High Utilization AuPt Nanoparticles Supported on MWCNTS for Methanol Electro-oxidation in Alkaline Medium

Authors

Xun GUO, Key Laboratory of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China;
Dao-jun GUO, Key Laboratory of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China;School of Chemistry and Chemical Engineering,Qufu Normal University,Qufu 273165,Shandong,China;
Xin-ping QIU, Key Laboratory of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China;
Li-quan CHEN, Key Laboratory of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China;
Wen-tao ZHU, Key Laboratory of Organic Optoelectronics and Molecular Engineering,Department of Chemistry,Tsinghua University,Beijing 100084,China;

Abstract

We synthesized gold-platinum electrocatalysts supported on multi-walled carbon nanotubes(MWCNTs) with high utilization by a simple one-step method.A high Pt loading series of bimetallic AuPt/MWCNTs catalysts were prepared by the improved ethylene glycol reduction method,and then were compared in terms of the electrocatalytic activity for methanol electro-oxidation using cyclic voltammetry(CV) and chronoamperometry in alkaline solutions.The structure of AuPt/MWCNTs was characterized by the transmission electron microscopy(TEM),X-ray diffraction(XRD) and energy-dispersive X-ray spectroscopy(EDS).The results showed that the AuPt/MWCNTs catalysts had high Pt utilization,uniform AuPt nanoparticles size and good electrocatalytic activity for methanol electro-oxidation.The effect of Au/Pt mass ratio on electrocatalytic activity was also investigated.The highest peak current and lowest onset potential for methanol electro-oxidation appeared at the Au/Pt/MWCNTS mass ratio of 10∶8∶32.

Keywords

methanol electro-oxidation, ethylene glycol reduction, AuPt nanoparticles, multi-walled carbon nanotubes, direct methanol fuel cell

DOI Link

https://doi.org/10.61558/2993-074X.1951

Publication Date

2009-02-28

Online Available Date

2009-02-28

Revised Date

2009-02-28

Received Date

2009-02-28

Recommended Citation

Xun GUO, Dao-jun GUO, Xin-ping QIU, Li-quan CHEN, Wen-tao ZHU. High Utilization AuPt Nanoparticles Supported on MWCNTS for Methanol Electro-oxidation in Alkaline Medium[J]. Journal of Electrochemistry, 2009 , 15(1): 38-42.
DOI: 10.61558/2993-074X.1951
Available at: https://jelectrochem.xmu.edu.cn/journal/vol15/iss1/10

