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Synthesis of MnO x Water Oxidation Catalyst on Fluorine‐Doped Tin Oxide with a Dual‐Series Cyclic Voltammetry Method
Author(s) -
Yuan Hao,
Lunt Richard R.,
Blanchard Gary J.,
Ofoli Robert Y.
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500518
Subject(s) - cyclic voltammetry , tin oxide , catalysis , materials science , amperometry , scanning electron microscope , chemical engineering , transmission electron microscopy , tin , oxidation state , oxide , inorganic chemistry , electrochemistry , analytical chemistry (journal) , nanotechnology , chemistry , electrode , composite material , metallurgy , organic chemistry , engineering
Abstract This Communication reports a new method for synthesizing manganese‐based water oxidation catalysts in situ in aqueous media. The method provides powerful tunability of the electrodeposition process to enable independent control over the morphology of the catalytic film and the oxidation state of the catalyst. Our results show that the first cyclic voltammetry (CV) series produces a film with a nanoscale fibrous structure, whereas the second CV series improves its catalytic performance by enhancing the oxidation state of the film without damaging the existing surface morphology. Scanning electron microscopy and transmission electron microscopy were used to characterize the morphology of the MnO x film, CV was used to assess the catalyst functionality, and long‐term amperometry was used to assess the stability.