Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
180788 | Electrochemistry Communications | 2010 | 4 Pages |
Abstract
Direct (non-mediated) electrochemical oxidation of ammonia on boron-doped diamond (BDD) electrode proceeds mainly at high pH (> 8) via free ammonia (NH3) oxidation. To enhance ammonia oxidation on BDD at low pH (< 8), where mainly ammonium (NH4+) is present, oxidation of ammonia was mediated by active free chlorine. In this process, electro-generated in situ active chlorine rapidly reacts with ammonia instead of being further electro-oxidized to chlorate at the electrode surface. Thus, active chlorine effectively removes ammonia from an acidic solution, while the formation of by-products such as chlorate and possibly perchlorate is minimized.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Agnieszka Kapałka, Lisa Joss, Ángela Anglada, Christos Comninellis, Kai M. Udert,