Boosting acidic water oxidation performance by constructing arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) with abundant atomic steps
作者机构：CAS Key Laboratory of Functional Materials and Devices for Special EnvironmentsXinjiang Technical Institute of Physics&ChemistryChinese Academy of SciencesUrumqi 830011China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China International Iberian Nanotechnology Laboratory(INL)Braga 4715-330Portugal Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Mechanical EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China School of Physics and ElectronicsHunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha 410083China Laboratory of Advanced Spectro-electrochemistry and Li-ion BatteriesDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of SemiconductorsSouth China Normal UniversityGuangzhou 510631China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第7期
页 面：5933-5939页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the S&T Partnership and International S&T Cooperation Program of Shanghai Cooperation Organization(No.2020E01040) the High-level Talent Project of Xinjiang Uygur Autonomous Region(No.2020000039) the National Key R&D Program of China(Nos.2018YFB0104400 and 2016YFB0100100) the National Natural Science Foundation of China(Nos.62104073,21825202,92045302,21972055,and 21733012) Newton Advanced Fellowships(No.NAF/R2/180603) B.L.acknowledges the support by the National Natural Science Foundation of China(No.21573255)
主 题：oxygen evolution reaction(OER)electrolysis nanoporous structure Ir_(x)Ru_(1−x)O_(2) defects atomic steps
摘 要：The fabrication of electrocatalysts with high activity and acid stability for acidic oxygen evolution reaction(OER)is an urgent need,yet extremely ***,we report the design and successful fabrication of a high performance self-supported cogwheel arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) catalyst with abundant atomic steps for acidic OER using a facile alloy-spinningelectrochemical activation method that allows large-scale *** obtained Ir_(x)Ru_(1−x)O_(2) catalysts merely need overpotentials of 211 and 295 mV to deliver catalytic current densities of 10 and 300 mA·cm^(−2) in 0.5 M H_(2)SO_(4),respectively,and can sustain constant OER electrolysis for at least 140 h at a high current density of 300 mA·cm^(−2).Further density functional theory(DFT)calculations uncover that such high intrinsic activities mainly originate from the largely exposed high-index atomic step planes,which markedly lower the limiting potential of the rate-determining step(RDS)of *** findings provide an insight into the exploration of high performance electrocatalysts,and open up an avenue for further developing the state-of-theart Ir and/or Ru-based catalysts for large-scale practical applications.
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