电催化剂
双功能
合金
催化作用
材料科学
电解质
分解水
无机化学
氢
碳纤维
化学工程
过渡金属
纳米技术
化学
电极
电化学
冶金
物理化学
复合材料
有机化学
工程类
复合数
光催化
作者
Guohua Li,Zhaoyan Zhang,Wenning Liu,Wei Yang,Li An,Dan Qu,Yichang Liu,Xiayan Wang,Zaicheng Sun
标识
DOI:10.1007/s40843-022-2403-1
摘要
The development of highly efficient and low-cost electrocatalysts for hydrogen production through water splitting is extremely crucial and challenging. The introduction of transition metals to precious metals to form alloy electrocatalysts has been considered an effective strategy for regulating the electronic structure and catalytic properties. Moreover, particle size reduction is also a method for achieving effective electrocatalysts. In this study, we developed a simple two-step method for synthesizing ultra-small carbon-supported FeRu alloy nanoparticles. The bifunctional Fe0.05Ru0.05/XC-72 electrocatalyst with a diameter of 2.1 nm exhibited excellent activity and durability in alkaline fresh water and seawater electrolytes. The Fe0.05Ru0.05/XC-72 electrocatalyst required overpotentials of 13, 15, and 18 mV at a current density of 10 mA cm−2 in 1 mol L−1 KOH, 1 mol L−1 KOH + 0.5 mol L−1 NaCl, and 1 mol L−1 KOH + seawater, respectively. The Fe0.05Ru0.05/XC-72 electrocatalyst achieved a mass activity of 11.32 $${\rm{A}}\,{\rm{m}}{{\rm{g}}^{ - 1}}_{{\rm{noble}}\,\,{\rm{metal}}}$$ at −0.07 V vs. reversible hydrogen electrode in 1 mol L−1 KOH. Moreover, the Fe0.05Ru0.05/XC-72 electrocatalyst exhibited long-term hydrogen evolution reaction (HER) stability over 24 h in 1 mol L−1 KOH. Theoretical calculations indicate that the FeRu alloy could induce an electronic effect, leading to stronger *H adsorption ability and enhancing the HER performance. This study presents a promising approach for the future fabrication of excellent Ru-based electrocatalysts with high electroactivity and stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI