Critical Review of Low-Temperature CO Oxidation and Hysteresis Phenomenon on Heterogeneous Catalysts

There is a growing demand for new heterogeneous catalysts for cost-effective catalysis. Currently, the hysteresis phenomenon during low-temperature CO oxidation is an important topic in heterogeneous catalysis. Hysteresis provides important information about fluctuating reaction conditions that affect the regeneration of active sites and indicate the restoration of catalyst activity. Understanding its dynamic behavior, such as hysteresis and self-sustained kinetic oscillations, during CO oxidation, is crucial for the development of cost-effective, stable and long-lasting catalysts. Hysteresis during CO oxidation has a direct influence on many industrial processes and its understanding can be beneficial to a broad range of applications, including long-life CO2 lasers, gas masks, catalytic converters, sensors, indoor air quality, etc. This review considers the most recent reported advancements in the field of hysteresis behavior during CO oxidation which shed light on the origin of this phenomenon and the parameters that influence the type, shape, and width of the conversion of the hysteresis curves.

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Dynamic active sites over binary oxide catalysts: In situ/operando spectroscopic study of low-temperature CO oxidation over MnOx-CeO2 catalysts

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2016.03.030 ◽

2016 ◽

Vol 191 ◽

pp. 179-191 ◽

Cited By ~ 74

Author(s):

Xiao-man Zhang ◽

Ya-Qing Deng ◽

Pengfei Tian ◽

Huan-huan Shang ◽

Jing Xu ◽

...

Keyword(s):

Low Temperature ◽

Spectroscopic Study ◽

Co Oxidation ◽

Active Sites ◽

Binary Oxide ◽

Oxide Catalysts ◽

Low Temperature Co Oxidation

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Low-temperature CO oxidation on Ag/ZSM-5 catalysts: Influence of Si/Al ratio and redox pretreatments on formation of silver active sites

Fuel ◽

10.1016/j.fuel.2016.10.037 ◽

2017 ◽

Vol 188 ◽

pp. 121-131 ◽

Cited By ~ 33

Author(s):

E. Kolobova ◽

A. Pestryakov ◽

G. Mamontov ◽

Yu. Kotolevich ◽

N. Bogdanchikova ◽

...

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Low Temperature Co Oxidation

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Elucidation of the Active Sites in Single-Atom Pd1/CeO2 Catalysts for Low-Temperature CO Oxidation

ACS Catalysis ◽

10.1021/acscatal.0c02480 ◽

2020 ◽

Vol 10 (19) ◽

pp. 11356-11364 ◽

Cited By ~ 1

Author(s):

Dong Jiang ◽

Gang Wan ◽

Carlos E. García-Vargas ◽

Linze Li ◽

Xavier Isidro Pereira-Hernández ◽

...

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Single Atom ◽

Low Temperature Co Oxidation

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Activation of surface lattice oxygen in single-atom Pt/CeO2 for low-temperature CO oxidation

Science ◽

10.1126/science.aao2109 ◽

2017 ◽

Vol 358 (6369) ◽

pp. 1419-1423 ◽

Cited By ~ 458

Author(s):

Lei Nie ◽

Donghai Mei ◽

Haifeng Xiong ◽

Bo Peng ◽

Zhibo Ren ◽

...

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Fuel Efficiency ◽

Steam Treatment ◽

Single Atom ◽

Oxidation Activity ◽

Formidable Challenge ◽

Low Temperature Co Oxidation ◽

Exhaust Treatment

To improve fuel efficiency, advanced combustion engines are being designed to minimize the amount of heat wasted in the exhaust. Hence, future generations of catalysts must perform at temperatures that are 100°C lower than current exhaust-treatment catalysts. Achieving low-temperature activity, while surviving the harsh conditions encountered at high engine loads, remains a formidable challenge. In this study, we demonstrate how atomically dispersed ionic platinum (Pt2+) on ceria (CeO2), which is already thermally stable, can be activated via steam treatment (at 750°C) to simultaneously achieve the goals of low-temperature carbon monoxide (CO) oxidation activity while providing outstanding hydrothermal stability. A new type of active site is created on CeO2 in the vicinity of Pt2+, which provides the improved reactivity. These active sites are stable up to 800°C in oxidizing environments.

