In:
ChemElectroChem, Wiley, Vol. 2, No. 11 ( 2015-11), p. 1813-1820
Abstract:
The oxygen reduction reaction (ORR) is a crucial process not only in fuel cells, but also in metal–air batteries, thus its electrocatalysts have attracted considerable attention. Here, we report the use of a vanadium nitride/porous graphitic nanocarbon (VN/PGNC) composite as an efficient support for a platinum electrocatalyst towards ORR. The VN/PGNC composite was synthesized through a gel‐coordination pyrolytic route. The gelatinous precursor formed by the coordination of VO 3 − , Ni 2+ , tetraethyl orthosilicate (TEOS), and glucose, followed by a carbonization–nitridation and a subsequent acid‐treatment process, led to the formation of the VN/PGNC composite with a large surface area of 879.0 m 2 g −1 . The synthetic 10 % Pt–VN/PGNC catalyst exhibited excellent ORR performance with more positive onset potential (1.02 V), 1.2 times higher mass activity (135.5 mA mg −1 ), 0.4 times higher specific activity (4.15 mA cm −2 ), and better cyclic stability compared with the commercial 20 % Pt/C catalyst. The 10 % Pt–VN/PGNC catalyst mainly exhibits a four‐electron pathway. The excellent performance of 10 % Pt–VN/PGNC catalyst is attributed to the porous structure of the support, which facilitates strong synergistic effects between the Pt and VN nanoparticles. The present work provides a cost‐effective route for the synthesis of the efficient ORR catalyst, which could promote the development of fuel cells.
Type of Medium:
Online Resource
ISSN:
2196-0216
,
2196-0216
DOI:
10.1002/celc.201500173
Language:
English
Publisher:
Wiley
Publication Date:
2015
detail.hit.zdb_id:
2724978-5
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