Journal article
Interconnected Fe, S, N-Codoped Hollow and Porous Carbon Nanorods as Efficient Electrocatalysts for the Oxygen Reduction Reaction
ACS applied materials & interfaces, Vol.9(46), pp.40298-40306
11/22/2017
PMID: 29098848
Abstract
As promising precious metal-free oxygen reduction reaction (ORR) electrocatalysts, Fe-N-C catalysts still face a great challenge to meet the requirement of practical applications. In this study, Fe, S, N-codoped hollow and porous carbon nanorods (Fe-S-N HPCNRs) were designed with the aim of improving the performance of Fe-N-C catalysts from the perspective of composition and structure. They were successfully prepared using cysteine, Fe2+ salt, and polydopamine-encapsulated ZnO nanorods (ZnO NRs@PDA) as precursors by a pyrolysis-acid etching strategy. The hollow and porous structure and composition of Fe, S, N, and C were verified by transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller, and X-ray photoelectron spectroscopy tests. At the optimum ratio of ZnO NRs@PDA/cysteine and pyrolysis temperature, the Fe-S-N HPCNRs display higher ORR activities than the control samples which are lack of one of the precursors. Electrochemical tests show that the ORR. follows a 4e pathway with the Fe-S-N HPCNRs. In addition, the long-term stability and methanol tolerance of Fe-S-N HPCNRs are good and superior to those of 20 wt % Pt/C.
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Details
- Title
- Interconnected Fe, S, N-Codoped Hollow and Porous Carbon Nanorods as Efficient Electrocatalysts for the Oxygen Reduction Reaction
- Creators
- Yinling Wang - Anhui Normal UniversityChengzhou Zhu - Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USAShuo Feng - Washington State UniversityQiurong Shi - Washington State UniversityShaofang Fu - Washington State UniversityDan Du - Washington State UniversityQiang Zhang - Washington State Univ, Dept Chem, Pullman, WA 99164 USAYuehe Lin - Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA
- Publication Details
- ACS applied materials & interfaces, Vol.9(46), pp.40298-40306
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Amer Chemical Soc
- Number of pages
- 9
- Grant note
- Washington State University, USA
- Identifiers
- 99901227635701842
- Language
- English
- Resource Type
- Journal article