PROX
（重定向自Preferential oxidation）
PROX is an acronym for PReferential OXidation, and refers to the preferential oxidation of a gas on a catalyst.
The catalyst preferentially oxidises carbon monoxide (CO) using a heterogeneous catalyst placed upon a ceramic support. Catalysts include metals such as platinum, platinum/iron, platinum/ruthenium, gold nanoparticles as well as novel copper oxide/ceramic conglomerate catalysts.