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Atomically Dispersed Pd–O Species on CeO2(111) as Highly Active Sites for Low-Temperature CO Oxidation

ACS Catalysis ◽

10.1021/acscatal.7b02001 ◽

2017 ◽

Vol 7 (10) ◽

pp. 6887-6891 ◽

Cited By ~ 81

Author(s):

Giulia Spezzati ◽

Yaqiong Su ◽

Jan P. Hofmann ◽

Angelica D. Benavidez ◽

Andrew T. DeLaRiva ◽

...

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Highly Active ◽

Low Temperature Co Oxidation

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Unraveling the nature of active sites onto copper/ceria-zirconia catalysts for low temperature CO oxidation

Catalysis Today ◽

10.1016/j.cattod.2021.03.026 ◽

2021 ◽

Author(s):

J.C. Martínez-Munuera ◽

V.M. Serrano-Martínez ◽

J. Giménez-Mañogil ◽

M.P. Yeste ◽

A. García-García

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Low Temperature Co Oxidation

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Promoting effects of ceria on the catalytic performance of gold supported on TiO2 for low-temperature CO oxidation

RSC Advances ◽

10.1039/c3ra47226d ◽

2014 ◽

Vol 4 (33) ◽

pp. 16985-16991 ◽

Cited By ~ 9

Author(s):

Jun Yu ◽

Guisheng Wu ◽

Guanzhong Lu ◽

Dongsen Mao ◽

Yun Guo

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

High Stability ◽

Oxygen Vacancies ◽

Catalytic Performance ◽

Quick Recovery ◽

Low Temperature Co Oxidation

Doping with Ce enhanced the Au–support synergy and modified the active sites. The effortless decomposition of carbonates and quick recovery of oxygen vacancies on the Au/CeO2–TiO2 surface may be responsible for its high stability.

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Identification of the Active Sites for Low Temperature CO Oxidation over Nanocrystalline Co3O4Catalysts

Journal of the Chinese Chemical Society ◽

10.1002/jccs.201300341 ◽

2014 ◽

Vol 61 (4) ◽

pp. 490-494 ◽

Cited By ~ 7

Author(s):

Chang-Xiang Liu ◽

Qian Liu ◽

Xi-Gen Huang ◽

Xu-Liang Nie ◽

Zhong Huang

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Low Temperature Co Oxidation

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The Origin of Au/Ce1-xZrxO2 Catalyst’s Active Sites in Low-Temperature CO Oxidation

Catalysts ◽

10.3390/catal10111312 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1312

Author(s):

Izabela Dobrosz-Gómez ◽

Miguel-Ángel Gómez-García ◽

Jacek Michał Rynkowski

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Active Sites ◽

Surface Composition ◽

Co Adsorption ◽

Gold Catalysis ◽

Support Surface ◽

Oxide Support ◽

Low Temperature Co Oxidation

Gold catalysts have found applications in many reactions of both industrial and environmental importance. Great interest has been paid to the development of new processes that reduce energy consumption and minimize pollution. Among these reactions, the catalytic oxidation of carbon monoxide (CO) is an important one, considering that a high concentration of CO in the atmosphere creates serious health and environmental problems. This paper examines the most important achievements and conclusions arising from the own authorship contributions concerning (2 wt. % Au)/Ce1−xZrxO2 catalyst’s active sites in low-temperature CO oxidation. The main findings of the present review are: (1) The effect of preparing conditions on Au crystallite size, highlighting some of the fundamental underpinnings of gold catalysis: the Au surface composition and the poisoning effect of residual chloride on the catalytic activity of (2 wt. % Au)/Ce1−xZrxO2 catalysts in CO oxidation; (2) The identification of ion clusters related to gold and their effect on catalyst’ surface composition; (3) The importance of physicochemical properties of oxide support (e.g., its particle size, oxygen mobility at low temperature and redox properties) in the creation of catalytic performance of Au catalysts; (4) The importance of oxygen vacancies, on the support surface, as the centers for oxygen molecule activation in CO reaction; (5) The role of moisture (200–1000 ppm) in the generation of enhanced CO conversion; (6) The Au-assisted Mars-van Krevelen (MvK) adsorption–reaction model was pertinent to describe CO oxidation mechanism. The principal role of Au in CO oxidation over (2 wt. % Au)/Ce1−xZrxO2 catalysts was related to the promotion in the transformation process of reversibly adsorbed or inactive surface oxygen into irreversibly adsorbed active species; (7) Combination of metallic gold (Au0) and Au-OH species was proposed as active sites for CO adsorption. These findings can help in the optimization of Au-containing catalysts.

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