Preparation of Pt-loaded nitrogen-doped activated carbons and their catalytic activities for the oxygen reduction reaction

LI Li-xiang; ZHANG Yan-qiu; SUN Pan-song; AN Bai-gang; XING Tian-yu; SONG Ren-feng

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Article Navigation > New Carbon Mater. > 2016 > 31(3): 287-292

LI Li-xiang, ZHANG Yan-qiu, SUN Pan-song, AN Bai-gang, XING Tian-yu, SONG Ren-feng. Preparation of Pt-loaded nitrogen-doped activated carbons and their catalytic activities for the oxygen reduction reaction. New Carbon Mater., 2016, 31(3): 287-292.

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Preparation of Pt-loaded nitrogen-doped activated carbons and their catalytic activities for the oxygen reduction reaction

1.
School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China;
2.
Ansteel Mining Engineering Corporation, Anshan 114004, China

Funds: National Natural Foundation of China (51102126);Innovative Research Team in Colleges and University of Liaoning Province, China (LT2014007);Natural Science Foundation of Liaoning Province, China (201502063).

Received Date: 2016-05-03
Accepted Date: 2016-06-28
Rev Recd Date: 2016-06-02
Publish Date: 2016-06-28

Abstract

Abstract

Two nitrogen-doped activated carbons (NACs) were prepared by the in-situ polymerization of pyrrole in activated carbon (AC), followed by carbonization at 700 or 900℃. Platinum was loaded onto the AC and NACs by impregnation with a H₂PtCl₆ solution followed by chemical reduction with excess NaBH₄. The oxygen reduction reaction (ORR) performance of the Pt-loaded AC and NACs were investigated. Results indicate that the nitrogen doping decreases the specific surface area, but improves water dispersibility and surface activity, which makes the platinum loading more uniform on the NACs than on the AC. Of the three sample the material with the highest density of platinum particles with sizes less than 5 nm uniformly distributed on the surface was NAC900, and the platinum loading was higher than that on AC and NAC700. The ORR catalytic performance of the Pt-loaded activated carbons was enhanced by the nitrogen doping. Pt-NAC900 exhibits the most positive ORR peak and the highest ORR peak current, and its ORR peak current decay is the slowest of the three samples.
- Nitrogen doping,
- Activated carbon,
- Platinum,
- Oxygen reduction reaction

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References(28)

References

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