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Construction of N, P Co-Doped Carbon Frames Anchored with Fe Single Atoms and Fe2 P Nanoparticles as a Robust Coupling Catalyst for Electrocatalytic Oxygen Reduction.
Pan, Yuan; Ma, Xuelu; Wang, Minmin; Yang, Xuan; Liu, Shoujie; Chen, Hsiao-Chien; Zhuang, Zeweng; Zhang, Yanhui; Cheong, Weng-Chon; Zhang, Chao; Cao, Xing; Shen, Rongan; Xu, Qian; Zhu, Wei; Liu, Yunqi; Wang, Xingdong; Zhang, Xuejiang; Yan, Wensheng; Li, Jun; Chen, Hao Ming; Chen, Chen; Li, Yadong.
Afiliação
  • Pan Y; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China.
  • Ma X; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Wang M; School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China.
  • Yang X; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China.
  • Liu S; School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
  • Chen HC; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Zhuang Z; Center for Reliability Science and Technologies, Chang Gung University, Taoyuan, 33302, Taiwan.
  • Zhang Y; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Cheong WC; School of Materials Science and Engineering, Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang, 110819, China.
  • Zhang C; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Cao X; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Shen R; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Xu Q; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Zhu W; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China.
  • Liu Y; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
  • Wang X; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China.
  • Zhang X; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
  • Yan W; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
  • Li J; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China.
  • Chen HM; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
  • Chen C; Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan.
  • Li Y; Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Adv Mater ; 34(29): e2203621, 2022 Jul.
Article em En | MEDLINE | ID: mdl-35606157
ABSTRACT
A coupling catalyst of highly dispersed N, P co-doped carbon frames (NPCFs) anchored with Fe single atoms (SAs) and Fe2 P nanoparticles (NPs) is synthesized by a novel in situ doping-adsorption-phosphatization strategy for the electrocatalytic oxygen reduction reaction (ORR). The optimized Fe SAs-Fe2 P NPs/NPCFs-2.5 catalyst shows a superior ORR activity and stability in 0.5 m H2 SO4 and 0.1 m KOH, respectively. Theoretical calculations reveal a synergistic effect, in that the existence of Fe2 P weakens the adsorption of ORR intermediates on active sites and lowers the reaction free energy. The doped P atoms with a strong electron-donating ability elevate the energy level of Fe-3d orbitals and facilitate the adsorption of O2 . The active Fe atoms exist in a low oxidation state and are less positively charged, and they serve as an electron reservoir capable of donating and releasing electrons, thus improving the ORR activity. Operando and in situ characterization results indicate that the atomically dispersed FeN4 /FeP coupled active centers in the Fe SAs-Fe2 P NPs/NPCFs-2.5 catalyst are characteristic of the different catalytic mechanisms in acidic and alkaline media. This work proposes a novel idea for constructing coupling catalysts with atomic-level precision and provides a strong reference for the development of high-efficiency ORR electrocatalysts for practical application.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China