Microstructural impact of anodic coatings on the electrochemical chlorine evolution reaction

被引：81

作者：

Chen, Ruiyong ^{[1
]}

Trieu, Vinh ^{[1
]}

Zeradjanin, Aleksandar R. ^{[2
]}

Natter, Harald ^{[1
]}

Teschner, Detre ^{[3
]}

Kintrup, Juergen ^{[4
]}

Bulan, Andreas ^{[4
]}

Schuhmann, Wolfgang ^{[2
]}

Hempelmann, Rolf ^{[1
]}

机构：

[1] Univ Saarland, D-66123 Saarbrucken, Germany

[2] Ruhr Univ Bochum, D-44780 Bochum, Germany

[3] Max Planck Soc, Fritz Haber Inst, D-14195 Berlin, Germany

[4] Bayer Mat Sci AG, D-51368 Leverkusen, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 20期

关键词：

COATED TITANIUM ANODES; X-RAY-ABSORPTION; CHLORALKALI ELECTROLYSIS; WATER ELECTROLYSIS; SOLID-SOLUTIONS; HCL OXIDATION; IN-SITU; SURFACE; OXYGEN; BEHAVIOR;

D O I：

10.1039/c2cp41163f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sol-gel Ru0.3Sn0.7O2 electrode coatings with crack-free and mud-crack surface morphology deposited onto a Ti-substrate are prepared for a comparative investigation of the microstructural effect on the electrochemical activity for Cl-2 production and the Cl-2 bubble evolution behaviour. For comparison, a state-of-the-art mud-crack commercial Ru0.3Ti0.7O2 coating is used. The compact coating is potentially durable over a long term compared to the mud-crack coating due to the reduced penetration of the electrolyte. Ti L-edge X-ray absorption spectroscopy confirms that a TiOx interlayer is formed between the mud-crack Ru0.3Sn0.7O2 coating and the underlying Ti-substrate due to the attack of the electrolyte. Meanwhile, the compact coating shows enhanced activity in comparison to the commercial coating, benefiting from the nanoparticle-nanoporosity architecture. The dependence of the overall electrode polarization behaviour on the local activity and the bubble evolution behaviour for the Ru0.3Sn0.7O2 coatings with different surface microstructure are evaluated by means of scanning electrochemical microscopy and microscopic bubble imaging.

引用

页码：7392 / 7399

页数：8

共 51 条

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