Citation: Hongling Guan, Yang Chen, Chongyan Ruan, Jian Lin, Yang Su, Xiaodong Wang, Lingbo Qu. Versatile application of wet-oxidation for ambient CO abatement over Fe(OH)_x supported subnanometer platinum group metal catalysts[J]. Chinese Journal of Catalysis, ;2020, 41(4): 613-621. doi: S1872-2067(19)63489-3 shu

Versatile application of wet-oxidation for ambient CO abatement over Fe(OH)_x supported subnanometer platinum group metal catalysts

a School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China;
b CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
c College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China

Received Date: 30 August 2019
Revised Date: 27 September 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (21576251, 21676269, 21808212, 21878283), the Youth Innovation Promotion Association CAS (2017223), National Key Projects for Fundamental Research and Development of China (2016YFA0202801), the "Strategic Priority Research Program" of the Chinese Academy of Sciences (XDB17020100), China Postdoctoral Science Foundation (2019M652578), the Postdoctoral Sponsorship in Henan Province (1902015), Science and Technology Program of Henan Province (192102210034), and Zhongyuan Postdoctoral Program for Innovation Talents.

The efficient and stable abatement of CO pollutant under ambient conditions is of great significance; however, it remains a formidable challenge. Herein, we report the versatile application of wet oxidation over Fe(OH)_x supported subnanometer Pt group metal (PGM) catalysts for the complete removal of CO under ambient temperature and humidity conditions. Typically, the 1.8 wt% Rh/Fe(OH)_x catalyst exhibited better durability during a~1400 min run for wet oxidation than for dry CO oxidation. Multiple characterization results including HR-TEM, H₂-TPR, and in-situ DRIFTS suggested that Fe(OH)_x, with good reducibility, promoted by the subnanometer Rh clusters, provided sites for the adsorption and reaction of O₂ and H₂O to form OH species. Subsequently, these OH species reacted with the adsorbed CO on Rh sites with a considerably lower activation energy (9 kJ mol^-1) than that of dissociated O species (22 kJ mol^-1), thus rationalizing the outstanding performance of Rh/Fe(OH)_x for wet oxidation. Extended experiments with other PGMs revealed a good generality for the application of wet oxidation in the efficient abatement of CO under humid conditions with Fe(OH)_x as the support.
- Platinum group metals,
- CO,
- Oxidation,
- Ambient condition,
- Fe(OH)_x,
- Subnanometer clusters
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Versatile application of wet-oxidation for ambient CO abatement over Fe(OH)x supported subnanometer platinum group metal catalysts

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通讯作者: 陈斌, bchen63@163.com

Versatile application of wet-oxidation for ambient CO abatement over Fe(OH)_x supported subnanometer platinum group metal catalysts