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Mesoporous Metal–Nitrogen-Doped Carbon Electrocatalysts for Highly Efficient Oxygen Reduction Reaction

Open access
Liang, Hai-Wei, Wei, Wei, Wu, Zhong-Shuai, Feng, Xinliang, Müllen, Klaus·2013·Journal of the American Chemical Society

Abstract

A family of mesoporous nonprecious metal (NPM) catalysts for oxygen reduction reaction (ORR) in acidic media, including cobalt-nitrogen-doped carbon (C-N-Co) and iron-nitrogen-doped carbon (C-N-Fe), was prepared from vitamin B12 (VB12) and the polyaniline-Fe (PANI-Fe) complex, respectively. Silica nanoparticles, ordered mesoporous silica SBA-15, and montmorillonite were used as templates for achieving mesoporous structures. The most active mesoporous catalyst was fabricated from VB12 and silica nanoparticles and exhibited a remarkable ORR activity in acidic medium (half-wave potential of 0.79 V, only ∼58 mV deviation from Pt/C), high selectivity (electron-transfer number >3.95), and excellent electrochemical stability (only 9 mV negative shift of half-wave potential after 10,000 potential cycles). The unprecedented performance of these NPM catalysts in ORR was attributed to their well-defined porous structures with a narrow mesopore size distribution, high Brunauer-Emmett-Teller surface area (up to 572 m(2)/g), and homogeneous distribution of abundant metal-Nx active sites.

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Metadata

Authors
Liang, H.-W., Wei, W., Wu, Z.-S., Feng, X., & Müllen, K.
Venue
Journal of the American Chemical Society
Published
2013-10-17
Volume
135
Issue
43
Pages
16002-16005
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1964442294
Cited by
1,205
References
1
FWCI
35.11
Type
journal article
Language
en
Open access
green

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