Ammonia Slip CATalysts (ASCAT)- Operando STM
A technology that meets the challenge of zero NOx release from the diesel powered transport sector is lacking. We work on a new concept (see Figure below) dedicated to this vison, which involves the following steps:
- a Selective Catalytic Reduction (SCR) catalyst over which NOx is reduced to nitrogen in excess ammonia;
- oxidation of unreacted ammonia to nitrogen. Adding the second step allows for complete NOx reduction and prevents release of NH3.
Focusing on the step 2., we are developing a next generation ammonia oxidation catalyst, based on bimetallic noble metal alloys, which selectively oxidizes ammonia to N2 (and not N2O and NO) at 200-400 °C and at ambient pressure.
Ass.Prof. Irene M. N. Groot (University of Leiden, NL)
- ReactorSTM at UiO
- UHV-XPS and ReactorSTM at University of Leiden (NL)
- AP-XPS at Advanced Light Source, Berkley (USA)