This work discusses the effect of the carbon morphology in binderless nanostructured Pt catalyst on the oxygen reduction reaction (ORR). In summary, we have examined five type of carbon, the carbon paper (CP), carbon sphere chains (CSC), carbon nanofibers (CNF), carbon nanotubes (CNT) and carbon nanohorns (CNH). On the surface of each carbon, Pt was deposited by considering three morphologies, well-spread nanoparticles, smooth film and porous film. In a deaerated H2SO4 solution, highly interconnected Pt NPs (smooth film and columnar-like arranged NPs) displayed weakened oxophilicity as compared with spread Pt NPs. In O2-saturated 0.5 M H2SO4 solutions, the onset potential and half-wavepotential for the ORR imply that Pt supported by carbons of tubular form such as the CNF, CNT or CNH are superior catalyst supports. More markedly, it seems that the dimensions (diameter and length) is irrelevant since the three carbons (CNF, CNT, CNH) displayed similar supporting properties regarding either the onset potential or the half-wave potential of ORR.
|Number of pages||9|
|Journal||International Journal of Electrochemical Science|
|Publication status||Published - 21 Dec 2012|
- Carbon nanostructures
- Morphology effect
- Oxygen electroreduction
ASJC Scopus subject areas