Current transient and in situ AFM studies of initial growth stages of electrochemically deposited nickel cobalt hydroxide nanosheet films

Literature Information

Publication Date 2016-03-29
DOI 10.1039/C6CP00709K
Impact Factor 3.676
Authors

Tuyen Nguyen, M. Fátima Montemor


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Abstract

Current transient evolution and in situ electrochemical AFM were used to study the initial stages of growth of electrochemically deposited nickel cobalt hydroxide films for energy storage applications. Current transients were taken at constant potentials, from −700 mV to −1000 mV, with a step of 50 mV. The current transients were fitted with three different nucleation models: Scharifker–Hill, Scharifker–Mostany and Mirkin–Nilov–Heerman–Tarallo and the results revealed that film growth was governed by a 3D instantaneous nucleation mechanism. In situ electrochemical AFM studies confirmed the instantaneous nucleation mechanism and revealed the early stage formation of nanosheets. The in situ AFM results were supported by the ex situ FEG-SEM results, showing the formation of nanoneedles at the first stages of nucleation and the growth into nanosheets with the increasing deposition time.

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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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