Xu, Wei, Du, Dongwei, Lan, Rong, Humphreys, John, Miller, David N., Walker, Marc, Wu, Zucheng, Irvine, John T. S. and Tao, Shanwen (2018) Electrodeposited NiCu bimetal on carbon paper as stable non-noble anode for efficient electrooxidation of ammonia. Applied Catalysis B: Environmental, 237 . pp. 1101-1109. doi:10.1016/j.apcatb.2016.11.003 ISSN 0926-3373.

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Abstract

Electrochemical remediation of ammonia-containing wastewater at low cell voltage is an energy-effective technology which can simultaneously recover energy via hydrogen evolution reaction. One of the main challenges is to identify a robust, highly active and inexpensive anode for ammonia electrooxidation. Here we present an alternative anode, prepared by electrochemical co-deposition of Ni and Cu onto carbon paper. This NiCu bimetallic catalyst is characterised by scanning electron microscope, scanning transmission electron microscope, X-ray diffraction, x-ray photoelelectron spectroscopy, cyclic voltammetry, linear sweep voltammetry and chronoamperometry techniques. The stability and activity of NiCu bimetallic catalyst are largely improved in comparison with Ni or Cu catalyst. Moreover this noble-metal-free NiCu catalyst even performs better than Pt/C catalyst, as NiCu is not poisoned by ammonia. An ammonia electrolysis cell is fabricated with NiCu/carbon paper as anode for ammonia electrolysis. The influences of pH value, applied cell voltages and initial ammonia concentration on cell current density, ammonia removal and energy efficiency are tested. An ammonia removal efficiency of ∼80% and coulombic efficiency up to ∼92% have been achieved. Ni-Cu bimetal on carbon paper is a stable non-noble anode for efficient electrooxidation of ammonia.

Item Type:	Journal Article
Subjects:	T Technology > TD Environmental technology. Sanitary engineering
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Ammonia, Anodes, Sewage
Journal or Publication Title:	Applied Catalysis B: Environmental
Publisher:	Elsevier BV
ISSN:	0926-3373
Official Date:	5 December 2018
Dates:	Date Event 5 December 2018 Published 2 November 2016 Available 1 November 2016 Accepted
Volume:	237
Page Range:	pp. 1101-1109
DOI:	10.1016/j.apcatb.2016.11.003
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	14 November 2016
Date of first compliant Open Access:	14 November 2016
Funder:	Engineering and Physical Sciences Research Council (EPSRC), China Scholarship Council (CSC)
Grant number:	EP/G01244X/1, EP/L017008/1 (EPSRC)
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID EP/G01244X/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 EP/L017008/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 UNSPECIFIED China Scholarship Council (CSC) http://dx.doi.org/10.13039/501100004543

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