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17 maj 2011 · The charge densities associated with UPD-H, UPD-Cu, and CO/H displacement have been exploited to evaluate the ECAs of various Pt electrodes, i.e., polycrystalline Pt electrodes with different roughness factors (RF), Pt thin films chemically deposited onto a silicon (Si) surface, and electrodes composed of Pt nanoparticles (Pt/Vulcan from E-tek ...
1 wrz 2011 · Differential electrochemical mass spectrometry was demonstrated for the first time to resolve H OPD and H UPD by measuring the H 2 evolved from water by the hydrogen evolution reaction at the cathode (a Pt electrode) of a proton exchange membrane fuel cell (PEMFC).
15 sie 2022 · Highlights • Influence of carbon support on ECSA determination of Pt/C has been investigated. • Carbon corrosion during AST leads to significant change in baselines for H ad & H de area. • Baselines using the corresponding C show almost identical charge for H ad & H de area. •
1 cze 2013 · Abstract. The electrochemical surface area (ECA) calculation was studied using the charges associated with stripping of CO and underpotentially deposited H and Cu on highly dispersed Pt- and Pd-based nanoparticles. The surface areas followed a general trend of H UPD < CO striping < Cu UPD.
3 sty 2016 · The electrochemical surface area (ECSA) of Pt-based electrocatalysts was calculated from the hydrogen adsorption/ desorption region of the CV curves after correcting for the double layer charging...
13 gru 2016 · In this study we investigated CO stripping and the ratio between Pt surface areas measured by CO and by HAD on several Pt and Pt alloy catalysts. The effects on these measurements of temperature and catalyst aging by voltage cycling are discussed.
10 cze 2014 · For Pt 2.5 Ni octahedral nanoparticles, they observed a twofold decrease in catalytic ORR activity after using CO stripping and hypothesized that CO may induce surface compositional changes. In this work, we compare and contrast experimental ECSA values based on H upd and CO stripping.
