A Sustainable Route to Ruthenium Phosphide (RuP)/Ru Heterostructures with Electron‐Shuttling of Interfacial Ru for Efficient Hydrogen Evolution

作者：Daohao Li, Rongsheng Cai, Dongyong Zheng, Jun Ren, Chung‐Li Dong, Yucheng Huang, Sarah J. Haigh, Xien Liu, Feilong Gong, Yiming Liu, Jian Liu, Dongjiang Yang · 发表于：Advanced Science · 年份：2024 · DOI：10.1002/advs.202309869 · 被引用次数：50 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Fuel Cells and Related Materials

Abstract 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 H 2 O 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 −2 ) 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 H 2 O 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.