Improvement of stability and reduction of energy consumption for Ti-based MnOx electrode by Ce and carbon black co-incorporation in electrochemical degradation of ammonia nitrogen
| Autor: | Xiaoyi Li, Bai Xiaodan, Jiao Zhao, Yimin Zhu, Weifeng Liu, Xuelu Xu, Yan Yang, Yin Wang, Zehui Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Materials science ammonia nitrogen (nh4+-n) Sulfuric acid Carbon black Electrochemistry Environmental technology. Sanitary engineering Catalysis Ammonia nitrogen ti-based electrodes chemistry.chemical_compound Chemical engineering chemistry Electrode mnox Degradation (geology) electrochemical oxidation Layer (electronics) TD1-1066 Water Science and Technology wastewater remediation |
| Zdroj: | Water Science and Technology, Vol 84, Iss 9, Pp 2278-2287 (2021) |
| ISSN: | 1996-9732 0273-1223 |
| Popis: | Ti-based electrode coated with MnOx catalytic layer has presented superior electrochemical activity for degradation of organic pollution in wastewater, however, the industrial application of Ti-based MnOx electrode is limited by the poor stability of the electrode. In this study, the novel Ti-based MnOx electrodes co-incorporated with rare earth (Ce) and conductive carbon black (C) were prepared by spraying-calcination method. The Ti/Ce:MnOx-C electrode, with uniform and integrated surface and enhanced Mn(IV) content by C and Ce co-incorporation, could completely remove ammonia nitrogen (NH4+-N) with N2 as the main product. The cell potential and energy consumption of Ti/Ce:MnOx-C electrode during the electrochemical process was significantly reduced compared with Ti/MnOx electrode, which mainly originated from the enhanced electrochemical activity and reduced charge transfer resistance by Ce and C co-incorporation. The accelerated lifetime tests in sulfuric acid showed that the actual service lifetime of Ti/Ce:MnOx-C was ca. 25 times that of Ti/MnOx, which demonstrated the significantly promoted stability of MnOx-based electrode by Ce and C co-incorporation. HIGHLIGHTS The Ti-based MnOx electrodes co-incorporated with Ce and C were prepared and served as electrocatalysts to remove ammonia nitrogen.; The cell potential and energy consumption of Ti/Ce:MnOx-C was reduced by 35% compared with Ti/MnOx, originating from the enhanced activity and reduced resistance.; The service lifetime of Ti/Ce:MnOx-C was improved by 25 times compared with Ti/MnOx, demonstrating the promoted stability. |
| Databáze: | OpenAIRE |
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