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Transition Metal (Fe, Co, Ni) Nanoparticles on Selective Amino-N-Doped Carbon as High-Performance Oxygen Reduction Reaction Electrocatalyst

1
School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea
2
Department of Materials Science and Engineering, College of Engineering, Shibaura Institute of Technology, Tokyo 135-8548, Japan
3
Division of Marine Engineering, Korea Maritime and Ocean University, Busan 606-791, Korea
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(5), 742; https://doi.org/10.3390/nano9050742
Received: 27 March 2019 / Revised: 8 May 2019 / Accepted: 9 May 2019 / Published: 14 May 2019
(This article belongs to the Special Issue Materials and Components for Electrochemical Storage Devices)
PDF [1768 KB, uploaded 14 May 2019]

Abstract

Metal-air batteries are attracting increasing attention as a superior renewable energy conversion device due to their high performance and strong potential. However, the high cost and low stability of the current Pt catalyst is the main obstacle preventing wide industrial application. In this work, we applied a plasma process to fabricate aniline and a transition metals electrode (Fe, Co, Ni) as the carbon-nitrogen and the metal nanoparticle (NP) precursors, respectively, for selective metal/amino-N-doped carbon catalysts. All three as-synthesized catalysts exhibited dominant amino-N as the major C–N bonding state. In electrochemical testing, Co/amino-N-doped carbon showed positive E1/2 potential (0.83 V vs. Reversible Hydrogen Electrode (RHE)). In addition, the calculated electron transfer number (n) of Co/amino-N-doped carbon at 0.5 V vs. RHE was 3.81, which was only slightly less than that of commercial Pt/C (3.97). This superior performance of transition metal/amino-N-doped carbon promotes it as an economical oxygen reduction reaction (ORR) electrocatalyst to replace expensive Pt/C in metal-air batteries.
Keywords: nitrogen-doped carbon; transitional metal nanoparticles; oxygen reduction reaction; metal-nitrogen-hybrid catalyst; selective amino-N doping nitrogen-doped carbon; transitional metal nanoparticles; oxygen reduction reaction; metal-nitrogen-hybrid catalyst; selective amino-N doping
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kim, S.; Kato, S.; Ishizaki, T.; Li, O.L.; Kang, J. Transition Metal (Fe, Co, Ni) Nanoparticles on Selective Amino-N-Doped Carbon as High-Performance Oxygen Reduction Reaction Electrocatalyst. Nanomaterials 2019, 9, 742.

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