Next Article in Journal
Combustion Synthesis of UHTC Composites from Ti–B4C Solid State Reaction with Addition of VIb Transition Metals
Previous Article in Journal
Predicting the Wear of High Friction Surfacing Aggregate
Previous Article in Special Issue
Statistical Determination of a Fretting-Induced Failure of an Electro-Deposited Coating
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Coatings 2017, 7(6), 72; doi:10.3390/coatings7060072

Ammonia Generation via a Graphene-Coated Nickel Catalyst

Center for Electrochemical Engineering Research (CEER), Chemical and Biomolecular Engineering Department, Ohio University, Columbus, OH 43210, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Jordi Sort and Eva Pellicer
Received: 25 March 2017 / Revised: 7 May 2017 / Accepted: 16 May 2017 / Published: 27 May 2017
(This article belongs to the Special Issue Thin Films and Patterned Structures by Electrochemical Methods)
View Full-Text   |   Download PDF [6159 KB, uploaded 27 May 2017]   |  

Abstract

A novel graphene-coated Ni electrode was developed in this investigation to improve corrosion resistance while unexpectedly enhancing the ammonia generation rate in the electrochemically induced urea to ammonia (eU2A) process, which is an electrochemical onsite ammonia generation method. The development of the electrode is crucial for the eU2A reactions since in the ammonia generation process, the concentration of ammonia is inevitably high on the surface of the electrode, leading to severe corrosion of the electrode and the loss of generated ammonia as well. In this paper, the graphene was derived from raw coal by using the chemical vapor deposition method and self-lifted onto a Ni electrode to form a protective layer for corrosion prevention. Transmission electron microscopy showed the synthesized graphene had few-layers and Raman spectroscopy indicated that the coating of graphene was stable during the eU2A reaction. As a result, the ammonia corrosion of the Ni electrode was dramatically reduced by ~20 times with the graphene coating method. More importantly, a higher ammonia generation rate (~2 times) was achieved using the graphene-coated Ni working electrode compared to a bare Ni electrode in the eU2A process. View Full-Text
Keywords: ammonia corrosion; ammonia generation; urea to ammonia; chemical vapor deposition; graphene coated Ni ammonia corrosion; ammonia generation; urea to ammonia; chemical vapor deposition; graphene coated Ni
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Lu, F.; Botte, G.G. Ammonia Generation via a Graphene-Coated Nickel Catalyst. Coatings 2017, 7, 72.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top