AI Article Synopsis
- A carbon-supported palladium (Pd) electrocatalyst is created using an enhanced aqueous impregnation method with HCHO as a reducing agent and HCl as an acidic promoter.
- The study examines how solution pH affects the zeta potential of both Pd particles and carbon support, leading to uniform dispersion of Pd without aggregation.
- Results show that at a pH of 4.27, the catalyst has a mean particle diameter of 3.2 nm, and it demonstrates a higher electrochemical active surface area and stability compared to commercial 40 wt.% Pd/C during formic acid oxidation.
Article Abstract
Carbon-supported Pd electrocatalyst is prepared by an improved aqueous impregnation method applying a reducing agent of HCHO and an acidic sedimentation promoter of HCl. We investigate the effect of a solution pH on the zeta potential of both Pd particles and carbon support. The opposite sign of zeta potential results in uniform dispersion of Pd on carbon surface without aggregation problem. TEM analysis shows that optimal solution pH of 4.27 adjusted by NaOH provides a mean particle diameter of 3.2 nm with narrow size distribution. Cyclic voltammograms indicate that home-made Pd/C catalyst exhibits significantly higher electrochemical active surface area and better stability compared with commercial 40 wt.% Pd/C in a formic acid oxidation.
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| http://dx.doi.org/10.1166/jnn.2011.4829 | DOI Listing |
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