Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Regulation of oxygen vacancy within oxide pyrochlores by F-doping to boost oxygen-evolution activity | |
Wang, Pengfei1,2; Cheng, Qingqing1,4; Mao, Chenghui3; Su, Wanyu1,2,4; Yang, Lijun3; Wang, Guoliang1; Zou, Liangliang1; Shi, Yan5; Yan, Changfeng5 ; Zou, Zhiqing1; Yang, Hui1
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| 2021-08-01 | |
| Source Publication | JOURNAL OF POWER SOURCES
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| ISSN | 0378-7753 |
| Volume | 502Pages:8 |
| Corresponding Author | Zou, Zhiqing(zouzq@sari.ac.cn) ; Yang, Hui(yangh@sari.ac.cn) |
| Abstract | The development of cost-effective and durable oxygen evolution reaction (OER) catalysts is an essential prerequisite for hydrogen production through proton exchange membrane water electrolysis. Herein, a series of Fdoped pyrochlore yttrium ruthenate Y2Ru2O7-delta-xFx (YRuOF) are designed via low-temperature fluorination of precursor oxides with polyvinylidene fluoride. Both X-ray photoelectron spectroscopy and transmission electron microscopy results confirm that F is doped into the pyrochlore crystal lattice, inducing the oxygen vacancies (VO). Importantly, the OER catalytic activity is positively correlated with VO concentration. The density functional calculation (DFT) reveals that the existence of VO enhances the metal-oxygen covalency of pyrochlore, which is conducive to the lattice oxygen evolution mechanism, hence greatly accelerating the OER kinetic. Consequently, the optimized YRuOF catalyst exhibits a greatly enhanced OER activity with an overpotential of -235 mV at 10 mA cm-2 in comparison with that on undoped pyrochlore (-296 mV). Furthermore, such a Fdoped YRuOF catalyst has a very good OER stability. This study provides an ideal perspective to develop highly efficient and durable YRuOF for the oxygen evolution reaction. |
| Keyword | Pyrochlore oxide Oxygen evolution reaction Oxygen vacancy Fluorine doping Lattice oxygen evolution mechanism |
| DOI | 10.1016/j.jpowsour.2021.229903 |
| WOS Keyword | HIGHLY EFFICIENT ; METAL-OXIDES ; ELECTROCATALYSTS ; PEROVSKITE ; PERFORMANCE ; RUTHENATE ; FLUORINATION ; CATALYST ; IROX |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2018YFB1502400] ; National Natural Science Foundation of China[21673275] ; National Natural Science Foundation of China[21902177] ; Dalian National Laboratory for Clean Energy, CAS[XDA21090400] ; Dalian National Laboratory for Clean Energy, CAS[DNL180405] |
| WOS Research Area | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Dalian National Laboratory for Clean Energy, CAS |
| WOS Subject | Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000659445900007 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/33377 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Zou, Zhiqing; Yang, Hui |
| Affiliation | 1.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem MOE, Nanjing 210023, Peoples R China 4.Nanjing Univ, Sch Chem & Chem Engn, Jiangsu Prov Lab Nanotechnol, Nanjing 210023, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Pengfei,Cheng, Qingqing,Mao, Chenghui,et al. Regulation of oxygen vacancy within oxide pyrochlores by F-doping to boost oxygen-evolution activity[J]. JOURNAL OF POWER SOURCES,2021,502:8. |
| APA | Wang, Pengfei.,Cheng, Qingqing.,Mao, Chenghui.,Su, Wanyu.,Yang, Lijun.,...&Yang, Hui.(2021).Regulation of oxygen vacancy within oxide pyrochlores by F-doping to boost oxygen-evolution activity.JOURNAL OF POWER SOURCES,502,8. |
| MLA | Wang, Pengfei,et al."Regulation of oxygen vacancy within oxide pyrochlores by F-doping to boost oxygen-evolution activity".JOURNAL OF POWER SOURCES 502(2021):8. |
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