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题名: Perovskites decorated with oxygen vacancies and Fe-Ni alloy nanoparticles as high-efficiency electrocatalysts for the oxygen evolution reaction
作者: Zhu, Kaiyue1, 2;  Wu, Tao3;  Li, Mingrun1;  Lu, Ruifeng3;  Zhu, Xuefeng1;  Yang, Weishen1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2017-10-07
DOI: 10.1039/c7ta05404a
卷: 5, 期:37, 页:19836-19845
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: Perovskite oxides have emerged as promising electrocatalysts for the sluggish oxygen evolution reaction (OER) which limits the efficiencies of rechargeable energy storage technologies and hydrogen production from water splitting. Understanding materials characteristics that affect OER activity is of paramount importance for the optimization of perovskite oxides for the OER. Herein, a series of Sr2Fe1.3Ni0.2Mo0.5O6-delta (SFNMs) decorated with oxygen vacancies and Fe-Ni alloy nanoparticles were designed to increase both the number and the reactivity of active sites in the perovskite catalysts. Theoretical calculations reveal that oxygen vacancies have a beneficial effect on the OER by increasing the adsorption energy of H2O, in line with the experimental results that the SFNM sample enriched with oxygen vacancies possesses a high intrinsic OER activity. SFNM decorated with metallic nanoparticles, which was prepared by reducing SFNM in 5% H-2/Ar, shows a Tafel slope of 59 mV dec(-1) and an OER overpotential of 0.36 V at a current density of 10 mA cm(-2). This performance is superior to that of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) and close to that of commercial IrO2. The outstanding performance is attributed to the fact that the oxygen vacancies together with the exsolved alloy nanoparticles on the perovskite backbone can increase both the number and the reactivity of active sites.
关键词[WOS]: OXIDE FUEL-CELLS ;  INITIO MOLECULAR-DYNAMICS ;  AUGMENTED-WAVE METHOD ;  DEFICIENT PEROVSKITE ;  WATER OXIDATION ;  AIR BATTERIES ;  SURFACE-AREA ;  PERFORMANCE ;  ELECTROLYSIS ;  CATALYSTS
语种: 英语
WOS记录号: WOS:000411739700033
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150151
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China

Recommended Citation:
Zhu, Kaiyue,Wu, Tao,Li, Mingrun,et al. Perovskites decorated with oxygen vacancies and Fe-Ni alloy nanoparticles as high-efficiency electrocatalysts for the oxygen evolution reaction[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(37):19836-19845.
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