Influence of Pt:Ru Ratio in Nanotubes Array Structures on the Electrocatalytic Activity of Methanol Oxidation

Authors

Jin-Hua YUAN, State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
Feng-Bin WANG, State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
Xing-Hua XIA, State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;Follow

Corresponding Author

Xing-Hua XIA(xhxia@nju.edu.cn)

Abstract

Bimetallic PtRu nanotubes array electrodes (NTAEs) with varied Pt to Ru atomic ratios have been prepared by electrochemical codeposition in 3-aminopropyltri-methoxysilane modified porous anodic alumina (PAA) membranes. The structure and morphology of the catalysts were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Electrochemical results showed that the NTAEs with varied atomic ratios could be achieved by controlling the precursor concentration for deposition. The prepared nanoarrays composed of Pt or PtRu alloy promoted the mass-normalized activity toward the sluggish electrooxidation reaction of methanol due to the increased catalytic activity and real surface area, as well as the improved mass transport through the catalysts. Correlations between the anode composition and the electrocatalytic activity of the catalysts toward the electrooxidations of CO and CH₃OH were systemically investigated. The PtRu NTAEs containing ca. 50% Ru showed the highest activity for CO electrooxidation, while the PtRu NATEs of 40% Ru for CH₃OH electrooxidation.

Graphical Abstract

Keywords

electrocatalysts, PtRu, Nanotubes, Methanol, CO

DOI Link

https://doi.org/10.13208/j.electrochem.131174

Publication Date

2014-10-28

Online Available Date

2014-05-19

Revised Date

2014-05-14

Received Date

2014-02-13

Recommended Citation

Jin-Hua YUAN, Feng-Bin WANG, Xing-Hua XIA. Influence of Pt:Ru Ratio in Nanotubes Array Structures on the Electrocatalytic Activity of Methanol Oxidation[J]. Journal of Electrochemistry, 2014 , 20(5): 416-425.
DOI: 10.13208/j.electrochem.131174
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss5/4