Synthetic Pt-Fe(OH)x catalysts by one-pot method for CO catalytic oxidation.

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 Pt₂-Fe(OH)_x catalyst, 70% and ~100% CO conversion was achieved at 30°C and 60°C, respectively. In addition, the Pt₂-Fe(OH)_x catalyst also showed excellent H₂O resistance and hydrothermal stability in comparison to the Pt₂/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 Pt⁰ the presence of H₂O, 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 Pt₂-Fe(OH)_x surface, which could easily oxidize CO to -COOH, which could be further decomposed into CO₂ 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. [ABSTRACT FROM AUTHOR]