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新型VN/C纳米复合材料作为碱性电解质中耐甲醇氧还原电催化剂

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

作者信息

Huang K, Bi K, Liang C, Lin S, Zhang R, Wang W J, Tang H L, Lei M

机构信息

State Key Laboratory of Information Photonics and Optical Communications &School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

出版信息

Sci Rep. 2015 Jun 23;5:11351. doi: 10.1038/srep11351.

DOI:10.1038/srep11351
PMID:26100367
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4477409/
Abstract

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 ca13.45 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.

摘要

在惰性气氛下，以三聚氰胺为还原剂对V2O5进行氮化，合成了一种由VN纳米颗粒和以石墨为主的碳层组成的新型VN/C纳米结构。观察到高结晶度的VN纳米颗粒均匀分布在碳层中，平均尺寸约为13.45nm。此外，VN/C在碱性电解质中对氧还原反应（ORR）的电催化性能令人着迷。结果表明，VN/C具有相当可观的ORR活性，包括扩散限制电流密度的75%的值，以及相对于Pt/C催化剂而言，起始电位小0.11V的值。此外，VN/C在3M甲醇存在下的优异耐甲醇性能也得到了验证。结合具有竞争力的价格，这种VN/C纳米复合材料可作为碱性燃料电池合适的非贵金属耐甲醇ORR催化剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/832bdfd863c4/srep11351-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/bd3533356bea/srep11351-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/241cbd5a9c22/srep11351-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/16d1cab02fde/srep11351-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/44d0d205c03d/srep11351-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/d4d1576fd62a/srep11351-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/7d26c179bddb/srep11351-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/832bdfd863c4/srep11351-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/bd3533356bea/srep11351-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/241cbd5a9c22/srep11351-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/16d1cab02fde/srep11351-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/44d0d205c03d/srep11351-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/d4d1576fd62a/srep11351-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/7d26c179bddb/srep11351-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5231/4477409/832bdfd863c4/srep11351-f7.jpg

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