The Opportunities and Challenges for NH3 Oxidation with 100% Conversion and Selectivity

The selective catalytic oxidation of ammonia (SCO) to N-2 seems to be the most promising technology to remove NH3. Compared with electrocatalytic and photocatalytic ammonia oxidation technology, the thermal catalytic oxidation ammonia technology was sufficient to support large-scale commercial and industrial applications. The NH3-SCO reaction was strongly obeyed the reaction routes of imide, hydrazinium-type and iSCR mechanism. Further, in situ (electron paramagnetic resonance) EPR spectroscopy combined with DFT calculation could provide a foundation for the design and construction of highly efficient ammonia oxidation catalyst. Finally, important ideas for NH3-SCO should be given the 100% N-2 selectivity and higher NH3 conversion at lowest temperature. If Ag single-atoms were inserted in the tunnels of zeolites or MOF to result in single Ag atoms anchored at the tunnel, this single-atom Ag particles exhibited super NH3 conversion, N-2 selectivity and hydrothermal durability at low temperatures.

Automated summary

Selective catalytic oxidation of ammonia (SCO) to N-2 is a promising technology. Experimental results show that anchoring single Ag atoms in material channels can achieve high NH3 conversion and N-2 selectivity at low temperatures.