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
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...
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2021
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oai:doaj.org-article:f6917f48613143aa8bcba399c70a3f8f2021-11-23T18:40:52ZImprovement of stability and reduction of energy consumption for Ti-based MnOx electrode by Ce and carbon black co-incorporation in electrochemical degradation of ammonia nitrogen0273-12231996-973210.2166/wst.2021.421https://doaj.org/article/f6917f48613143aa8bcba399c70a3f8f2021-11-01T00:00:00Zhttp://wst.iwaponline.com/content/84/9/2278https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Ti-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.;Jiao ZhaoXuelu XuZehui LiuXiaodan BaiYan YangXiaoyi LiYin WangWeifeng LiuYimin ZhuIWA Publishingarticleammonia nitrogen (nh4+-n)electrochemical oxidationmnoxti-based electrodeswastewater remediationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 9, Pp 2278-2287 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
ammonia nitrogen (nh4+-n) electrochemical oxidation mnox ti-based electrodes wastewater remediation Environmental technology. Sanitary engineering TD1-1066 |
| spellingShingle |
ammonia nitrogen (nh4+-n) electrochemical oxidation mnox ti-based electrodes wastewater remediation Environmental technology. Sanitary engineering TD1-1066 Jiao Zhao Xuelu Xu Zehui Liu Xiaodan Bai Yan Yang Xiaoyi Li Yin Wang Weifeng Liu Yimin Zhu 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 |
| description |
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.; |
| format |
article |
| author |
Jiao Zhao Xuelu Xu Zehui Liu Xiaodan Bai Yan Yang Xiaoyi Li Yin Wang Weifeng Liu Yimin Zhu |
| author_facet |
Jiao Zhao Xuelu Xu Zehui Liu Xiaodan Bai Yan Yang Xiaoyi Li Yin Wang Weifeng Liu Yimin Zhu |
| author_sort |
Jiao Zhao |
| title |
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 |
| title_short |
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 |
| title_full |
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 |
| title_fullStr |
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 |
| title_full_unstemmed |
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 |
| title_sort |
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 |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/f6917f48613143aa8bcba399c70a3f8f |
| work_keys_str_mv |
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1718416190193270784 |