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- Title
Synthesis and electrochemical study of La-doped RuO<sub>2</sub>-TiO<sub>2</sub>/Ti coatings.
- Authors
XIAOYU JIANG; SHUAI LI; ZHIGANG ZHANG; HANG XIAO; WEIQIN WU; LANG LIN; XIAOYUAN WU; WEI LI; LEI ZHANG; WENZHE CHEN
- Abstract
La-doped RuO2-TiO2/Ti coating (TRL) and RuO2-TiO2/Ti coating (TR) were prepared by the sol-gel method and thermal treatment. The products were characterized by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM). The electrochemical properties were investigated by cyclic voltammetry and polarization measurements in O2 and Cl2 evolution in H2SO2 and NaCl solution. The XRD analysis showed that in both TRL and TR, the particles of the synthesized coatings were of low crystallinity, and that they were mainly formed of two phases, rutile TiO2 and RuO2. SEM confirmed that the surface of TRL and TR coatings had a cracked mud appearance consisting of blocks separated by cracks. The morphology of the TRL coating shows irregular crack blocks, which increased the specific area greatly and provides more active sites. Polarization measurements indicate that the onset potential of chlorine evolution reaction for TRL coating was 1.08 VSCE, which is lower than the value of 1.12 VSCE registered for the TR coating. The onset potentials for oxygen evolution for the two coatings were similar. Cyclic voltammetry shows an improvement of the electrochemical capacity for the La-doped coatings.
- Subjects
ELECTROCHEMISTRY; TITANIUM oxides; SURFACE coatings; X-ray diffraction; VOLTAMMETRY
- Publication
Journal of the Serbian Chemical Society, 2018, Vol 83, Issue 9, p995
- ISSN
0352-5139
- Publication type
Article
- DOI
10.2298/JSC170831033J