Abstract Interface engineering is considered as an effective solution to fabricate efficient composite catalysts for water electrolysis. We implement a two-step electrodeposition method for designing hetero-interfaces of Co4S3 nanocrystals on NiCo layered double hydroxide (NiCo LDH) nanosheet arrays as electrocatalyst for hydrogen evolution. The interface constructing achieves improved hydrogen evolution catalysis by inducing lattice defects and distortions as active sites, and accelerating charge transfer and kinetics. The Co4S3-NiCo LDH/CC exhibits efficient catalysis performances with overpotential of 124 mV at 10 mA cm−2. This work provides not only advanced composite catalyst but also the facile and effective electrodeposition strategy for constructing hetero-interface electrocatalysts.

中文翻译：

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在 NiCo LDH 纳米片阵列上电沉积 Co4S3 以实现高级析氢

摘要 界面工程被认为是制备高效复合水电解催化剂的有效途径。我们实施了一种两步电沉积方法，用于在 NiCo 层状双氢氧化物 (NiCo LDH) 纳米片阵列上设计 Co4S3 纳米晶体的异质界面，作为析氢的电催化剂。界面构造通过将晶格缺陷和畸变作为活性位点并加速电荷转移和动力学来实现改进的析氢催化。Co4S3-NiCo LDH/CC 表现出高效的催化性能，在 10 mA cm-2 下的过电位为 124 mV。这项工作不仅提供了先进的复合催化剂，而且为构建异质界面电催化剂提供了简便有效的电沉积策略。