Kinetic Study of Formic Acid Oxidation on Highly Dispersed Carbon Supported Pd–TiO2 Electrocatalyst

Abstract

The highly dispersed carbon supported Pd-TiO 2 catalyst was prepared by a liquid phase reduction method with intermittent microwave irradiation. The kinetic parameters, such as the charge transfer parameter (a) and the apparent diffusion coefficient (D) of formic acid electrooxidation on a carbon supported Palladium Titanium dioxide (Pd-TiO 2 /C) electrode were obtained under the quasi steady-state conditions. The dependence on temperature of the formic oxidation at a Pd-TiO 2 /C electrode was also investigated and the activation energy (E a ) at different potentials was obtained.

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

“…It was reported that Pd/C exhibited much better activity compared with Pt/C, however, the activity was not satisfactory and more importantly the durability of Pd/C catalyst was in urgent needed for further improvement. Generally, formic acid oxidation on Pd or Pt surface follows a dual pathway mechanism, namely, a dehydration pathway [42][43][44]:…”

“…Additionally, TiO2 can facilitate the dispersion of noble metal nanoparticles to anchor them. Based on the theory that TiO2 nanoparticles in the catalyst can adsorb OHads species and promote the oxidation reaction on the electrode, Xu et al [44] prepared highly dispersed carbon supported Pd-TiO2 catalyst with intermittent microwave irradiation. The activity of Pd-TiO2/C catalyst for the oxidation of formic acid was higher than that of the Pd/C catalyst [106].…”

Enhancement of ethanol oxidation on Pd nanoparticles supported on carbon-antimony tin oxide hybrids unveils the relevance of electronic effects

“…In particular, Pd and Pd-based catalysts were widely studied [17][18][19][20]. Although the number of published papers regarding the effects of transition-metal oxides is not as large as for Pt and Pt-based catalysts, enhancing effects of TiO 2 [21][22][23][24][25][26], CeO 2 [27][28][29] and other oxide supports [30][31][32][33][34][35] were reported for Pd.…”

Efficient hydrogen production from formic acid using TiO2-supported AgPd@Pd nanocatalysts

“…6 Therefore, it is expected that the catalytic activity of Ag@Pd core-shell nanocatalysts for formic acid decomposition in an aqueous solution can also be promoted by loading Ag@Pd core-shell nanocatalysts on TiO 2 . 6 Therefore, it is expected that the catalytic activity of Ag@Pd core-shell nanocatalysts for formic acid decomposition in an aqueous solution can also be promoted by loading Ag@Pd core-shell nanocatalysts on TiO 2 .…”