Nathan Smith’s research while affiliated with University of Alabama in Huntsville and other places

... Hydrocarbons have been used to decrease the required temperature for the catalytic decomposition of N 2 O [42]. Although most developed bipropellants using N 2 O/C 3 H 8 have utilized catalyst beds [43,44], direct arc ignition of the N 2 O-hydrocarbon has been applied commercially in chemical thrusters with growing space heritage [32]. Among the considered storable hydrocarbons, C 3 H 8 offers low pressure, which will not result in a meaningful mass penalty, while still being high enough to allow for self-pressurizing. ...

Reference:

Testing of the N2O/HDPE Vortex Flow Pancake Hybrid Rocket Engine with Augmented Spark Igniter

... At lower temperatures, N 2 O has high oxidative selectivity for methane, producing methanol and formaldehyde with molybdenum and vanadium catalysts [93]. In rocket engines, N 2 O is used as a propellant fuel oxidiser in monopropellant thrusters or in combination with other fuels including propane [94] increasing the fuel combustion rate. ...

Reference:

Recovery and reuse of nitrous oxide from wastewater treatment plants – A step towards carbon neutrality