AUTHOR=Luo Yiwei , He Tianyao , Li Guobo , Wu Daishe , Liu Wenming , Zhang Shule , Peng Honggen 

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

JOURNAL=Frontiers in Chemistry

VOLUME=12

YEAR=2024

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2024.1413489

DOI=10.3389/fchem.2024.1413489

ISSN=2296-2646

ABSTRACT=<p>Catalytic oxidation is used to control carbon monoxide (CO) emissions from industrial exhaust. In this work, The prepared Pt<sub>a</sub>-Fe(OH)<sub><italic>x</italic></sub> catalysts (<italic>x</italic> 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<sub>2</sub>-Fe(OH)<sub><italic>x</italic></sub> catalyst, 70% and ∼100% CO conversion was achieved at 30°C and 60°C, respectively. In addition, the Pt<sub>2</sub>-Fe(OH)<sub><italic>x</italic></sub> catalyst also showed excellent H<sub>2</sub>O resistance and hydrothermal stability in comparison to the Pt<sub>2</sub>/Fe(OH)<sub><italic>x</italic></sub> 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<sup>0</sup> the presence of H<sub>2</sub>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<sub>2</sub>-Fe(OH)<sub><italic>x</italic></sub> surface, which could easily oxidize CO to -COOH, which could be further decomposed into CO<sub>2</sub> 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.</p>