High and stable catalytic activity of Ag/Fe 2 O 3 catalysts derived from MOFs for CO oxidation

Zhang, Xiaodong; Yang, Yang; Song, Liang; Wang, Yuxin; He, Chi; Wang, Zhong; Cui, Lifeng

doi:10.1016/j.mcat.2018.01.007

Cited by 148 publications

(31 citation statements)

References 78 publications

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“…Moreover, the amount sequence of the oxygen vacancies over Fe/W-CeO 2 was consistent with the similar trend of pure CeO 2 . Consequently, Fe or W insertion into the CeO 2 lattice might induce the increase in defect concentration in the nanostructure ceria [32]. Raman spectra of (a) CeO2, (b) Fe/W-CeO2 ordinary, nanopolyhedra, nanorods, nanocubes, and (c) the corresponding peak intensity ratios I600/I460.…”

Section: Ramanmentioning

confidence: 99%

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: Ramanmentioning

confidence: 99%

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 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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“…27 For many carbon materials, they not only possess higher ORR activity (eg, heteroatoms-doped fullerene mentioned above) but also have excellent catalytic activity for CO oxidation, such as heteroatoms-doped graphene. 28,29 Besides, some kinds of CO oxidation catalysts such as metal-based material [30][31][32][33][34] and amorphous metal-organic frameworks (MOFs) 35 have been studied in detail. The current paper mainly focuses on the ORR and CO oxidation reaction catalyzed by metal-fullerene C 58 M (M = Mn, Ni, Co, Fe, and Cu).…”

Section: Introductionmentioning

confidence: 99%

Exploring the catalytic activity of metal‐fullerene C ₅₈ M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

Chen

Chang

et al. 2019

Int J Energy Res

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Summary In the present work, the catalytic activity of metal‐fullerene C58M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction reaction (ORR) and CO oxidation has been explored by detailed density functional theory calculations. Firstly, the binding energy of various ORR species (OOH, O, and OH) on C58M and the corresponding adsorption structures are calculated. The results show that the adsorption strength of any ORR species on C58M follows the order of C58Mn > C58Fe > C58Co > C58Ni > C58Cu and C58Co shows the closest binding energy compared with the Pt(111) surface. Further analysis of the free energy change of ORR indicates that C58Co, C58Ni, and C58Fe have different degrees of catalytic activities, with the calculated free energy change of rate‐determining step of −0.70, −0.32, and −0.04 eV, respectively. On the basis of the above results, the C58Co obviously has the highest ORR activity, with a relatively small overpotential of 0.53 V. In addition, the adsorption free energy of OH can be used as a good descriptor for ORR activity due to the nearly linear relationships between ∆G*OOH, ∆G*O, and ∆G*OH. At last, the catalytic property of C58Co toward CO oxidation reaction is also explored. The calculated results show that CO oxidation on C58Co follows LH mechanism and the rate‐determining step is recognized as *CO + *O2 → *OOCO, with the energy change of −0.13 eV.

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High and stable catalytic activity of Ag/Fe 2 O 3 catalysts derived from MOFs for CO oxidation

Cited by 148 publications

References 78 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

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

Exploring the catalytic activity of metal‐fullerene C ₅₈ M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

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High and stable catalytic activity of Ag/Fe 2 O 3 catalysts derived from MOFs for CO oxidation

Cited by 148 publications

References 78 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

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

Exploring the catalytic activity of metal‐fullerene C 58 M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

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Exploring the catalytic activity of metal‐fullerene C ₅₈ M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory