The mechanism of highly selective PROX reaction of CO deduced from the dynamics of intermediates: Oxidation of CO via HCOO with OH

摘要

Introduction Oxidation of CO on our developed FeOx/Pt/TiO2 catalyst was markedly enhanced by H2O, and the enhancement by H2O and D2O showed an isotope effect. The selective oxidation of CO enhanced by H2O is difficult to explain by the traditional competitive reaction mechanism of CO (a) and H(a) with O(a). The dynamics of the intermediates studied by in-situ DRIFT-IR spectroscopy proved that the oxidation of CO occurs via HCOO intermediate with OH, which is responsible for the highly selective low temperature preferential oxidation (PROX) reaction of CO on the FeOx/Pt/TiO2 catalyst.