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Efficient Pt-free electrocatalyst for oxygen reduction reaction: Highly ordered mesoporous N and S co-doped carbon with saccharin as single-source molecular precursor

Paper ID Volume ID Publish Year Pages File Format Full-Text
44799 46353 2016 7 PDF Available
Title
Efficient Pt-free electrocatalyst for oxygen reduction reaction: Highly ordered mesoporous N and S co-doped carbon with saccharin as single-source molecular precursor
Abstract

•Saccharin as N, S, and C precursor was used to develop ordered mesoporous S- and N-co-doped carbon (SN-OMC).•A highly ordered mesoporous N- and S-co-doped carbon was successfully synthesized and used for ORR.•SN-OMC exhibits comparable electrocatalytic activity, stability to commercial Pt/C and inertness to CH3OH.

Despite that nitrogen (N) and sulfur (S) co-doped ordered mesoporous carbon (OMC) as Pt-free catalyst for oxygen reduction reaction (ORR) shows a desirable performance, the synthesis method is always complicated and expensive, which greatly hinders its development and application. In the present work, a highly ordered mesoporous N and S co-doped carbon material is developed. The material is obtained by combining hard template and high-temperature pyrolysis method using cheap saccharin as a single-source molecular precursor, SBA-15 as the hard template and FeCl3 as the catalyst to promote the carbonization process. It is found that the as-prepared SN-OMC catalyst, compared with the commonly used commercial Pt/C (20 wt.%), exhibits comparable ORR electrocatalytic activity with mainly four-electron (4e−) process, superior stability and inertness to methanol in alkaline media, which could mainly benefit from the highly ordered mesoporous structure and the synergistic effect caused by the dual N and S doping. These advantages render SN-OMC a promising ORR electrocatalyst and a cheap alternative to Pt/C for practical fuel cell applications.

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Keywords
Ordered mesoporous N and S co-doped carbon; Oxygen reduction reaction; Electrocatalytic activity; Methanol tolerance; Stability
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Efficient Pt-free electrocatalyst for oxygen reduction reaction: Highly ordered mesoporous N and S co-doped carbon with saccharin as single-source molecular precursor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 194, 5 October 2016, Pages 202–208
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us