Journal article

Plasma Catalytic Synthesis of Ammonia Using Functionalized-Carbon Coatings in an Atmospheric-Pressure Non-equilibrium Discharge

Jungmi Hong, Morteza Aramesh, Olga Shimoni, Dong Han Seo, Samuel Yick, Amelia Greig, Christine Charles, Steven Prawer, Anthony B Murphy

PLASMA CHEMISTRY AND PLASMA PROCESSING | SPRINGER | Published : 2016

Abstract

We investigate the synthesis of ammonia in a non-equilibrium atmospheric-pressure plasma using functionalized-nanodiamond and diamond-like-carbon coatings on α-Al2O3 spheres as catalysts. Oxygenated nanodiamonds were found to increase the production yield of ammonia, while hydrogenated nanodiamonds decreased the yield. Neither type of nanodiamond affected the plasma properties significantly. Using diffuse-reflectance FT-IR and XPS, the role of different functional groups on the catalyst surface was investigated. Evidence is presented that the carbonyl group is associated with an efficient surface adsorption and desorption of hydrogen in ammonia synthesis on the surface of the nanodiamonds, a..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council


Funding Acknowledgements

The authors are grateful for the help and useful advice from Drs. Avi Bendavid, Jawad Haidar, Shailesh Kumar and Gerard de Groot of CSIRO and Drs Errol Atkinson and Erik Thorvaldson of the Australian Government's National Measurement Institute. Aspects of this research made use of software developed by the Inversion Laboratory (Ilab). Ilab is a part of the Auscope AGOS project-an initiative of the Australian Government funded through the Education Investment Fund. This research was partially funded by Australian Research Council Discovery Project (DP140100571).