Designing ultrahigh energy density and mass-loading of electrocatalysts for hydrogen evolution is highly desirable but remains a great challenge. Herein, a 3D high-rise architectural structure consisting of dense Ni(OH) nanoparticles on CuMoO nanocube heterostructure arrays on Ni foam (Ni(OH)/CuMoO/NF) is developed via a hydrothermal reaction, calcination and electrodeposition method. Benefitting from the optimized electronic configuration, hierarchical high-rise architecture, and large specific surface area and mesoporous, the Ni(OH)/CuMoO/NF exhibits superior hydrogen evolution reaction (HER) activity in 1.0 M KOH solution. Ni(OH)/CuMoO/NF only requires low overpotential of 70 mV achieving a current density of 10 mA cm with a low Tafel slope of 80 mV dec, and superior long-term stability toward HER. This work provides a new structural design to high-rise architectural structures for efficient catalytic application.

中文翻译：

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致密 Ni(OH)2 纳米颗粒负载 CuMoO4 纳米立方体异质结构阵列：一种高效的析氢电催化剂

设计用于析氢的超高能量密度和质量负载的电催化剂是非常理想的，但仍然是一个巨大的挑战。在此，通过水热反应、煅烧和电沉积方法开发了由泡沫镍上的 CuMoO 纳米立方异质结构阵列 (Ni(OH)/CuMoO/NF) 上致密 Ni(OH) 纳米颗粒组成的 3D 高层建筑结构。得益于优化的电子配置、分层高层结构、大比表面积和介孔，Ni(OH)/CuMoO/NF在1.0 M KOH溶液中表现出优异的析氢反应(HER)活性。 Ni(OH)/CuMoO/NF 仅需要 70 mV 的低过电势即可实现 10 mA cm 的电流密度和 80 mV dec 的低塔菲尔斜率，以及对 HER 的优异长期稳定性。这项工作为高层建筑结构提供了一种新的结构设计，以实现高效的催化应用。