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Citation: Sun Shi-Gang, Yang Yi-Yun. Kinetics of Irreversible Reactions on Platinum Single Crystal Electrodes II.Data Processing and Kinetics Parameters for HCOOH Oxidation on Pt(100) Electrode[J]. Acta Physico-Chimica Sinica, ;1997, 13(08): 673-679. doi: 10.3866/PKU.WHXB19970801 shu

Kinetics of Irreversible Reactions on Platinum Single Crystal Electrodes II.Data Processing and Kinetics Parameters for HCOOH Oxidation on Pt(100) Electrode

1.
State Key Laboratory for Physical Chemistry of the Solid Surface,Department of Chemistry,Institute of Physical Chemistry,Xiamen University,Xiamen 361005

Received Date: 15 November 1996
Available Online: 15 August 1997

The kinetics of electrooxidation of HCOOH on Pt(100) via reactive intermediates was studied by using programmed potential step technique, which avoided successfully the interference of self-poisoning. A new data processing method was established based on the transform of integration of digital data recorded in electrochemical transient experiments, and the computer software developed for this method allowed us to obtain quantitatively, for the first time, the kinetics parameters of HCOOH oxidation on Pt(100) electrode. The results demonstrated that in a narrow potential range of 0.02 V to 0.15 V, the rate constant kf being varied from 9.510 × 10-4 to 1.38 ×10-2cm•s- 1 and the relationship between ln(kf) and E being a straight line. The transfer coefficient (β) was calculated at 0.309, and the diffusion coefficient (D) of HCOOH in 5×10-3mol•L- 1 HCOOH + 0. 5mol•L- 1 H2SO4 solution was evaluated at 1.80 × 10-5 cm2•s-1.
- Pt(100) single crystal electrode,
- Oxidation of formic acid,
- Reaction kinetics;Data processing
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