Characteristic cyclic voltammograms of alkyl viologens at single crystal gold electrodes

Literature Information

Publication Date 2002-02-13
DOI 10.1039/B109879A
Impact Factor 3.676
Authors

Kazuki Arihara, Takeo Ohsaka, Fusao Kitamura


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Abstract

Symmetric dialkyl viologens showed characteristic current response in their cyclic voltammograms (CVs) depending on the atomic arrangement of the gold electrode surfaces. Several sharp peaks responsible for the adsorption of the alkyl viologens in the monolayer were observed at Au(111), Au(100) and Au(110) electrodes in a potential region that is more positive than the main reduction waves. The current peaks appeared irregularly independent of the alkyl chain length in contrast to the case of mercury and HOPG electrodes. It was pointed out that the CV features of the alkyl viologens were analogous to those of the metal UPD processes, which may reflect similar adsorption processes. The recrystallization occurred more easily on the electrode surfaces in the order Au(110) < Au(111) < Au(100), which indicated that the states of the bulk accumulated viologen cation radical layer were influenced by the atomic arrangement of the gold electrode surfaces, i.e. the adsorption structure of the first adlayer on them.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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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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