Abstract
Catalytic oxidation is used to control carbon monoxide (CO) emissions from industrial exhaust. In this work, The prepared Pt(a)-Fe(OH) (x) catalysts (x represents the mass fraction of Pt loading (%), a = 0.5, 1 and 2) by the one-pot reduction method exhibited excellent CO catalytic activity, with the Pt(2)-Fe(OH) (x) catalyst, 70% and ∼100% CO conversion was achieved at 30°C and 60°C, respectively. In addition, the Pt(2)-Fe(OH) (x) catalyst also showed excellent H(2)O resistance and hydrothermal stability in comparison to the Pt(2)/Fe(OH) (x) catalyst prepared by impregnation method. Characterization results showed that the excellent catalytic performance of the catalysts was mainly attributed to the abundant surface oxygen species and Pt(0) the presence of H(2)O, which promoted the catalytic reaction of CO, and Density functional theory (DFT) calculation showed that this was mainly attributed to the catalytic activity of the hydroxyl (-OH) species on Pt(2)-Fe(OH) (x) surface, which could easily oxidize CO to -COOH, which could be further decomposed into CO(2) and H atoms. This study provides valuable insights into the design of high-efficiency non-precious metal catalysts for CO catalytic oxidation catalysts with high efficiency.