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The Effect of PtRuIr Nanoparticle Crystallinity in Electrocatalytic Methanol Oxidation
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
Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangdong, Guangzhou 510640, China
South African Institute for Advanced Materials Chemistry, University of the Western Cape, Cape Town 7535, South Africa
* Authors to whom correspondence should be addressed.
Received: 18 February 2013; in revised form: 23 April 2013 / Accepted: 24 April 2013 / Published: 29 April 2013
Abstract: 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.
Keywords: electrocatalysts; fuel cells; methanol oxidation; structure; crystallinity
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MDPI and ACS Style
Ma, Y.; Wang, R.; Wang, H.; Liao, S.; Key, J.; Linkov, V.; Ji, S. The Effect of PtRuIr Nanoparticle Crystallinity in Electrocatalytic Methanol Oxidation. Materials 2013, 6, 1621-1631.
Ma Y, Wang R, Wang H, Liao S, Key J, Linkov V, Ji S. The Effect of PtRuIr Nanoparticle Crystallinity in Electrocatalytic Methanol Oxidation. Materials. 2013; 6(5):1621-1631.
Ma, Yanjiao; Wang, Rongfang; Wang, Hui; Liao, Shijun; Key, Julian; Linkov, Vladimir; Ji, Shan. 2013. "The Effect of PtRuIr Nanoparticle Crystallinity in Electrocatalytic Methanol Oxidation." Materials 6, no. 5: 1621-1631.