Du Hongfang, He Song, Li Boxin, Wang Ke, Zhou Zhenkai, Li Junhui, Wang Tingfeng, Du Zhuzhu, Ai Wei, Huang Wei
Frontiers Science Center for Flexible Electronics & Shaanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China.
Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Key Laboratory of Flexible Electronics, Fujian Normal University and Strait Laboratory of Flexible Electronics (SLoFE), Fuzhou 350117, China.
Angew Chem Int Ed Engl. 2025 Mar 17;64(12):e202422393. doi: 10.1002/anie.202422393. Epub 2024 Dec 17.
Designing high-performance electrocatalysts with superior catalytic activity and stability is essential for large-scale hydrogen production via water electrolysis. Heterostructure nanoarrays are promising candidates, though achieving both high activity and stability simultaneously, especially under high current densities, remains challenging. To this end, we have developed a cascade reaction process that constructs a series of heterostructure nanoarrays with rich heterointerfaces. This process involves treating nickel foam (NF) with molten KSCN and transition metal salts. Initially, NF reacts with KSCN to form NiS nanoarrays and S ions, which are subsequently captured by transition metal ions to form sulfides that are directly integrated onto the nanoarrays, resulting in abundant heterointerfaces. Both experimental and theoretical results indicate that these rich heterointerfaces significantly enhance the interfacial interaction between NiS and RuS within the nanoarrays (termed RH-NiS/RuS), markedly improving both the intrinsic activity and stability for the hydrogen evolution reaction (HER). Impressively, the RH-NiS/RuS demonstrates exceptional HER performance, achieving a low overpotential of just 180 mV at 1000 mA cm and maintaining stability for up to 500 h under such high-current-density conditions. This innovative approach paves the way for the interfacial design and synthesis of high-performance catalysts for ampere-level hydrogen production.
设计具有卓越催化活性和稳定性的高性能电催化剂对于通过水电解大规模制氢至关重要。异质结构纳米阵列是很有前景的候选材料，然而要同时实现高活性和稳定性，尤其是在高电流密度下，仍然具有挑战性。为此，我们开发了一种级联反应过程，构建了一系列具有丰富异质界面的异质结构纳米阵列。该过程包括用熔融的KSCN和过渡金属盐处理泡沫镍（NF）。最初，NF与KSCN反应形成NiS纳米阵列和S离子，随后这些S离子被过渡金属离子捕获形成硫化物，这些硫化物直接整合到纳米阵列上，从而产生大量的异质界面。实验和理论结果均表明，这些丰富的异质界面显著增强了纳米阵列中NiS和RuS之间的界面相互作用（称为RH-NiS/RuS），显著提高了析氢反应（HER）的本征活性和稳定性。令人印象深刻的是，RH-NiS/RuS表现出卓越的HER性能，在1000 mA cm时过电位低至180 mV，并且在如此高电流密度条件下可保持稳定性长达500小时。这种创新方法为安培级制氢的高性能催化剂的界面设计和合成铺平了道路。
