要求的异质结构最近被认为是在析氢反应（HER）中具有高催化活性的材料。在这里，CoS ₂ / SnO ₂ @MoS ₂（CSM1）纳米立方体的杂化结构是通过使用钙钛矿氢氧化物CoSn（OH）₆纳米立方体作为前体模板的快速模板接合水热处理来合成的。自我模板策略能够构建具有多组分结构的样品，包括多催化活性的CoS ₂和MoS ₂组分以及高导电性SnO ₂，内部多孔。得益于适当组成和良好保留的多孔纳米立方体结构的优点，CSM1纳米立方体在10 mA cm ^-2的电流密度，69 mV dec ^-1的小Tafel斜率下表现出196 mV的期望超电势的HER性能。和在酸性介质中的长期稳定性。该协议为设计合理的结构提供了重要的电催化活性，并在能源相关应用中具有稳定性。