Accelerated oxygen evolution kinetics on Ir-doped SrTiO_(3) perovskite by NH_(3) plasma treatment  

作　　者：Li-Li Deng Xiao-Ping Ma Man-Ting Lu Yi He Rong-Lei Fan Yu Xin 邓丽丽;马晓萍;卢曼婷;何弈;范荣磊;辛煜(School of Physical Science and Technology,Jiangsu Key Laboratory of Thin Films,Soochow University,Suzhou 215006,China)

机构地区：[1]School of Physical Science and Technology,Jiangsu Key Laboratory of Thin Films,Soochow University,Suzhou 215006,China

出　　处：《Chinese Physics B》2022年第11期611-618,共8页中国物理B（英文版）

基　　金：Project supported by the Priority Academic Program Development(PAPD)Program of Jiangsu Higher Education Institutions,Jiangsu Province,China;the National Natural Science Foundation of China(Grant No.11675117)。

摘　　要：Exploring low-cost and high-performance catalysts for oxygen evolution reaction(OER)remains to be a great challenge.Iridium-based perovskite oxide has large potential in OER because of its intrinsic activity and outstanding physicochemical properties.In this study,iridium-doped strontium titanate(Ir-STO)solution is brushed on a Ti sheet by the traditional method to obtain the Ir-STO/Ti electrodes after being calcined at a high temperature.The microstructure and electrocatalysis properties of the Ir-STO are further modified by a facile and scalable NH_(3)-plasma strategy.In addition to the doping of Ir,the NH_(3) plasma treatment further results in N-doping into Ir-STO,which enriches active species and causes oxygen vacancies near doped sites.The resulting N,Ir-STO/Ti electrode reveals excellent acidic OER activity with the lowest overpotential of 390 m V at 10 m A/cm^(2) and the smallest Tafel slope of 140 mV/dec after 10-min plasma treatment.Therefore,the great potential of activated N,Ir-STO/Ti is regarded as a catalyst for the OER,and thus making a new opportunity for developing other perovskite catalysts via NH_(3) plasma treatment.

关 键 词：ELECTROCATALYSTS NH_(3)plasma oxygen vacancies N doping 

分 类 号：O53[理学—等离子体物理]