Effects of Preparation Method on the Structure and Catalytic Activity of Ag–Fe2O3 Catalysts Derived from MOFs

Zhang, Xiaodong; Yang, Yang; Lv, Xutian; Wang, Yuxin; Cui, Lifeng

doi:10.3390/catal7120382

Cited by 48 publications

(12 citation statements)

References 59 publications

(88 reference statements)

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“…This peak can be related to the degree of dispersion of metal. The stronger intensity absorption band of Fe2O3 was detected, suggesting that iron was in highly dispersive state, no large iron oxide particles aggregated in the sample [43,44]. It was noted that the Fe/W-CeO2-P catalyst showed the weakest intensity peak of Fe2O3, suggesting the highest dispersion of iron in Fe/W-CeO2-P catalyst.…”

Section: Xpsmentioning

confidence: 94%

Morphology and Crystal-Plane Effects of Fe/W-CeO2 for Selective Catalytic Reduction of NO with NH3

Liu

Wang

et al. 2019

Catalysts

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The CeO2 ordinary amorphous, nanopolyhedrons, nanorods, and nanocubes were prefabricated by the hydrothermal method, and employed as carriers of Fe/W–CeO2 catalysts to selectively catalyze the reduction of NO with ammonia. Characterization results indicated that the morphology of CeO2 support originated from selectively exposing different crystal surfaces, which has a significant effect on oxygen vacancies, acid sites and the dispersion of Fe2O3. The CeO2 nanopolyhedrons catalyst (Fe/W–CeO2–P) showed most oxygen vacancies, the largest the quantity of acid sites, the largest BET (Brunauer-Emmett-Teller) surface area and the best dispersion of Fe2O3, which was associated with predominately exposing CeO2 (111) planes. Consequently, the Fe/W–CeO2–P catalyst has the highest NO conversion rate in the temperature range of 100–325 °C among the ordinary amorphous, nanorods, and nanocubes Fe/W–CeO2 catalysts.

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Section: Xpsmentioning

confidence: 94%

Morphology and Crystal-Plane Effects of Fe/W-CeO2 for Selective Catalytic Reduction of NO with NH3

Liu

Wang

et al. 2019

Catalysts

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“…nitro-compounds hydrogenations,244,263,276,280,281,285,[304][305][306][307] alcohols oxidations,247,293,297 CO oxidation250,259,[264][265][266][267][268][277][278][279]289,[294][295][296]301,246,254,285,[290][291][292]309,310 Ox, achieved by the direct calcination of a bimetallic Ce(Cu)-MOF at 600 °C for 3 h. The catalytic activity was tested using a continuous flow fixed-bed micro-reactor at atmospheric pressure with a CO/O2/N2 mixture in a volume ratio of 1:10:89. The authors found the CeO2-CuO exhibited a high catalytic activity in comparison to that of Ce-Cu-Ox; an almost 80% CO conversion for CeO2-CuO at 250 °C and only 22% for Ce-Cu-Ox derived from the Ce(Cu)-MOF.…”

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confidence: 99%

Metal–Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends, and Future Perspectives

et al. 2020

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More than 95% (in volume) of all today's chemical products are manufactured through catalytic processes, making research into more efficient catalytic materials a thrilling and very dynamic research field. In this regard, Metal Organic Frameworks (MOFs) offer great opportunities for the rational design of new catalytic solids, as highlighted by the unprecedented number of publications appearing over the last decade. In this review, the recent advances in the application of MOFs in heterogeneous catalysis are discussed. MOFs with intrinsic thermo-catalytic activity, as hosts for the incorporation of metal nanoparticles, as precursors for the manufacture of composite catalysts and those active in photo and electrocatalytic processes are critically reviewed. The review is wrapped up with our personal view on future research directions.

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“…The binding energy peaks of Fe 2p 3/2 and Fe 2p 1/2 were found around 711.10 to 710.69 eV and 724.91 to 723.87 eV, respectively, as shown in Figure A, and the carrier was thus composed of Fe 2+ and Fe 3+. As analyzed by fitting the curves obtained from the XPS spectra, the integral area ratios of Fe 2+ and Fe 3+ around the Fe 2p 3/2 peak were close to 1:1 for Pt/FeHAP‐CB3, Pt/FeHAP‐CB2 and Pt/FeHAP‐CB1.…”

Section: Resultsmentioning

confidence: 98%

Preparation and characterization of Pt nanoparticles supported on a Fe‐doped hydroxyapatite‐activated Vulcan XC72 composite material

et al. 2020

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Summary In this research, the hydroxyapatite (HAp) could be directly deposited on carbon black (CB), which was the modified surface to generate more OH− free radicals to strengthen the bond between HAp and CB, before adding ((NH4)2Fe(SO4)2·6H2O) to engage the ion exchange with Fe2+ and Ca2+ to obtain FeHAp‐CB composites. The Pt nanoparticles were then reduced on the FeHAp‐CB composite surface to derive a Pt/FeHAp‐CB catalyst of dual function. The catalyst revealed a steep desorption peak at −0.180 V (vs Ag/AgCl) in a hydrogen oxidation reaction ascribed to the characteristics of Pt (110) facet and the CO detoxication function in the methanol oxidation reaction. The superior performance of Pt/FeHAp‐CB/CB catalyst was apparently related to the Pt (110) surface, the Fe concentration, and the homogeneous dispersion of Pt particles on the FeHAp‐CB composites. And, the ratio of coexisting Pt0 and Pt2+ within Pt/FeHAp‐CB/CB catalyst would definitely affect chemical stability and mass activity. By X‐ray photoelectron spectroscopy (XPS), it was found that a high quantity of Pt0 could improve mass activity, while a high quantity of Pt2+ contributed to chemical stability.

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Effects of Preparation Method on the Structure and Catalytic Activity of Ag–Fe2O3 Catalysts Derived from MOFs

Cited by 48 publications

References 59 publications

Morphology and Crystal-Plane Effects of Fe/W-CeO2 for Selective Catalytic Reduction of NO with NH3

Morphology and Crystal-Plane Effects of Fe/W-CeO2 for Selective Catalytic Reduction of NO with NH3

Metal–Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends, and Future Perspectives

Preparation and characterization of Pt nanoparticles supported on a Fe‐doped hydroxyapatite‐activated Vulcan XC72 composite material

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