Pt nanoparticles supported on monodisperse carbon spheres for methanol oxidation in alkaline media
2013
Liu, Yong | Yang, Hao | Li, Xiying | Mao, Liqun
The Stöber method is extended to prepare carbon spheres (CS) by polymerizing resorcinol and formaldehyde. The obtained monodisperse CS are used as the supports of Pt nanoparticles for methanol oxidation in alkaline media. Compared with Pt supported on commercial Vulcan XC-72R carbon (Pt/C) electrocatalysts, Pt supported on carbon spheres (Pt/CS) electrocatalysts, which give peak current density 2.6 times higher and 100mV more negative shift toward methanol oxidation, shows better electrocatalytic activity. This is attributed to the higher electrochemical active surface area of Pt/CS with 56m²g⁻¹, as compared with that of Pt/C with 28m²g⁻¹.
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