{"help":"Return the metadata of a dataset (package) and its resources. :param id: the id or name of the dataset :type id: string","success":true,"result":[{"id":"0f856f80-b33c-441e-b548-db6ef2514d1c","name":"ammonia-synthesis-plasma-catalysis-atmospheric-rf-helium-plasma","title":"Ammonia synthesis by plasma catalysis in an atmospheric RF helium plasma","author_email":"Achim.vonKeudell@rub.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003EThe in-plasma-catalytic synthesis of ammonia from nitrogen and hydrogen admixed to a helium RF plasma is studied with infrared absorption spectroscopy, optical emission spectroscopy, and through chemical kinetics modeling. Sandblasted glass is used as support for iron, platinum, and copper catalysts up to a surface temperature of \\SI{150}{\\celsius}. It is shown that the optimum ammonia production occurs at very small N$_2$\/(N$_2$+H$_2$) ratios with an increase of concentration with plasma power. The global kinetic modelling agrees well with the data for a variation of the N$_2$+H$_2$ admixture and the absorbed plasma power. The introduction of the catalyst enhances ammonia production by up to a factor of 2. Based on the comparison with the modelling, this is linked to a change in the electron kinetics due to the presence of the catalyst.\u003Cbr \/\u003E\nIt is postulated that introducing the catalyst increases the reduced electric field because it reduces the secondary electron emission coefficient. As a result, the dissociation of N$_2$ is stimulated, thereby enhancing the NH$_3$ formation.\u003Cbr \/\u003E\nThese experiments show that the impact of the catalyst on the plasma performance in noble gas-diluted RF plasmas can be more important than the impact of the plasma on any catalytic surface process.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/ammonia-synthesis-plasma-catalysis-atmospheric-rf-helium-plasma","state":"Active","log_message":"Update to resource Model Fig. 8 and Fig. 9","private":true,"revision_timestamp":"Sun, 09\/28\/2025 - 21:17","metadata_created":"Sun, 05\/05\/2024 - 19:03","metadata_modified":"Sun, 09\/28\/2025 - 21:17","creator_user_id":"97d4ca9e-d6a4-435e-b2fa-290a5ce8358c","type":"Dataset","resources":[{"id":"1327e493-375e-4b04-a6c5-8908bc7812e4","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/VICurves.zip","description":"","format":"data","state":"Active","revision_timestamp":"Mon, 05\/13\/2024 - 10:47","name":"Data Fig. 4","mimetype":"application\/zip","size":"324.85 KB","created":"Sun, 05\/05\/2024 - 19:03","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Mon, 05\/13\/2024 - 10:47"},{"id":"1261ac19-29ad-49c0-b0d3-04405e6697ba","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/OESdata.zip","description":"","format":"data","state":"Active","revision_timestamp":"Mon, 05\/13\/2024 - 10:47","name":"Data Fig. 5","mimetype":"application\/zip","size":"1.61 KB","created":"Mon, 05\/13\/2024 - 10:42","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Mon, 05\/13\/2024 - 10:47"},{"id":"d8b017b8-e498-44b4-a6b5-db119cfab030","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/NH3densities.zip","description":"","format":"data","state":"Active","revision_timestamp":"Mon, 05\/13\/2024 - 10:47","name":"Data Fig. 6 and Fig. 7","mimetype":"application\/zip","size":"2.57 KB","created":"Mon, 05\/13\/2024 - 10:43","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Mon, 05\/13\/2024 - 10:47"},{"id":"4c26bc94-d7c5-4997-9be1-8645f4282f54","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/rateequationsparameters.zip","description":"\u003Cp\u003EList of rate equations with references, list of surface coefficients with references. Output of the model\u003C\/p\u003E\n","format":"zip","state":"Active","revision_timestamp":"Mon, 05\/13\/2024 - 10:46","name":"Model Fig. 8 and Fig. 9","mimetype":"application\/zip","size":"232.5 KB","created":"Mon, 05\/13\/2024 - 10:46","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Mon, 05\/13\/2024 - 10:46"}],"tags":[{"id":"b8e4e439-4227-4ff6-bada-fab9caf32896","vocabulary_id":"2","name":"catalysis"}],"groups":[{"description":"\u003Cp\u003EThe group \u0022Experimental Physics II - Reactive Plasmas\u0022 at the faculty of physics and astronomy at Ruhr University Bochum.\u003C\/p\u003E\n","id":"ec8154f9-454d-4b85-895c-f5e010310847","image_display_url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/rublogoweiss_0.png","title":"EP2","name":"group\/ep2"}]}]}