Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6605656 | Electrochimica Acta | 2016 | 9 Pages |
Abstract
Platinum-based catalysts are a key to develop direct methanol fuel cells, which are usually dispersed on carbon supports to enhance catalytic activity, stability and utilization. Here, platinum/nitrogen-doped carbon (Pt/N-C) nanoparticles are synthesized in nitrogen-doped carbon quantum dots (N-CQDs) aqueous solution, and catalytic performance of Pt/N-C catalysts is researched for methanol electro-oxidation. Compared with Pt catalysts supported on commercial carbon black Vulcan XC-72 (Pt/XC-72), the peak current densities of Pt/N-C catalysts are 0.59Â mAÂ cmâ2 Pt and 385.2Â AÂ gâ1 Pt in 0.5Â M CH3OH and 0.5Â M H2SO4, while those of Pt/XC-72 catalysts are 0.39Â mAÂ cmâ2 Pt and 64.8Â AÂ gâ1 Pt. After polarizing 7200Â s at a fixed potential of 0.15Â V (vs. Hg/Hg2SO4), the catalytic activities of Pt/N-C are 0.14Â mAÂ cmâ2 Pt and 86.5Â AÂ gâ1 Pt, and those of Pt/XC-72 are 0.02Â mAÂ cmâ2 Pt and 2.6Â AÂ gâ1 Pt.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Aofeng Zhang, Xingwei Li, Ying He,