Adsorption on graphene: flat to edge to end transitions of phenyl hydroquinone

Literature Information

Publication Date 2017-06-22
DOI 10.1039/C7CP03261G
Impact Factor 3.676
Authors

Lifu Chen, Eden E. L. Tanner, Richard G. Compton


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Abstract

The adsorption of phenyl hydroquinone (PHQ) on graphene surfaces at the liquid–solid interface is investigated revealing a flat orientation and two different vertically adsorbed states of PHQ on graphene nanoplatelets (GNPs), namely edgewise or endwise adsorption. The transition between these states is driven by increasing concentrations of PHQ in solution leading to increased absolute coverages on the graphene surface. At low adsorbate concentrations (≤21 mM), the adsorption process is also shown to be Langmuirian with an adsorption constant of (9.5 ± 0.2) mM−1. Independent measurements are conducted using a single particle electrochemical technique to confirm the surface coverage of PHQ on GNPs at low concentrations, showing excellent agreement with the UV-Vis studies.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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