Interface effect of mixed phase Pt/ZrO<sub>2</sub> catalysts for HCHO oxidation at ambient temperature

Yang, Xueqin; Yu, Xiaolin; Lin, Min; Ge, Maofa; Zhao, Yao; Wang, Fuyi

doi:10.1039/c7ta03888g

Cited by 135 publications

(51 citation statements)

References 52 publications

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“…Generally, the supported noble metal catalysts exhibit higher catalytic activities in HCHO oxidation at room temperature than metal oxide catalysts. And the supported Pt catalyst is the most active catalyst for HCHO oxidation at room temperature and attracts much attention . However, the high cost and limited resources hinder the application of supported noble metal catalysts .…”

Section: Introductionmentioning

confidence: 99%

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

2019

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Thermal catalytic oxidation is a promising and effective technique for the removal of harmful formaldehyde (HCHO) in indoor air. Manganese oxide is a mostly‐investigated non‐noble metal oxide catalyst and attracts much attention due to its better catalytic performance for formaldehyde oxidation at low temperature. In this review, the effect of manganese oxide crystal structure, surface morphology and microstructure, surface active oxygen species, reducibility as well as catalytic reaction conditions (temperature, relative humidity and HCHO initial concentration) on catalytic performance, and the catalytic mechanism over manganese oxide were summarized and discussed. The challenges and prospects for future development of manganese oxide in catalytic oxidation of formaldehyde are also covered.

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Section: Introductionmentioning

confidence: 99%

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

2019

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“…[8][9] Generally, noble metal oxide catalysts exhibit high catalytic activity at low temperatures for deep oxidation of VOCs. [10][11][12][13][14][15] However, their practical applications are greatly limited due to their high cost, easy sintering and poisoning nature. Compared with precious metal oxides, various active transition metal oxides (Co 3 O 4 , Mn 3 O 4 , CeO 2 , Fe 2 O 3 , NiO, TiO 2 , etc.)…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Yang

et al. 2019

ChemCatChem

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A double‐sided nanobrush Co3O4 (Co3O4−B) catalyst was successfully prepared by a hydrothermal method for the first time, and Co3O4 rods (Co3O4−R), Co3O4 hexagonal plates (Co3O4−H) and Co3O4 double‐sided helianthus discs (Co3O4−D) were also synthesized through tuning the water/ethanol ratio. Among all of the as‐prepared catalysts, the Co3O4−B catalyst exhibited the best catalytic activity for benzene oxidation. The excellent catalytic performance could be attributed to the surface abundance Co3+ species, good low‐temperature reducibility and high number of lattice defects with substantial active oxygen species, which resulted from the unique structure of the double‐sided nanobrush. The stability and water tolerance tests demonstrated that the Co3O4−B catalyst displays excellent stability for benzene combustion, and the deactivation caused by water vapor is also reversible. It is concluded that the unique structure of the catalysts plays a crucial role in determining its catalytic oxidation performance.

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“…[37][38][39][40] All the Pt/ZrO 2 catalysts display Pt 4f 5/2 peaks centered at 73.3, 75.1, and 78.3 eV (see Figure S3 c), which correspond to metallic Pt 0 and the ionic species Pt 2 + and Pt 4 + ,r espectively. [36,40,41] Thus, the XPS data confirm the existence of mixed-valence states of platinum. As showni nF igure S3 b, two typical peaks can clearly be observedi nt he O1 sX PS spectra of the Pt/ZrO 2 catalysts.…”

Section: Resultsmentioning

confidence: 55%

“…The positions of the diffraction peaks of ZrO 2 in each of the catalysts are the same as those of the standard card of ZrO 2 (space group Fm3 À m,P DF2 entry 49-1642), which exhibits ac ubic structurew ith three peaks at 2q = 30.12, 50.22,a nd 59.748,a ttributed to the (111), (220), and (311) planes, respectively. [35,36] Thus, the diffraction patterns of thec atalysts belong to the cubic zirconia structure. However,a tt he calcination temperature, zirconia typically forms am onoclinic or tetragonal structure rather than ac ubic structure.…”

Section: Resultsmentioning

confidence: 99%

Platinum‐Supported Zirconia Nanotube Arrays Supported on Graphene Aerogels Modified with Metal–Organic Frameworks: Adsorption and Oxidation of Formaldehyde at Room Temperature

Tan

Chen

et al. 2019

Chemistry A European J

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Precious-metal catalysts (e.g.,A u, Rh, Ag, Ru, Pt, and Pd)s upported on transition-metal oxides (e.g.,A l 2 O 3 , Fe 2 O 3 ,CeO 2 ,ZrO 2 ,Co 3 O 4 ,MnO 2 ,T iO 2 ,and NiO) can effectively oxidize volatile organic compounds. In this study,p orous platinum-supported zirconia materials have been prepared by a" surface-casting" method.T he synthesized catalysts presenta no rdered nanotube structure and exhibited excellent performance toward the catalytic oxidation of formaldehyde. Af acile method, utilizing ab oilingw ater bath, was used to fabricate graphene aerogel (GA), and the macroscopic 3D Pt/ZrO 2 -GA was modified by introducing an adjustable MOF coating by as urfaces tep-by-stepm ethod.T he unblocked mesoporous structure of the graphene aerogel facilitates the ingress and egress of reactants and product molecules. The selected 7wt.% Pt/ZrO 2 -GA-MOF-5 composite demonstrated excellent performance for HCHO adsorption. Additionally,t his catalysta chieved around 90 %c onversion when subjectedto ar eaction temperature of 70 8C (T 90 % = 70 8C). The Pt/ZrO 2 -GA-MOF-5c omposite induces a catalytic cycle, increasing the conversion by simultaneously adsorbing and oxidizing HCHO. Thisw ork providesasimple approacht oi ncreasing reactantc oncentration on the catalyst to increase the rate of reaction.

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Interface effect of mixed phase Pt/ZrO₂ catalysts for HCHO oxidation at ambient temperature

Abstract: High-efficiency Pt/ZrO2 catalysts with a mixed phase were successfully prepared. The catalysts exhibited high activity and their interfacial structure can change the reaction pathway.

Cited by 135 publications

References 52 publications

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Platinum‐Supported Zirconia Nanotube Arrays Supported on Graphene Aerogels Modified with Metal–Organic Frameworks: Adsorption and Oxidation of Formaldehyde at Room Temperature

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Interface effect of mixed phase Pt/ZrO2 catalysts for HCHO oxidation at ambient temperature

Abstract: High-efficiency Pt/ZrO2 catalysts with a mixed phase were successfully prepared. The catalysts exhibited high activity and their interfacial structure can change the reaction pathway.

Cited by 135 publications

References 52 publications

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co3O4 Catalyst and Its Catalytic Performance for Benzene Oxidation

Platinum‐Supported Zirconia Nanotube Arrays Supported on Graphene Aerogels Modified with Metal–Organic Frameworks: Adsorption and Oxidation of Formaldehyde at Room Temperature

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Interface effect of mixed phase Pt/ZrO₂ catalysts for HCHO oxidation at ambient temperature

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation