Preparation and Methanol Electrooxidation of Pt/PMo₁₂/PEDOT/GC Electrodes

Authors

Jing-hua MA, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi, China;
Rui-xiang WANG, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi, China;
Yi-liang TAN, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi, China;
Shan-shan WANG, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi, China;
Yan-qin ZHANG, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi, China;
You-jun FAN, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi, China;Follow

Corresponding Author

You-jun FAN(youjunfan@mailbox.gxnu.edu.cn)

Abstract

Modification of phosphomolybdic acid (PMo₁₂) on poly(3,4-ethylenedioxythiophene) (PEDOT) film (PEDOT/GC) obtained through the electrochemical polymerization was performed using adsorption method (PMo₁₂/PEDOT/GC), followed by electrodepositing Pt on PMo₁₂/PEDOT/GC to prepare Pt/PMo₁₂/PEDOT/GC electrode. Effects of PMo₁₂ and PEDOT on the methanol oxidation performance of electrode were investigated. Results showed that PMo₁₂ obviously changed the morphology and structure of Pt loaded on the electrode, leading to the formation of sharp thorns at the edge of Pt nanostructures. Cyclic voltammetry and chronoamperometry data demonstrated that the catalytic activities of methanol electrooxidation on the Pt/PMo₁₂/PEDOT/GC and Pt/PEDOT/GC electrodes were higher than that on Pt/C, and the former exhibited the best performance. It was found that the presence of PEDOT not only increased the current, but also lowered the onset potential towards methanol oxidation. After further modification of PMo₁₂, the current of methanol oxidation was significantly increased, while the onset potential of methanol oxidation remained unaffected.

Graphical Abstract

Keywords

poly(3, 4-ethylenedioxythiophene), phosphomolybdic acid, fuel cells, anode catalysts, methanol electrooxidation

DOI Link

https://doi.org/10.61558/2993-074X.2109

Publication Date

2013-04-28

Online Available Date

2012-05-20

Revised Date

2012-05-10

Received Date

2012-03-28

Recommended Citation

Jing-hua MA, Rui-xiang WANG, Yi-liang TAN, Shan-shan WANG, Yan-qin ZHANG, You-jun FAN. Preparation and Methanol Electrooxidation of Pt/PMo₁₂/PEDOT/GC Electrodes[J]. Journal of Electrochemistry, 2013 , 19(2): 164-168.
DOI: 10.61558/2993-074X.2109
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss2/7

References

[1] Antolini E, Gonzalez E R. Polymer supports for low-temperature fuel cell catalysts[J]. Applied Catalyst A: General, 2009, 365(1): 1-19.

[2] Kuo C W, Sivakumar C, Wen T C. Nanoparticles of Pt/HxMoO3 electrodeposited in poly (3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) as the electrocatalyst for methanol oxidation[J]. Journal of Power Sources, 2008, 185(2): 807-814.

[3] Patra S, Munichandraiah N. Electrooxidation of methanol on Pt-modified conductive polymer PEDOT[J]. Langmuir, 2009, 25(3), 1732-1738.

[4] Maiyalagan T, Viswanathan B. Synthesis, characterization and electrocatalytic activity of Pt supported on poly(3,4-ethylenedioxythiophene)-V2O5 nanocomposites electrodes for methanol oxidation[J]. Materials Chemistry and Physics, 2010, 121(1/2): 165-171.

[5] Tintula K K, Sahu A K, et al. Directed synthesis of MC-PEDOT composite catalyst-supports for durable PEFCs[J]. Journal of Electrochemical Society, 2011, 158(6): B622-B631.

[6] Barczuk P J, Lewera A, Miecznikowski K, et al. Enhancement of catalytic activity of platinum-based nanoparticles towards electrooxidation of ethanol through interfacial modification with heteropolymolybdates[J]. Journal of Power Sources, 2010, 195(9): 2507-2513.

[7] Guo Z P, Han D M, Wexler D, et al. Polyoxometallate-stabilized platinum catalysts on multi-walled carbon nanotubes for fuel cell applications[J]. Electrochimica Acta, 2008, 53(22): 6410-6416.

[8] Wlodarczyk R, Chojak M, Miecznikowski K, et al. Electroreduction of oxygen at polyoxometallate- modified glassy carbon-supported Pt nanoparticles[J]. Journal of Power Sources, 2006, 159(2): 802-809.

[9] Han D M, Guo Z P, Zhao Z W, et al. Polyoxometallate-stabilized Pt-Ru catalysts on multiwalled carbon nanotubes: Influence of preparation conditions on the performance of direct methanol fuel cells[J]. Journal of Power Sources, 2008, 184(2): 361-369.

[10] Chojak M, Kolary-Zurowska A, Wlodarczyk R, et al. Modification of Pt nanoparticles with polyoxometallate monolayers: Competition between activation and blocking of reactive sites for the electrocatalytic oxygen reduction[J]. Electrochimica Acta, 2007, 52(18): 5574-5581.

[11] Zhou W Q, Du Y K, Ren F F, et al. High efficient electrocatalytic oxidation of methanol on Pt/polyindoles composite catalysts[J]. International Journal of Hydrogen Energy, 2010, 35(8): 3270-3279.

[12] Cheng Q, Jiang Y X, Tian N, et al. Electrocatalytic reduction of nitric oxide on Pt nanocrystals of different shape in sulfuric acid solutions[J]. Electrochimica Acta, 2010, 55(24): 8273-8279.

[13] Xu J X(许加欣), Jiang Y X(姜艳霞), Liao H G(廖洪钢), et al. Room temperature synthesis of thorn-like Pd nanoparticles and their enhanced electrocatalytic property for ethanol oxidation[J]. Acta Physico-Chimica Sinica(物理化学学报), 2010, 26(8): 2139-2143

[14] Li L(李莉), Wu G(武刚), Ye Q(叶青), et al. Electrochemical modification of Pt/C catalyst by silicomolybdic acid [J]. Acta Physico-Chimica Sinica (物理化学学报), 2006, 22(4): 419-423.