Physical and electrochemical properties of cobalt doped (Ti,Ru)O-2 electrode coatings
Artikel i vetenskaplig tidskrift, 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

Författare

C. Hummelgard

Mittuniversitetet

R. K. S. Karlsson

Kungliga Tekniska Högskolan (KTH)

Joakim Bäckström

Mittuniversitetet

Habibur Seikh Mohammad Rahman

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Ann Cornell

Kungliga Tekniska Högskolan (KTH)

Sten Eriksson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Håkan Olin

Mittuniversitetet

Materials Science & Engineering B: Solid-State Materials for Advanced Technology

0921-5107 (ISSN)

Vol. 178 1515-1522

Ämneskategorier

Materialteknik

DOI

10.1016/j.mseb.2013.08.018