A novel PdAg/TiO2 nanotube electrocatalyst was successfully prepared by the surface reductive deposition method and displacement reaction using TiO2 nanotube as support. The structural and electrochemical performances of the PdAg/TiO2 nanotube catalyst were characterized by XRD, TEM and electrochemical analysis. The PdAg/TiO2 nanotube electrocatalyst has shown promising catalytic activity for methanol electro-oxidation. The methanol oxidation mechanism of the PdAg/TiO2 nanotube catalyst mainly results from the photocatalytic mechanism of composite TiO2 material that has high catalytic activity without ultraviolet (UV) light illumination. The PdAg/TiO2 nanotube catalyst might become a promising candidate for direct methanol fuel cell.
This work was supported by the Research Foundation of the six people peak of Jiangsu Province (2010-XNY-002), Jiangsu Overseas research & Training Programme for University Prominent Young & Middle-aged Teachers and Presidents, the National Natural Science Foundation of China (11172231), DARPA (W91CRB-11-C-0112), and the National Science Foundation (CMMI-0643726).
- Direct methanol fuel cell
- Methanol electro-oxidation
- Titanium dioxide nanotube