Preparation of a novel Cu-Sn-Bi cathode and performance on nitrate electroreduction

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Weichun GaoJiyan Liang

Abstract

Cu-Sn-Bi layer coated on Ti substrate was prepared using electrodeposition method and applied as cathode material for electrochemical reduction of nitrate in this research. Linear sweep voltammetry (LSV), chronoamperometry (CA), scanning electron microscope (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) were used to scrutinize the electrochemical performance and the cathode materials. LSV results illustrated that Cu-Sn-Bi cathode possessed the ability for nitrate reduction. Preparation conditions including deposition time, current density, temperature and the content of Bi were optimized based on NO3-N removal and byproducts selectivity. Results showed that the cathode with Bi content of 3.18 at.%, and electrodepositing at current density of 6 mA cm-2, 35 °C for 30 min achieved the best performance during the experiment. The increase of Bi content could improve the electrocatalytic activity and stability of the cathode. Compared with other common researched cathodes (Cu and Fe), Cu-Sn-Bi (3.18 at.%) exhibited better performance, i.e. the highest NO3-N removal of 88.43% and the selectivity of harmless N2 was 77.80%. The kinetic studies showed that the reduction of nitrate on Cu-Sn-Bi followed pseudo-first-o...Continue Reading

References

Apr 9, 2001·Environmental Pollution·M Shrimali, K P Singh
Sep 23, 2008·Journal of Hazardous Materials·Oscar PrimoInmaculada Ortiz
Jan 17, 2009·Applied Microbiology and Biotechnology·Jae Yeon Park, Young Je Yoo
Apr 7, 2010·Bioresource Technology·Miao LiNorio Sugiura
Sep 11, 2012·American Journal of Otolaryngology·Peter F SviderJean Anderson Eloy

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Citations

Oct 30, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Judah MakoverHilla Shemer

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