Temperature effects on COadsorption/desorption at Pt film electrodes: an electrochemical in situ infrared spectroscopic study
Literature Information
Bin Geng, Jun Cai, Sangzi Liang, Shao Xiong Liu, Ming Fang Li, Yan-Xia Chen
The effects of temperature, COad surface coverage, and electrode potential on the desorption of COad from Pt film electrodes in 0.5 M H2SO4 have been investigated by electrochemical in situ FTIR spectroscopy under an attenuated-total-reflection configuration (EC-FTIRS). The major findings are: (i) When θrel ≥ 0.53 (θCO is the relative COad coverage), COad desorption takes place at T > 40 °C (as confirmed by the decrease in both of the C–OL stretching frequency as well as the COad stripping charge), and when θrel is below 0.39, no COad desorption is observed at temperatures up to 70 °C; (ii) A slight increase in COad desorption rate with electrode potential from 0.1 to 0.3 V and fast adsorption/desorption equilibrium in solution saturated with CO are observed; (iii) From the temperature-dependent changes in COad surface coverage, the activation energies for COad desorption are determined to be in the range of 104 and 117 kJ mol−1, which increases with decreasing COad coverage.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.














