Hongyi Li1,2, Jinshu Wang1 (*), Man Liu1, Hong Wang1, Penglei Su1, Junshu Wu1, and Ju Li2 (*)
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1 Key Laboratory of Advanced Materials, College of Materials and Engineering, Beijing University of Technology, Beijing 100124, China 2 Department of Nuclear Science and Engineering and Department of Materials Science andEngineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
Keywords:electrocatalyst, titanium dioxide nanotube, platinum nanoflower, catalytic activity, cycle life
To improve the contact between platinum catalyst and titanium substrate, a layer of TiO2 nanotube arrays has been synthesized before depositing Pt nanoflowers by pulse electrodeposition. Dramatic improvements in electrocatalytic activity (3×) and stability (60×) for methanol oxidation were found, suggesting promising applications in direct methanol fuel cells. The 3× and 60× improvements persist for Pt/Pd catalysts used to overcome the CO poisoning problem.