References

[1]Hamnett A.Mechanism and electrocatalysis in the di-rect methanol fuel cell[J].Catal Today,1997,38(4):445-457.
[2]McNicol B D,Rand D A J,Williams K R.Directmethanol-air fuel cells for road transportation[J].JPower Sources,1999,83(1~2):15-31.
[3]Arico A S,Srinivasan S,Antonucci V.DMFCs:fromfundamental aspects to technology development[J].Fuel Cells,2001,1(2):133-161.
[4]Jarvi T D,Sriramulu S,Stuve E M.Potential depend-ence of the yield of carbon dioxide from electrocatalyticoxidation of methanol on platinum(100)[J].J PhysChem,1997,101(19):3646-3652.
[5]Redding E,Sapienza A,Smotkin E S.Combinatorialelectrochemistry:A highly parallel,optical screeningmethod for discovery of better electrocatalysts[J].Sci-ence,1998,280(5370):1735-1737.
[6]Ren X,Zelenay S,Thomas S,et al.Recent advancesin direct methanol fuel cells at Los Alamos National La-boratory[J].J Power Sources,2000,86(1~2):111-116.
[7]Gurau B,Smotkin E S.Methanol crossover in directmethanol fuel cells:a link between power and energydensity[J].J Power Sources,2002,112(2):339-352.
[8]Beden B,Lamy C,Bewick A,et al.Electrosorption ofmethanol on a platinum electrode.IR spectroscopic evi-dence for adsorbed co species[J].J ElectroanalChem,1981,121:343-347.
[9]Seiler T,Savinova E R,Frtiedrich K A,et al.Poison-ing of PtRu/C catalysts in the anode of a direct metha-nol fuel cell:a DEMS study[J].Electrochim Acta,2004,49(22~23):3927-3936.
[10]Paulus U A,Endruschat U,Feldmeyer G J,et al.New PtRu alloy colloids as precursors for fuel cell cat-alysts[J].J Catal,2000,195(2):383-393.
[11]Lu G Q,Liu F Q,Wang C Y.Water transport throughNafion 112 membrane in DMFCs[J].ElectrochemSolid-State Lett,2005,8(1):A1-A4.
[12]Liu R X,Smotkin E S.Array membrane electrode as-semblies for high throughput screening of direct metha-nol fuel cell anode catalysts[J].J Electroanal Chem,2002,535(1~2):49-55.
[13]Niwa M,Igarashi J.Role of the solid acidity on theMoO3loaded on SnO2in the methanol oxidation intoformaldehyde[J].Catal Today,1999,52(1):71-81.
[14]Gasteiger H A,Markovic N,Ross P N,et al.Effectof the supporting electrolyte and beam diameter onprobe beam deflection experiments[J].J PhysChem,1993,97(1~2):55-69.
[15]Haruta M,Date M.Advances in the catalysis of Aunanoparticles[J].Appl Catal A,2001,222(1~2):427-437.
[16]Valden M,Lai X,Goodman D W.Onset of catalyticactivity of gold clusters on titania with the appearanceof nonmetallic properties[J].Science,1998,281(5383):1647-1650.
[17]Xu C X,Su J X,Xu X H,et al.Lowtemperature COoxidation over unsupported nanoporous gold[J].JAm Chem Soc,2007,129(1):42-43.
[18]Santhosh P,Gopalan A,Lee K P.Gold nanoparticlesdispersed polyaniline grafted multiwall carbon nano-tubes as newer electrocatalysts:Preparation and per-formances for methanol oxidation[J].J Catal,2006,238(1):177-185.
[19]Guo S J,Fang Y X,Dong S J,et al.High-efficiencyand low-cost hybrid nanomaterial as enhancing electro-catalyst:Spongelike AWN core/shell nanomaterialwith hollow cavity[J].J Phys Chem C,2007,111(45):17104-17109.
[20]Park I S,Lee K S,Cho Y H,et al.Methanol electro-oxidation on carbon-supported and Pt-modified Aunanoparticles[J].Catal Today,2008,132(1~4):127-131.
[21]Luo J,Njoki P N,Lin Y,et al.Characterization ofcarbon-supported AuPt nanoparticles for electrocatalyt-ic methanol oxidation reaction[J].Langmuir,2006,22(6):2892-2898.
[22]Zeng J H,Yang J,Lee J Y,et al.Preparation of car-bon-supported core-shell Au-Pt nanoparticles for meth-anol oxidation reaction:The promotional effect of theAu core[J].J Phys Chem B,2006,110(48):24606-24611.
[23]Kristian N,Wang X.Pt-shell-Au-core/C electrocata-lyst with a controlled shell thickness and improved Ptutilization for fuel cell reactions[J].ElectrochemCommun,2008,10(1):12-15.
[24]Cameron D,Holliday R,Thompson D.Gold's futurerole in fuel cell systems[J].J Power Sources,2003,118(1~2):298-303.
[25]Li W Z,Liang C H,Zhou W J,et al.Preparation andcharacterization of multiwalled carbon nanotube-sup-ported platinum for cathode catalysts of direct methanolfuel cells[J].J Phys Chem B,2003,107(26):6292-6299.
[26]Luo J,Maye M M,Petkov V,et al.Phase propertiesof carbon-supported gold-platinum nanoparticles withdifferent bimetallic compositions[J].Chem Mater,2005,17(12):3086-3091.
[27]Wu M L,Chen D H,Huang TC.Preparation of Au/Pt bimetallic nanoparticles in water-in-oil microemul-sions[J].Chem Mater,2001,13(2):599-606.
[28]Kabbabi A,Faure R,Durand R,et al.In situ FTIRSstudy of the electrocatalytic oxidation of carbon monox-ide and methanol at platinum-ruthenium bulk alloy e-lectrodes[J].J Electroanal Chem,1998,444(1):41-53.