Physical and electrochemical properties of cobalt doped (Ti,Ru)O-2 electrode coatings
Journal article, 2013
The physical and electrochemical properties of ternary oxides Ti0.7Ru0.3-xCoxO2 (x = 0.093 and x = 0) have been investigated and compared. Samples of three different thicknesses were prepared by spin-coating onto polished titanium to achieve uniform and well-defined coatings. The resulting electrodes were characterized with a variety of methods, including both physical and electrochemical methods. Doping with cobalt led to a larger number of micrometer-sized cracks in the coating, and coating grains half the size compared to the undoped samples (10 instead of 20 nm across). This is in agreement with a voltammetric charge twice as high, as estimated from cyclic voltammetry. There is no evidence of a Co3O4 spinel phase, suggesting that the cobalt is mainly incorporated in the overall rutile structure of the (Ti,Ru)O-2. The doped electrodes exhibited a higher activity for cathodic hydrogen evolution compared to the undoped electrodes, despite the fact that one third of the active ruthenium was substituted with cobalt. For anodic chlorine evolution, the activity was similar for both electrode types. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
Cobaltdoping
Polarization curves
RUO2-DOPED NI/CO3O4 ELECTRODES
CHLORINE EVOLUTION
CATHODIC BEHAVIOR
HYDROGEN EVOLUTION
Chlorine evolution
DSA (R)
Hydrogen evolution
PHYSICOCHEMICAL CHARACTERIZATION
THERMAL-DECOMPOSITION
SURFACE CHARACTERIZATION
ALKALINE-SOLUTIONS
XRD
OXYGEN EVOLUTION
OXIDE THIN-FILMS
Author
C. Hummelgard
Mid Sweden University
R. K. S. Karlsson
Royal Institute of Technology (KTH)
Joakim Bäckström
Mid Sweden University
Habibur Seikh Mohammad Rahman
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Ann Cornell
Royal Institute of Technology (KTH)
Sten Eriksson
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Håkan Olin
Mid Sweden University
Materials Science & Engineering B: Solid-State Materials for Advanced Technology
0921-5107 (ISSN)
Vol. 178 20 1515-1522Subject Categories
Materials Engineering
DOI
10.1016/j.mseb.2013.08.018