Zhang Jiachen, Chen Guangbo, Liu Qicheng, Fan Chuang, Sun Dongmei, Tang Yawen, Sun Hanjun, Feng Xinliang
Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
Center for Advancing Electronics Dresden (cfaed), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstr. 4, 01062, Dresden, Germany.
Angew Chem Int Ed Engl. 2022 Sep 26;61(39):e202209486. doi: 10.1002/anie.202209486. Epub 2022 Aug 24.
Ruthenium (Ru) has been theoretically considered a viable alkaline hydrogen evolution reaction electrocatalyst due to its fast water dissociation kinetics. However, its strong affinity to the adsorbed hydroxyl (OH ) blocks the active sites, resulting in unsatisfactory performance during the practical HER process. Here, we first reported a competitive adsorption strategy for the construction of SnO nanoparticles doped with Ru single-atoms supported on carbon (Ru SAs-SnO /C) via atomic galvanic replacement. SnO was introduced to regulate the strong interaction between Ru and OH by the competitive adsorption of OH between Ru and SnO , which alleviated the poisoning of Ru sites. As a consequence, the Ru SAs-SnO /C exhibited a low overpotential at 10 mA cm (10 mV) and a low Tafel slope of 25 mV dec . This approach provides a new avenue to modulate the adsorption strength of active sites and intermediates, which paves the way for the development of highly active electrocatalysts.
钌（Ru）由于其快速的水解离动力学，在理论上被认为是一种可行的碱性析氢反应电催化剂。然而，它对吸附的羟基（OH ）具有很强的亲和力，会阻塞活性位点，导致在实际析氢反应过程中性能不尽人意。在此，我们首次报道了一种通过原子自发置换构建碳负载的钌单原子掺杂的二氧化锡纳米颗粒（Ru SAs-SnO /C）的竞争吸附策略。引入二氧化锡以通过Ru和二氧化锡之间对OH的竞争吸附来调节Ru与OH之间的强相互作用，从而减轻Ru位点的中毒。结果，Ru SAs-SnO /C在10 mA cm 时表现出低过电位（10 mV）和25 mV dec 的低塔菲尔斜率。这种方法为调节活性位点和中间体的吸附强度提供了一条新途径，为高活性电催化剂的开发铺平了道路。
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