The Effect of PtRuIr Nanoparticle Crystallinity in Electrocatalytic Methanol Oxidation

Materials

Yanjiao Ma²  Rongfang Wang²  Hui Wang²  Shijun Liao¹  Julian Key³  Vladimir Linkov³ 

[1] Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangdong, Guangzhou 510640, China; E-Mail:;Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China; E-Mails:;South African Institute for Advanced Materials Chemistry, University of the Western Cape, Cape Town 7535, South Africa; E-Mails:

关键词: electrocatalysts;    fuel cells;    methanol oxidation;    structure;    crystallinity;   

DOI  :  10.3390/ma6051621

来源: mdpi

【 摘 要 】

Two structural forms of a ternary alloy PtRuIr/C catalyst, one amorphous and one highly crystalline, were synthesized and compared to determine the effect of their respective structures on their activity and stability as anodic catalysts in methanol oxidation. Characterization techniques included TEM, XRD, and EDX. Electrochemical analysis using a glassy carbon disk electrode for cyclic voltammogram and chronoamperometry were tested in a solution of 0.5 mol L⁻¹ CH₃OH and 0.5 mol L⁻¹ H₂SO₄. Amorphous PtRuIr/C catalyst was found to have a larger electrochemical surface area, while the crystalline PtRuIr/C catalyst had both a higher activity in methanol oxidation and increased CO poisoning rate. Crystallinity of the active alloy nanoparticles has a big impact on both methanol oxidation activity and in the CO poisoning rate.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.