Promoting mechanism of the Ru-integration effect in RuCo bimetallic nanoparticles for enhancing water splitting performance  

作　　者：Mengtian Huo Yifan Li Qianyu Li Xinye Zhang Xinran Sun Huiying Wang Zihao Xing Jinfa Chang 

机构地区：[1]Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education,Faculty of Chemistry,Northeast Normal University,Changchun 130024,China

出　　处：《Nano Research》2025年第3期82-89,共8页纳米研究(英文版)

基　　金：supported by National Natural Science Foundation of China(Nos.22472023,22202037 and 22102105);the Fundamental Research Funds for the Central Universities(Nos.2412024QD014 and 2412023QD019);This work was also supported by the Science and Technology Development Plan Project of Jilin Province,China(No.20240101192JC).

摘　　要：The development of electrocatalysts for oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)is crucial for sustainable energy and environmental initiatives.This work establishes an atomically-dispersed Ru-based model to investigate the promoting mechanism by the Ru-Integration effect in RuCo bimetallic nanoparticles supported on nitrogen-doped carbon(RuCo@NC).Specially,the Ru content in RuCo@NC plays a vital role for both HER and OER.The optimized catalyst shows an outstanding performance,requiring only 217 and 97 mV overpotential to reach a current density of 10 mA·cm^(−2)for OER and HER respectively in alkaline conditions.Combined with advanced characterizations such as spherical aberration-corrected scanning transmission electron microscopy,X-ray absorption spectroscopy,in-situ Raman spectroscopy,and density functional theory calculations,it is found that Ru plays multiple crucial roles:(1)Ru restricts the growth of large Co NPs,while the small-sized Co NPs facilitate the formation of carbon nanotubes,which significantly enhances the mass/electron transfer;(2)Ru not only tunes the surface properties of Co but also acts as an active site for HER.As a result,when using RuCo@NC as an overall water splitting catalyst,it only needs a potential of 1.62 V to reach a current density of 100 mA·cm^(−2).This work offers valuable insights into designing Ru-based electrocatalysts for water splitting.

关 键 词：RuCo bimetal water splitting promoting mechanism integration effect in-situ Raman spectra 

分 类 号：O64[理学—物理化学]