Novel VN/C nanocomposites as methanol-tolerant oxygen reduction electrocatalyst in alkaline electrolyte

被引：58
|
作者：
Huang, K. [1 ,2 ]
Bi, K. [1 ,2 ]
Liang, C. [1 ,2 ]
Lin, S. [1 ,2 ]
Zhang, R. [1 ,2 ]
Wang, W. J. [3 ]
Tang, H. L. [4 ]
Lei, M. [1 ,2 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
[3] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源：
SCIENTIFIC REPORTS | 2015年 / 5卷
基金：
中国国家自然科学基金;
关键词：
METAL-FREE ELECTROCATALYSTS; VANADIUM NITRIDE; FUEL-CELLS; NONNOBLE ELECTROCATALYST; NANOCRYSTALLINE VN; FACILE ROUTE; GRAPHENE; CATHODE; PERFORMANCE; PRECURSOR;
D O I：
10.1038/srep11351
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A novel VN/C nanostructure consisting of VN nanoparticles and graphite-dominant carbon layers is synthesized by nitridation of V2O5 using melamine as reductant under inert atmosphere. High crystalline VN nanoparticles are observed to be uniformly distributed in carbon layers with an average size of ca.13.45 nm. Moreover, the electrocatalytic performance of VN/C towards oxygen reduction reaction (ORR) in alkaline electrolyte is fascinating. The results show that VN/C has a considerable ORR activity, including a 75 percent value of the diffusion-limited current density and a 0.11 V smaller value about the onset potential with respect to Pt/C catalyst. Moreover, the excellent methanol-tolerance performance of VN/C has also been verified with 3 M methanol. Combined with the competitive prices, this VN/C nanocomposite can serve as an appropriate non-precious methanol-tolerant ORR catalyst for alkaline fuel cells.
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页数：9
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