Design of N‑Coordinated Dual-Metal Sites: A Stable and Active Pt-Free Catalyst for Acidic Oxygen Reduction Reaction.
We develop a host-guest strategy to construct an electrocatalyst with Fe-Co dual sites embedded on N-doped porous carbon and demonstrate its activity for oxygen reduction reaction in acidic electrolyte. Our catalyst exhibits superior oxygen reduction reaction performance, with comparable onset poten...
| Publicado en: | Journal of the American Chemical Society Vol. 139; no. 48; pp. 17281 - 17285 |
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| Autores principales: | , , , , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
12/6/2017
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=126761833&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 126761833 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 12/6/2017 vid: 139 iid: 48 pid: 997 pub: American Chemical Society artinfo: ui: 126761833 10.1021/jacs.7b10385 ppf: 17281 ppct: 4 formats: tig: atl: Design of N‑Coordinated Dual-Metal Sites: A Stable and Active Pt-Free Catalyst for Acidic Oxygen Reduction Reaction. aug: au: Jing Wang Zhengqing Huang Wei Liu Chunran Chang Haolin Tang Zhijun Li Wenxing Chen Chunjiang Jia Tao Yao Shiqiang Wei Yuen Wu Yadong Li affil: Department of Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei 230026, China Institute of Industrial Catalysis, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada Department of Chemistry, Tsinghua University, Beijing 100084, China Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China su: Oxygen reduction Platinum catalysts Iron compounds Cobalt compounds Density functional theory sug: subj: Oxygen reduction Platinum catalysts Iron compounds Cobalt compounds Density functional theory ab: We develop a host-guest strategy to construct an electrocatalyst with Fe-Co dual sites embedded on N-doped porous carbon and demonstrate its activity for oxygen reduction reaction in acidic electrolyte. Our catalyst exhibits superior oxygen reduction reaction performance, with comparable onset potential (E, 1.06 vs 1.03 V) and half-wave potential (E, 0.863 vs 0.858 V) than commercial Pt/C. The fuel cell test reveals (Fe,Co)/N-C outperforms most reported Pt-free catalysts in H/O and H2/air. In addition, this cathode catalyst with dual metal sites is stable in a long-term operation with 50 000 cycles for electrode measurement and 100 h for H/air single cell operation. Density functional theory calculations reveal the dual sites is favored for activation of O-O, crucial for four-electron oxygen reduction. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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