Electrochemical deposition of Au–Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation

Ye, Weichun; Kou, Huanhuan; Liu, Qinze; Yan, Junfeng; Zhou, Feng; Wang, Chunming

doi:10.1016/j.ijhydene.2011.11.132

Cited by 104 publications

(37 citation statements)

References 43 publications

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“…Fig Au. This is probably due to the electron transfer occurs from Pt to Au, which is consistent with the electronegativity series (electronegativity: Pt = 2.28, Au = 2.54) [52]. Thus, XPS data further support that the as-prepared bimetallic PtAu have formed an alloy.…”

Section: Resultssupporting

confidence: 80%

Facile synthesis of PtAu nanoparticles supported on polydopamine reduced and modified graphene oxide as a highly active catalyst for methanol oxidation

Ren

Zhai

Zhu

et al. 2015

Electrochimica Acta

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Section: Resultssupporting

confidence: 80%

Facile synthesis of PtAu nanoparticles supported on polydopamine reduced and modified graphene oxide as a highly active catalyst for methanol oxidation

Ren

Zhai

Zhu

et al. 2015

Electrochimica Acta

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“…The difference of about 0.6 eV between the binding energies of Au 0 and Au 1+ supports the presence of the oxidation state Au 1+ [25]. Additionally, Au 0 exhibited a theoretical intensity ratio of I(Au 4f 7/2 ):I(Au 4f 5/2 ) = 4:3 [26], which was used as one of the constraints in the fitting of the XPS data. However, the Au 1+ peak might also have been caused by very small (<1.5 nm) Au particles on the surface [25,27,28].…”

Section: Compoundmentioning

confidence: 82%

Catalytic Oxidation of Dimethyl Disulfide over Bimetallic Cu–Au and Pt–Au Catalysts Supported on γ-Al2O3, CeO2, and CeO2–Al2O3

et al. 2019

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Dimethyl disulfide (DMDS, CH 3 SSCH 3 ) is an odorous and harmful air pollutant (volatile organic compound (VOC)) causing nuisance in urban areas. The abatement of DMDS emissions from industrial sources can be realized through catalytic oxidation. However, the development of active and selective catalysts having good resistance toward sulfur poisoning is required. This paper describes an investigation related to improving the performance of Pt and Cu catalysts through the addition of Au to monometallic "parent" catalysts via surface redox reactions. The catalysts were characterized using ICP-OES, N 2 physisorption, XRD, XPS, HR-TEM, H 2 -TPR, NH 3 -TPD, CO 2 -TPD, and temperature-programmed 18 O 2 isotopic exchange. The performance of the catalysts was evaluated in DMDS total oxidation. In addition, the stability of a Pt-Au/Ce-Al catalyst was investigated through 40 h time onstream. Cu-Au catalysts were observed to be more active than corresponding Pt-Au catalysts based on DMDS light-off experiments. However, the reaction led to a higher amount of oxygen-containing byproduct formation, and thus the Pt-Au catalysts were more selective. H 2 -TPR showed that the higher redox capacity of the Cu-containing catalysts may have been the reason for better DMDS conversion and lower selectivity. The lower amount of reactive oxygen on the surface of Pt-containing catalysts was beneficial for total oxidation. The improved selectivity of ceria-containing catalysts after the Au addition may have resulted from the lowered amount of reactive oxygen as well. The Au addition improved the activity of Al 2 O 3 -supported Cu and Pt. The Au addition also had a positive effect on SO 2 production in a higher temperature region. A stability test of 40 h showed that the Pt-Au/Ce-Al catalyst, while otherwise promising, was not stable enough, and further development is still needed.Catalytic treatment is a suitable abatement technology for VOCs, especially when emission streams are complex and when the total VOC concentrations fluctuate. Catalytic oxidation is an environmentally sound destructive method and is highly feasible economically when heat-recovery-allowing processes such as reverse flow reactors (RFRs) are used. Catalytic oxidation of SVOCs is an attractive possibility: However, due to the presence of sulfur, the selectivity and stability of the catalysts need to be improved [2].The use of bimetallic catalysts in the total oxidation of gaseous dimethyl disulfide (DMDS) has not yet been extensively studied. Ojala [5] used Pt-Pd, Mn-Mg, Cu-Cr, and Cu-Mg-Cr catalysts supported on alumina or ceria-alumina in CH 3 SH and CH 3 SSCH 3 oxidation. Kucherov et al. [6,7] studied the removal of CH 3 OH, CH 3 SH, and CH 3 SSCH 3 from flue gases using Au-Rh/HZSM-5 catalysts. The experiments demonstrated high activity and good sulfur resistance at temperatures as low as 290 • C. studied the catalytic oxidation of CH 3 SSCH 3 over Pt-Cu catalysts and reported similarly promising results.Sulfate promotes the mobility of Pt particles on the catalys...

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“…Therefore, the thin coatings are utilized to protect the parts against abrasion, and corrosion occurred in electronic and electric equipment (99,149,150). The main properties and applications of them are summarized in this section.…”

Section: Pt Group Metalsmentioning

confidence: 99%

Fabrication and Properties of Micro- and Nanostructured Coatings Using Electrochemical Depositions

Aliofkhazraei

Ali

2014

Comprehensive Materials Processing

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Electrochemical deposition of Au–Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation

Cited by 104 publications

References 43 publications

Facile synthesis of PtAu nanoparticles supported on polydopamine reduced and modified graphene oxide as a highly active catalyst for methanol oxidation

Facile synthesis of PtAu nanoparticles supported on polydopamine reduced and modified graphene oxide as a highly active catalyst for methanol oxidation

Catalytic Oxidation of Dimethyl Disulfide over Bimetallic Cu–Au and Pt–Au Catalysts Supported on γ-Al2O3, CeO2, and CeO2–Al2O3

Fabrication and Properties of Micro- and Nanostructured Coatings Using Electrochemical Depositions

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