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30 cze 2010 · This tutorial should enable more researchers to determine the three critical catalyst parameters: (1) electrochemical surface area, (2) Pt mass-specific activity (I m), and (3) Pt area-specific activity (I s), which are indispensible measures of true ORR catalyst activity.
1 wrz 2000 · The presence of surface rugosities due to steps, holes, kinks, and terraces can result in an electrode real surface area that is larger than the geometric one. The electrode real surface area can be evaluated by determining the amount of gas that adsorbs onto the electrode surface.
1 wrz 2000 · This Pt disk electrode active area was determined to be 0.158 cm 2 via traditional hydrogen adsorption experiments in 0.5 M H 2 SO 4 electrolyte following the literature.
The active Pt surface areas of UMEs were calculated assuming an H-upd monolayer adsorption charge on a polycrystalline Pt electrode of 0.21 mC cm −2 , an H-upd coverage at the onset of H 2...
17 maj 2011 · In this contribution, we present a systematic and quantitative analysis of different methods used for the determination of the ECAs of Pt-based electrocatalysts.
8 sie 2023 · H 2-TPR was used to probe reactions of H 2 on Pt/CeO 2. H 2-TPR is often used to assess the reducibility (e.g., V o formation) of oxide surfaces. However, H 2-TPR only directly assesses the rate of H 2 consumption during a temperature increase.
10 cze 2014 · This study intends to provide some insight in the up-to-date elusive assessment of a correct choice of method for estimating the active surface area of Pt alloy nanoparticle catalysts.
