Electrodeposition of RuO₂ Layers on TiO₂ Nanotube Array toward CO₂ Electroreduction

Authors

Bei Jiang, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China;
Lina Zhang, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China;
Xianxian Qin, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China;
Wenbin Cai, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China;Follow

Corresponding Author

Wenbin Cai(wbcai@fudan.edu.cn)

Abstract

RuO₂/TiO₂ composite materials have multitude of electrocatalytic applications including but not limited to CO₂ reduction reaction (CO₂RR). RuO₂/TiO₂ electrodes were previously prepared by repetitive coating and thermal decomposition (TD) of a Ru(III) precursor solution on Ti substrate. In this work, electrochemical potential cycling is applied to deposit amorphous RuO₂ (α-RuO₂) layers onto TiO₂ nanotube array (TNA) (RuO₂^CV/TNA) preformed on Ti foil. SEM, GIXRD, and voltammetry are applied to characterize the structures of the resulting Ru_O2^CV/TNA. Ru loading on the RuO₂^CV/TNA electrode is ca. 1/30 of that on the conventional RuO₂^TD/TNA electrode. Although both electrodes yield similar faradaic efficiencies (FEs) for the reduction products, the RuO₂^CV/TNA electrode displays a much higher reduction current, a more positive initial reduction potential and a better durability than the RuO₂^TD/TNA one. In addition to higher FEs for formate and CH₄, the RuO₂^CV/TNA electrode yields the product of CO for the CO₂RR in 0.1 mo•lL^-1 KHCO₃, which is not available in a PBS solution with pH 7.

Graphical Abstract

Keywords

CO2 reduction, amorphous RuO2, TiO2 nanotube array, electrodeposition

DOI Link

https://doi.org/10.13208/j.electrochem.161253

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2017-04-28

Online Available Date

2017-04-28

Revised Date

2017-04-28

Received Date

2017-04-07

Recommended Citation

Bei Jiang, Lina Zhang, Xianxian Qin, Wenbin Cai. Electrodeposition of RuO₂ Layers on TiO₂ Nanotube Array toward CO₂ Electroreduction[J]. Journal of Electrochemistry, 2017 , 23(2): 238-244.
DOI: 10.13208/j.electrochem.161253
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss2/13