Using phosphomolybdic acid (H 3PMo 12O 40) to efficiently enhance the electrocatalytic activity and CO-tolerance of platinum nanoparticles supported on multi-walled carbon nanotubes catalyst in acidic medium

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 638; no. 1; pp. 167 - 172
• Main Authors: Guo, Xun, Guo, Dao-Jun, Wang, Jian-She, Qiu, Xin-Ping, Chen, Li-Quan, Zhu, Wen-Tao
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01.01.2010; Elsevier
• Subjects: Alcohol electro-oxidation; Applied sciences; Carbon monoxide tolerance; Direct alcohol fuel cells; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel cells; Heteropoly acids; Phosphomolybdic acid; Pt nanoparticles; Carbon monoxide tolerance; Pt nanoparticles; Heteropoly acids; Alcohol electro-oxidation; Phosphomolybdic acid; Direct alcohol fuel cells; Nanoparticle; Carbon nanotubes; Molybdophosphoric acid; Supported catalyst; Acidic solution; Surface structure; Electrocatalysis; Platinum; Oxidation; Carbon monoxide; Electrochemical reaction; Methanol; Alcohol fuel cells; Transition metal; X ray diffraction; Primary alcohol; Heteropolyacid; Transmission electron microscopy; Multiwalled nanotube; Morphology; Catalyst activity
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2009.09.001

A simple approach is reported for utilizing phosphomolybdic acid, H 3PMo 12O 40, (HPMo) to enhance the electrocatalytic activity and carbon monoxide (CO) tolerance of platinum electrocatalysts supported on multi-walled carbon nanotubes (MWCNTs) in acidic medium. Pt/MWCNTs catalyst is prepared by the ethylene glycol reduction method, and then physically mixed with HPMo for electrochemical characterizations in terms of alcohol and CO electro-oxidation using cyclic voltammetry (CV), chronoamperometry and electrochemical impendence spectra (EIS). The results show that HPMo can efficiently enhance the electrocatalytic activity and CO-tolerance of Pt/MWCNTs catalyst. The effect of HPMo wt.% on the electrocatalytic activity towards methanol electro-oxidation of Pt/MWCNTs is also investigated by CV. The best results appear at the HPMo wt.% = 30%. We further investigated the reason of Pt/MWCNTs + HPMo composite catalyst with good stability.