The influence of mass-transport conditions on the ethanol oxidation reaction (EOR) mechanism of Pt/C electrocatalysts
Literature Information
Carsten Cremers
This study aims to provide further understanding of the influence of different parameters that control mass-transport (the revolution rate of the rotating disk electrode and the potential scan rate) on the ethanol oxidation reaction (EOR). The experiments were conducted on a home-made carbon-supported 20 wt% Pt/C electrocatalyst, synthesized using a modified polyol method, and characterized in terms of physicochemical properties by thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). The EOR at the thin active layer of this electrocatalyst was characterized using both differential electrochemical mass spectrometry (DEMS) in a flow cell configuration and the rotating disc electrode (RDE). The results demonstrate that operating under stationary conditions (low scan rate and high RDE speed) hinders complete ethanol electrooxidation into CO2 and favors the poisoning of the electrocatalyst surface by hydroxide and strong ethanol adsorbates. As such, the EOR appears to be more efficient and faster under dynamic conditions than in near steady-state.
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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.










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