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

Authors :
Luo, Yiwei
He, Tianyao
Li, Guobo
Wu, Daishe
Liu, Wenming
Zhang, Shule
Peng, Honggen
Tankov, Ivaylo
Zong, Xupeng
Lu, Jichang
Source :
Frontiers in Chemistry; 2024, p1-10, 10p
Publication Year :
2024

Abstract

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

Details

Language :
English
ISSN :
22962646
Database :
Complementary Index
Journal :
Frontiers in Chemistry
Publication Type :
Academic Journal
Accession number :
178604153
Full Text :
https://doi.org/10.3389/fchem.2024.1413489