Print Email Facebook Twitter Overcoming Nitrogen Reduction to Ammonia Detection Challenges Title Overcoming Nitrogen Reduction to Ammonia Detection Challenges: The Case for Leapfrogging to Gas Diffusion Electrode Platforms Author Kolen, M. (TU Delft ChemE/Materials for Energy Conversion and Storage) Ripepi, D. (TU Delft ChemE/Materials for Energy Conversion and Storage) Smith, W.A. (TU Delft ChemE/Materials for Energy Conversion and Storage) Burdyny, T.E. (TU Delft ChemE/Materials for Energy Conversion and Storage) Mulder, F.M. (TU Delft ChemE/Materials for Energy Conversion and Storage) Date 2022 Abstract The nitrogen reduction reaction (NRR) is a promising pathway toward the decarbonization of ammonia (NH3) production. However, unless practical challenges related to the detection of NH3 are removed, confidence in published data and experimental throughput will remain low for experiments in aqueous electrolyte. In this perspective, we analyze these challenges from a system and instrumentation perspective. Through our analysis we show that detection challenges can be strongly reduced by switching from an Hcell to a gas diffusion electrode (GDE) cell design as a catalyst testing platform. Specifically, a GDE cell design is anticipated to allow for a reduction in the cost of crucial 15N2 control experiments from €100−2000 to less than €10. A major driver is the possibility to reduce the 15N2 flow rate to less than 1 mL/min, which is prohibited by an inevitable drop in mass-transport at low flow rates in H-cells. Higher active surface areas and improved mass transport can further circumvent losses of NRR selectivity to competing reactions. Additionally, obstacles often encountered when trying to transfer activity and selectivity data recorded at low current density in Hcells to commercial device level can be avoided by testing catalysts under conditions close to those in commercial devices from the start. Subject ammoniadetectionnitrogen reductiongas diffusion electrodecatalyst To reference this document use: http://resolver.tudelft.nl/uuid:b8eb71f4-8888-4346-9394-b984e380ed99 DOI https://doi.org/10.1021/acscatal.2c00888 ISSN 2155-5435 Source ACS Catalysis, 12, 5726-5735 Part of collection Institutional Repository Document type review Rights © 2022 M. Kolen, D. Ripepi, W.A. Smith, T.E. Burdyny, F.M. Mulder Files PDF acscatal.2c00888.pdf 1.69 MB Close viewer /islandora/object/uuid:b8eb71f4-8888-4346-9394-b984e380ed99/datastream/OBJ/view