Yan Su, Chen Xiaojie, Li Weimo, Zhong Mengxiao, Xu Jiaqi, Xu Meijiao, Wang Ce, Pinna Nicola, Lu Xiaofeng
Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Department of Chemistry, IRIS Adlershof and the Center for the Science of Materials Berlin, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany.
Adv Sci (Weinh). 2024 Feb;11(7):e2307061. doi: 10.1002/advs.202307061. Epub 2023 Dec 10.
The realization of large-scale industrial application of alkaline water electrolysis for hydrogen generation is severely hampered by the cost of electricity. Therefore, it is currently necessary to synthesize highly efficient electrocatalysts with excellent stability and low overpotential under an industrial-level current density. Herein, Ir-incorporated in partially oxidized Ru aerogel has been designed and synthesized via a simple in situ reduction strategy and subsequent oxidation process. The electrochemical measurements demonstrate that the optimized Ru Ir -350 electrocatalyst exhibits outstanding hydrogen evolution reaction (HER) performance in an alkaline environment (1 M KOH). Especially, at the large current density of 1000 mA cm , the overpotential is as low as 121 mV, far exceeding the benchmark Pt/C catalyst. Moreover, the Ru Ir -350 catalyst also displays excellent stability over 1500 h at 1000 mA cm , denoting its industrial applicability. This work provides an efficient route for developing highly active and ultra-stable electrocatalysts for hydrogen generation under industrial-level current density.
碱性水电解制氢的大规模工业应用因电力成本而受到严重阻碍。因此，目前有必要合成在工业级电流密度下具有优异稳定性和低过电位的高效电催化剂。在此，通过简单的原位还原策略和后续氧化过程，设计并合成了掺入铱的部分氧化钌气凝胶。电化学测量表明，优化后的Ru Ir -350电催化剂在碱性环境（1 M KOH）中表现出出色的析氢反应（HER）性能。特别是在1000 mA cm 的大电流密度下，过电位低至121 mV，远远超过基准Pt/C催化剂。此外，Ru Ir -350催化剂在1000 mA cm 下1500 h以上也表现出优异的稳定性，表明其具有工业适用性。这项工作为开发在工业级电流密度下用于制氢的高活性和超稳定电催化剂提供了一条有效途径。
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