Abstract
Instability of the carbon-supported Pt(Pt/C) catalyst at the cathode is one of the key technical challenges for the development of Direct Methanol Fuel Cells(DMFCs).In this paper,an efficient approach to enhancing the stability of the cathode catalyst was explored by designing and synthesizing a novel nanocomposite support,RuO2 coated carbon black(RuO2/C).Firstly,a wet chemical method was employed to synthesize the RuO2/C nanocomposite,from which Pt/RuO2/C catalyst was further prepared by a microwave method.The morphology and crystalline structure of the RuO2/C support and Pt/RuO2/C catalyst were then characterized by TEM and XRD.Finally,the electrochemical performance of the RuO2/C support and Pt/RuO2/C catalyst was analyzed by cyclic voltammetry,steady-state anodic corrosion,and rotating disk electrode techniques.The results showed that the Pt/RuO2/C catalyst had significantly improved methanol permeability and stability compared to the Pt/C one,which would extend the service life of DMFC cathode.This Pt/RuO2/C catalyst opens up a preferable method of preparing high performance Pt catalysts for the DMFC cathode.
Keywords
direct methanol fuel cell, cathode catalyst, RuO2/C support, Pt/RuO2/C catalyst, microwave method
Publication Date
2009-11-28
Online Available Date
2009-11-28
Revised Date
2009-11-28
Received Date
2009-11-28
Recommended Citation
Chun-yu DU, Tao DONG, Ge-ping YIN, Peng-fei SHI.
Highly Durable Pt/RuO_2/C Catalyst for the Cathode of Direct Methanol Fuel Cells[J]. Journal of Electrochemistry,
2009
,
15(4): 412-417.
DOI: 10.61558/2993-074X.2017
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol15/iss4/9
References
[1]Ren X M,Zelenay P,Thomas S,et al.Recent ad-vances in direct methanol fuel cells at Los Alamos Na-tional Laboratory[J].Journal of Power Sources,2000,86(1/2):111-116.
[2]Cremers C,Scholz M,Seliger W,et al.Developmentsfor improved direct methanol fuel cell stacks for portablepower[J].Fuel Cells,2007,7(1):21-31.
[3]Dillon R,Srinivasan S,AricA S,et al.Internationalactivities in DMFC R&D:Status of technologies and po-tential applications[J].Journal of Power Sources,2004,127:112-126.
[4]Li Xu-guang,Xing Wei,Lu Tian-hong,et al.Studieson methanol-tolerant cathode electrocatalysts cobalt tet-racarboxylic phthalocyanine supported on carbon black(CoPcTc/C)in direct methanol fuel cell[J].ChemicalJournal of Chinese Universities,2003,24(7):1246-1250.
[5]Baranton S,Coutanceau C,Roux C,et al.Oxygen re-duction reaction in acid medium at iron phthalocyaninedispersed on high surface area carbon substrate:toler-ance to methanol,stability and kinetics[J].Journal ofElectroanalytical Chemistry,2005,577:223-234.
[6]Chen Wei-min,Sun Gong-quan,Zhao Xin-sheng,etal.Degradation of electrocatalysts performance in directmethanol fuel cells[J].Chemical Journal of Chinese U-niversities,2007,28(5):142-145.
[7]Sarma L,Chen C,Wang G,et al.Investigations of di-rect methanol fuel cell(DMFC)fading mechanisms[J].Journal of Power Sources,2007,167:358-365.
[8]Profeti L,Sim es F,Olivi P,et al.Application of Pt+RuO2catalysts prepared by thermal decomposition ofpolymeric precursors to DMFC[J].Journal of PowerSources,2006,158:1195-1201.
[9]Cao L,Scheiba F,Roth C,et al.Novel nanocompositePt/RuO2.xH2O/carbon nanotube catalysts for directmethanol fuel cells[J].Angewandte Chemie,2006,(45):5315-5319.
[10]Chhina H,Campbell S,Kesler O.An oxidation-resist-ant indium tin oxide catalyst support for proton ex-change membrane fuel cells[J].J Power Sources,2006,161:893-900.
[11]Rolison D,Hagans P,Swider K,et al.Role of hy-drous ruthenium oxide in Pt-Ru direct methanol fuelcell anode electrocatalysts:The importance of mixed e-lectron/proton conductivity[J].Langmuir,1999,15(3):774-779.
[12]Ksoylu A E,Freitas M M A,Figueiredo J L.Bime-tallic Pt-Sn catalysts supported on activated carbon:I.The effects of support modification and impregnationstrategy[J].Appl Catal A,2000,192(1):29-42.
[13]Scheiba F,Scholz M,Cao L,et al.On the suitabilityof hydrous ruthenium oxide supports to enhance intrin-sic proton conductivity in DMFC anodes[J].FuelCells,2006,6:439-446.
[14]Radmilovic V,Gasteiger H,Ross P.Structure andchemical composition of a supported Pt-Ru electrocata-lyst for methanol oxidation[J].J Catal,1995,154(1):98-106.
[15]Lou HX,Shi Z J,Li N Q,et al.Investigation of theelectrochemical and electrocatalytic behavior of single-wall carbon nanotube film on a glassy carbon electrode[J].Anal Chem,2001,73:915-920.
[16]Kotz R,Carlen M.Principles and applications of elec-trochemical capacitors[J].Electrochim Acta,2000,45:2483-2498.
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