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Theory-Guided Regulation of FeN4 Spin State by Neighboring Cu Atoms for Enhanced Oxygen Reduction Electrocatalysis in Flexible Metal-Air Batteries.
He, Ting; Chen, Yang; Liu, Qiming; Lu, Bingzhang; Song, Xianwen; Liu, Hongtao; Liu, Min; Liu, You-Nian; Zhang, Yi; Ouyang, Xiaoping; Chen, Shaowei.
Afiliação
  • He T; Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.
  • Chen Y; School of Materials Science and Engineering, Xiangtan University Yuhu District, Xiangtan, Hunan, 411105, China.
  • Liu Q; Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.
  • Lu B; Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA.
  • Song X; Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA.
  • Liu H; Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.
  • Liu M; Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.
  • Liu YN; School of Physics and Electronics, Central South University, Changsha, Hunan, 410083, China.
  • Zhang Y; Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.
  • Ouyang X; Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.
  • Chen S; Key Laboratory of Materials Processing and Mold, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, 450002, China.
Angew Chem Int Ed Engl ; 61(27): e202201007, 2022 Jul 04.
Article em En | MEDLINE | ID: mdl-35468253
ABSTRACT
Iron, nitrogen-codoped carbon (Fe-N-C) nanocomposites have emerged as viable electrocatalysts for the oxygen reduction reaction (ORR) due to the formation of FeNx Cy coordination moieties. In this study, results from first-principles calculations show a nearly linear correlation of the energy barriers of key reaction steps with the Fe magnetic moment. Experimentally, when single Cu sites are incorporated into Fe-N-C aerogels (denoted as NCAG/Fe-Cu), the Fe centers exhibit a reduced magnetic moment and markedly enhanced ORR activity within a wide pH range of 0-14. With the NCAG/Fe-Cu nanocomposites used as the cathode catalyst in a neutral/quasi-solid aluminum-air and alkaline/quasi-solid zinc-air battery, both achieve a remarkable performance with an ultrahigh open-circuit voltage of 2.00 and 1.51 V, large power density of 130 and 186 mW cm-2 , and good mechanical flexibility, all markedly better than those with commercial Pt/C or Pt/C-RuO2 catalysts at the cathode.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article