Lanfang Wang
(, ), Yujia Li
(, ), Yanqing Hao
(, ), Luyang Zuo
(, ), Jiahe Zhao
(, ), Wenjiao Liu
(, ), Hui Zhang
(, ), Yang Liu
(, ), Zhanwu Lei
(, ), Xiaohong Xu
(, )
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引用次数: 0
摘要
将钌单原子策略性地锚定在合适的载体上，可以深刻地调节其电子态，从而提高其析氢反应（HER）性能。本文通过一步水热合成方法，制备了Ru单原子和亚1 nm Ru簇锚定的非晶FeMoSx纳米片（记为Ru- fmsx）。通过调节亚1nm Ru簇与非晶FMSx之间的界面相互作用，可以有效地调节Ru的电子结构。这种调整降低了氢吸附和解吸的能量壁垒，促进羟基中间体的生成和释放，从而改善了HER的缓慢动力学。因此，Ru-FMSx电催化剂在10 mA cm−2的电流密度下，在碱性溶液中表现出34 mV的过电位，表现出显著的HER活性。此外，该电催化剂表现出优异的长期稳定性，在10毫安厘米−2的电流密度下保持200小时的稳定运行，法拉第制氢效率超过97%。优异的性能归功于材料内部独特的非晶结构和缩短的Mo-S和Fe-S键长。这一发现为设计和应用高效的非晶硫族化合物和单原子催化剂提供了一种简单的方法。
Modulating atomically precise Ru sites on amorphous chalcogenides for efficient hydrogen evolution reaction
The strategic anchoring of Ru single atoms on suitable supports can profoundly modulate its electronic state, thereby enhancing its hydrogen evolution reaction (HER) performance. Herein, Ru single atoms and sub-1 nm Ru clusters anchored amorphous FeMoSx (denoted as Ru-FMSx) nanosheets were developed through a one-step hydrothermal synthesis method. The electronic structure of Ru can be effectively tuned by regulating the interfacial interaction between the sub-1 nm Ru clusters and amorphous FMSx. This adjustment lowers the energy barriers for hydrogen adsorption and desorption, facilitating the generation and release of hydroxyl intermediates, thereby improving the sluggish kinetics of the HER. Thus, the Ru-FMSx electrocatalyst exhibits a significantly low overpotential of 34 mV in alkaline solution at a current density of 10 mA cm−2, demonstrating remarkable HER activity. Furthermore, this electrocatalyst shows an exceptional long-term stability, maintaining consistent operation for 200 h at a current density of 10 mA cm−2, with a Faradaic efficiency for hydrogen production exceeding 97%. The superior performance is attributed to the unique amorphous structure and the shortened bond length of Mo-S and Fe-S within the material. This discovery provides a straightforward method for designing and applying efficient amorphous chalcogenides and single atoms catalysts.
期刊介绍：
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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