Li Daohao, Cai Rongsheng, Zheng Dongyong, Ren Jun, Dong Chung-Li, Huang Yu-Cheng, Haigh Sarah J, Liu Xien, Gong Feilong, Liu Yiming, Liu Jian, Yang Dongjiang
State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, School of Environmental Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao, 266071, P. R. China.
Department of Materials, University of Manchester, Manchester, M13 9PL, UK.
Adv Sci (Weinh). 2024 Jun;11(22):e2309869. doi: 10.1002/advs.202309869. Epub 2024 Mar 28.
Ruthenium (Ru) is a promising electrocatalyst for the hydrogen evolution reaction (HER), despite suffering from low activity in non-acidic conditions due to the high kinetic energy barrier of HO dissociation. Herein, the synthesis of carbon nanosheet-supported RuP/Ru heterostructures (RuP/Ru@CNS) from a natural polysaccharide is reported and demonstrates its behavior as an effective HER electrocatalyst in non-acidic conditions. The RuP/Ru@CNS exhibits low overpotential (106 mV at 200 mA·cm) in alkaline electrolyte, exceeding most reported Ru-based electrocatalysts. The electron shuttling between Ru atoms at the RuP/Ru interface results in a lowered energy barrier for HO dissociation by electron-deficient Ru atoms in the pure Ru phase, as well as optimized H adsorption of electron-gaining Ru atoms in the neighboring RuP. A low H spillover energy barrier between Ru atoms at the RuP/Ru interface further boosts HER kinetics. This study demonstrates a sustainable method for the fabrication of efficient Ru-based electrocatalysts and provides a more detailed understanding of interface effects in HER catalysis.
钌（Ru）是一种很有前景的析氢反应（HER）电催化剂，尽管由于HO解离的高动能垒，在非酸性条件下活性较低。本文报道了由天然多糖合成碳纳米片负载的RuP/Ru异质结构（RuP/Ru@CNS），并证明了其在非酸性条件下作为有效HER电催化剂的性能。RuP/Ru@CNS在碱性电解质中表现出低过电位（200 mA·cm时为106 mV），超过了大多数已报道的Ru基电催化剂。RuP/Ru界面处Ru原子之间的电子穿梭导致纯Ru相中缺电子Ru原子的HO解离能垒降低，以及相邻RuP中得电子Ru原子的H吸附优化。RuP/Ru界面处Ru原子之间的低H溢流能垒进一步促进了HER动力学。本研究展示了一种制备高效Ru基电催化剂的可持续方法，并为HER催化中的界面效应提供了更详细的理解。
