Selective Ru Adsorption on SnO<sub>2</sub>/CeO<sub>2</sub> Mixed Oxides for Efficient Destruction of Multicomponent Volatile Organic Compounds: From Laboratory to Practical Possibility

As typical air pollutants, CO, CH4, and volatile organic compounds (VOCs) have received great attention due to their negative impact on the environment and human health. Heterogeneous catalysts are widely used in the catalytic removal of exhaust emission from industrial and automobile sources but still suffer from deactivation because of various factors. The development of a catalyst with excellent catalytic stability is highly desired. We herein summarized the recent progress for enhancing the catalytic stability of catalysts and tried to obtain an in-depth understanding of the long-term durability, resistance to sinter, and tolerance for multi-impurities. Finally, the current challenges and future perspectives for developing stable and highly efficient catalysts in the fields of synergistic catalytic removal of pollutants or resource utilization of VOCs via the selective catalytic oxidation are proposed.

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Section: Long-term Durabilitymentioning

confidence: 99%

“…The different metal–support interaction could cause the changed function . In the synthesis process, the pH value was adjusted for the selective adsorption of Ru on the SnO 2 or CeO 2 support to tune the oxidation and dechlorination centers.…”

Section: Long-term Durabilitymentioning

confidence: 99%

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH₄, and Volatile Organic Compounds

et al. 2023

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“…Ceria-based catalysts are widely used in the catalytic degradation of various gaseous pollutants due to their excellent redox ability and oxygen storage capacity. 14 Numerous studies revolve around Ce-based oxides, such as pure CeO 2 , 15 nano CeO 2 with special morphologies, 16 supported CeO 2 (Pt 3 Sn/ CeO 2 and Ru/CeO 2 ), 17,18 and CeO 2 -based composite oxides (CeO 2 @Co 3 O 4 and CuO-CeO 2 ). 19,20 However, pure CeO 2 suffers from poor stability because of the easy sintering at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Ceria-based catalysts are widely used in the catalytic degradation of various gaseous pollutants due to their excellent redox ability and oxygen storage capacity . Numerous studies revolve around Ce-based oxides, such as pure CeO 2 , nano CeO 2 with special morphologies, supported CeO 2 (Pt 3 Sn/CeO 2 and Ru/CeO 2 ), , and CeO 2 -based composite oxides (CeO 2 @Co 3 O 4 and CuO-CeO 2 ). , However, pure CeO 2 suffers from poor stability because of the easy sintering at high temperatures . Therefore, the solid solution fabricated from Ce and other transition metals such as Ti and Zr as well as thermostability is featured, which is promising to solve this issue if their inferior activity could be improved.…”

Section: Introductionmentioning

confidence: 99%

Expediting Toluene Combustion by Harmonizing the Ce–O Strength over Co-Doped CeZr Oxide Catalysts

Shen

Deng

et al. 2023

Environ. Sci. Technol.

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Low-temperature catalytic degradation of volatile organic compounds (VOCs) by enhancing the activity of non-precious metal catalysts has always been the focus of attention. The mineralization of aromatic VOCs requires the participation of a large number of oxygen atoms, so the activation of oxygen species is crucial in the degradation reaction. Herein, we originally adjust the Ce–O bond strength in CeZr oxide catalysts by cobalt doping to promote the activation of oxygen species, thus improving the toluene degradation performance while maintaining high stability. Subsequent characterizations and theoretical calculations demonstrate that the weakening of the Ce–O bond strength increases the oxygen vacancy content, promotes the activation of oxygen species, and enhances the redox ability of the catalysts. This strategy also promotes the activation of toluene and accelerates the depletion of intermediate species. This study will contribute a strategy to enhance the activation ability of oxygen species in non-noble metal oxide catalysts, thereby enhancing the degradation performance of VOCs.

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“…Overall, the total PCDD/Fs yields from the Cu-ZSM-5@Ru/S-1 sample at 350 and 400 °C were below the Chinese national emission standard for PCDD/Fs in municipal solid waste incineration (0.1 ng I-TEQ Nm −3 ). 11 3.4. Structure−Performance Relationship Analyses.…”

Section: Evaluation Of the Pcdd/fs Formationmentioning

confidence: 99%

Rational Design of a Novel Core–Shell Cu-ZSM-5@Ru/S-1 Tandem Catalyst for the Catalytic Combustion of Dichloromethane

et al. 2023

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To achieve a well synergistic effect between dissociative adsorption and deep oxidation during the dichloromethane (DCM) catalytic combustion process, a novel tandem catalyst, Cu-ZSM-5@Ru/S-1, was developed by rationally designing the catalyst structure. Activity experiments revealed that the Cu-ZSM-5@Ru/S-1 catalyst achieved a DCM conversion and mineralization rate of over 90% under a 5% H2O atmosphere at 290 °C with a low Ru loading of 0.2 wt %. The mineralization rate of the Cu-ZSM-5@Ru/S-1 was approximately 78% higher than that of the Cu-ZSM-5 catalyst, and the activity was approximately 55% higher than that of the Ru/HZSM-5 catalyst. Furthermore, the in situ characterizations and simulation results indicated that the DCM catalytic reaction followed a tandem reaction mechanism. The initial dissociative adsorption and conversion of DCM primarily occurred in internal Cu-ZSM-5 active sites, and the deep oxidation of the intermediates was subsequently achieved on the Ru/S-1 shell. The two steps mentioned above acted synergistically to enhance both DCM dechlorination and deep oxidation. In addition, the PCDD/F emission of Cu-ZSM-5@Ru/S-1 catalyst at 350 and 400 °C met the national standard for municipal solid waste incineration (0.1 ng I-TEQ Nm–3). Overall, this study provides new strategies for developing highly active and cost-effective catalysts for CVOC catalytic combustion.

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Selective Ru Adsorption on SnO₂/CeO₂ Mixed Oxides for Efficient Destruction of Multicomponent Volatile Organic Compounds: From Laboratory to Practical Possibility

Cited by 27 publications

References 52 publications

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH₄, and Volatile Organic Compounds

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH₄, and Volatile Organic Compounds

Expediting Toluene Combustion by Harmonizing the Ce–O Strength over Co-Doped CeZr Oxide Catalysts

Rational Design of a Novel Core–Shell Cu-ZSM-5@Ru/S-1 Tandem Catalyst for the Catalytic Combustion of Dichloromethane

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Selective Ru Adsorption on SnO2/CeO2 Mixed Oxides for Efficient Destruction of Multicomponent Volatile Organic Compounds: From Laboratory to Practical Possibility

Cited by 27 publications

References 52 publications

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH4, and Volatile Organic Compounds

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH4, and Volatile Organic Compounds

Expediting Toluene Combustion by Harmonizing the Ce–O Strength over Co-Doped CeZr Oxide Catalysts

Rational Design of a Novel Core–Shell Cu-ZSM-5@Ru/S-1 Tandem Catalyst for the Catalytic Combustion of Dichloromethane

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Product

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Selective Ru Adsorption on SnO₂/CeO₂ Mixed Oxides for Efficient Destruction of Multicomponent Volatile Organic Compounds: From Laboratory to Practical Possibility

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH₄, and Volatile Organic Compounds

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH₄, and Volatile Organic Compounds