Dispersing precious metal oxide nanoparticles on a support is a promising catalyst modification strategy for the oxygen evolution reaction in acidic media,but the rational design of the heterointerface remains challen...Dispersing precious metal oxide nanoparticles on a support is a promising catalyst modification strategy for the oxygen evolution reaction in acidic media,but the rational design of the heterointerface remains challenging.Herein,electron-rich ruthenium dioxide dispersed on the metal-deficient TiO_(2) is constructed as an efficient electrocatalyst for oxygen evolution.The combination with defective support triggers the charge transfer from the support to RuO_(2),which optimizes the adsorption/desorption of oxo-intermediates and thus improves the kinetics of the OER reaction.Moreover,the large electron filling in the support,as an auxiliary,accelerates the deprotonation of oxo-intermediates during the acidic OER.As a result,the improved d-TiO_(2)/RuO_(2) showed excellent OER activity,with an overpotential of 226 mV@10 mA cm^(−2) in 0.5 M H_(2)SO_(4),which was superior to that of commercial RuO_(2).This study provides an ideal defective support for unique heterojunction catalysts and highlights the development of noble metal catalysts with low cost.展开更多
基金supported by the National Natural Science Foundation of China(52371226,22075141,and 22101132)Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province(BK20220039)+4 种基金Natural Science Foundation of Jiangsu Province(BK20221482 and BK20210311)the Fundamental Research Funds for the Central Universities(NS2023032)the Science and Technology Projects of Suzhou City(SYC2022043 and SYG202025)the Qing Lan Project of Jiangsu Province(2022)State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University(KF2312).
文摘Dispersing precious metal oxide nanoparticles on a support is a promising catalyst modification strategy for the oxygen evolution reaction in acidic media,but the rational design of the heterointerface remains challenging.Herein,electron-rich ruthenium dioxide dispersed on the metal-deficient TiO_(2) is constructed as an efficient electrocatalyst for oxygen evolution.The combination with defective support triggers the charge transfer from the support to RuO_(2),which optimizes the adsorption/desorption of oxo-intermediates and thus improves the kinetics of the OER reaction.Moreover,the large electron filling in the support,as an auxiliary,accelerates the deprotonation of oxo-intermediates during the acidic OER.As a result,the improved d-TiO_(2)/RuO_(2) showed excellent OER activity,with an overpotential of 226 mV@10 mA cm^(−2) in 0.5 M H_(2)SO_(4),which was superior to that of commercial RuO_(2).This study provides an ideal defective support for unique heterojunction catalysts and highlights the development of noble metal catalysts with low cost.
