Engineered Electronic States of Transition Metal Doped TiO2 Nanocrystals for Low Overpotential Oxygen Evolution Reaction

Title
Engineered Electronic States of Transition Metal Doped TiO2 Nanocrystals for Low Overpotential Oxygen Evolution Reaction
Author(s)
손영구로이[로이]리융[리융]프라드한[프라드한]
Keywords
TITANIUM-DIOXIDE ANATASE; PHOTOCATALYTIC ACTIVITY; SINGLE-CRYSTALS; WATER OXIDATION; OXIDE SURFACES; RAMAN-SPECTRA; RUTILE; FILMS; IRON; ELECTROCATALYSTS
Issue Date
201412
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.118, no.51, pp.29499 - 29506
Abstract
Electrochemical oxygen evolution reaction (OER) involves high overpotential at the oxygen evolving electrode and thereby suffers significant energy loss in the proton exchange membrane water electrolyzer. To reduce the OER overpotential, precious ruthenium and iridium oxides are most commonly used as anode electrocatalyst. Here we report marked reduction in overpotential for the OER using transition metal (TM) doped TiO2 nanocrystals (NCs). This reduction in overpotential is attributed to d-orbitals splitting of the doped TMs in the TM-doped TiO2 NCs and their interactions with the oxyradicals (intermediates of OER) facilitating the OER. The d-orbital spitting of TMs in TM-doped TiO2 NCs is evident from the change in original pearl white color of undoped TiO2 NCs and UVvis absorption spectra.
URI
http://hdl.handle.net/YU.REPOSITORY/30353http://dx.doi.org/10.1021/jp508445t
ISSN
1932-7447
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이과대학 > 화학생화학부 > Articles
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