One-pot synthesis of reduced graphene oxide supported PtCuy catalysts with enhanced electro-catalytic activity for the methanol oxidation reaction

Peng, Xinglan; Zhao, Yi; Chen, Du-Hong; Fan, Yanfang; Wang, Xiao; Wang, Weili; Tian, Jianniao

doi:10.1016/j.electacta.2014.05.110

Cited by 50 publications

(32 citation statements)

References 83 publications

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“…Thus, in Pt-Cu alloy, electron is transferred from Cu to Pt. Such electron transfer was also identified in XPS study (Peng et al 2014;Wang et al 2011). The Cu in Cu9(EG) was more metallic than Cu9(2-Pr) in good agreement with the XRD results.…”

Section: Effect Of Reduction Enhancerssupporting

confidence: 78%

Effect of reduction enhancer on a radiolytic synthesis of carbon-supported Pt–Cu nanoparticles and their structural and electrochemical properties

et al. 2015

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In order to clarify the effect of reduction enhancer on the nanoparticle formation process and their structural and catalytic properties, carbon-supported Pt-Cu nanoparticles were synthesized by electron beam irradiation on an aqueous precursor solution in the presence/absence of reduction enhancer. In the absence of reduction enhancer, tetravalent platinum oxide particles of approximately 1 nm in diameter were formed on carbon support with copper barely precipitated, while in the presence of 2-propanol or ethylene glycol or glucose both platinum and copper precipitated as few-nanometer-sized alloy particles together with copper oxides. It was suggested that the metal nuclei produced upon electron beam irradiation do not have enough lifetime without reduction enhancer due to fast oxidation of the nuclei by oxidizing radicals, while the reduction enhancer scavenges these oxidizing radicals preventing oxidation of metallic clusters and prolonging their lifetime. Ethylene glycol gave smaller and better alloyed particles with less copper oxides compared to 2-propanol since the carbonyl compounds derived from oxidation of ethylene glycol protect metallic clusters from oxidation further prolonging their lifetime. In the electrochemical measurements, the methanol oxidation activities of Pt-Cu/C catalysts were well explained by their structural characteristics.

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Section: Effect Of Reduction Enhancerssupporting

confidence: 78%

Effect of reduction enhancer on a radiolytic synthesis of carbon-supported Pt–Cu nanoparticles and their structural and electrochemical properties

et al. 2015

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“…Pt metal alloyed with transition metals such as Cu can provide more oxygenated species at lower potentials, which help to limit poisoning of the surface. On the other hand, the combination of Pt with Cu can reduce binding strength of CO on the catalyst by shifting the d‐band of the electronic structure . Both properties serve to enhance the electrochemical activity for the MOR.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the combination of Pt with Cu can reduce binding strength of CO on the catalystb ys hifting the d-band of the electronic structure. [33] Both properties serve to enhancet he electrochemical activity for the MOR. Furthermore,t he durability of the samples was examined at 0.6 Vf or 4000 s ( Figure 5d).…”

Section: Resultsmentioning

confidence: 99%

Mesoporous PtCu Alloy Nanoparticles with Tunable Compositions and Particles Sizes Using Diblock Copolymer Micelle Templates

Kang

Jiang

ALOthman

et al. 2018

Chemistry A European J

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A simple, scalable route for the generation of mesoporous Rh particles by chemical reduction on self‐assembled block‐copolymer micelle templates was reported recently (Nat. Commun. 2017, 8, 15581). Here, this concept is extended to generate mesoporous PtCu alloy nanoparticles through the same approach. The PtCu alloy particles possess high‐surface‐area nanoporous architectures and good chemical stability for applications in catalysis. Both the composition and diameter of the bimetallic PtCu nanoparticles can be controlled by adjusting the amount of precursor in the reaction, which affects the electrochemical properties of the material. The combination of the mesoporous structure with the synergistic bimetallic electronic effects of PtCu gives rise to enhanced activity for the catalytic oxidation of methanol compared with commercial Pt black.

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“…And the other two weaker peaks at 71.95 and 75.00 eV are assigned to Pt 4f 7/2 and Pt 4f 5/2 of Pt 2+ , respectively 49 . The weaker doublet could be assigned to Pt (II) chemical states (PtO and Pt(OH) 2 ) 50 . Their peak intensities presented that Pt 0 is the predominant species, illustrating that the H 2 PtCl 6 precursor was efficiently reduced.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical synthesis of AuPt nanoflowers in deep eutectic solvent at low temperature and their application in organic electro-oxidation

Duan

Liu

et al. 2018

Sci Rep

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Deep eutectic solvents (DESs), called a new generation of green solvents, have broad applied in synthesis of nanomaterials due to their remarkable physicochemical properties. In this work, we used a unique strategy (adding moderate water (10%) to DES) to effectively prepare nanomaterials. Flower-like AuPt alloy nanoparticles were successfully synthesized using one-step electrochemical reduction method at a low potential of −0.30 V (vs. Pt) and a low temperature of 30 °C. In this process, the DES acted as solvent and shape-directing agent. More importantly, we used the electrode modified with the as-prepared nanomaterials as the anode to the electrochemical oxidation synthesis. The glassy carbon electrode modified with the AuPt nanoflowers was directly employed to the electro-oxidation of xanthene (XT) to xanthone (XO) under a constant low potential of 0.80 V (vs. Ag/AgCl) and room temperature, with a high yield of XO. Moreover, the synthesis process was milder and more environment-friendly than conventional organic syntheses. This new strategy would have a promising application in electroorganic synthesis fields.

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One-pot synthesis of reduced graphene oxide supported PtCuy catalysts with enhanced electro-catalytic activity for the methanol oxidation reaction

Cited by 50 publications

References 83 publications

Effect of reduction enhancer on a radiolytic synthesis of carbon-supported Pt–Cu nanoparticles and their structural and electrochemical properties

Effect of reduction enhancer on a radiolytic synthesis of carbon-supported Pt–Cu nanoparticles and their structural and electrochemical properties

Mesoporous PtCu Alloy Nanoparticles with Tunable Compositions and Particles Sizes Using Diblock Copolymer Micelle Templates

Electrochemical synthesis of AuPt nanoflowers in deep eutectic solvent at low temperature and their application in organic electro-oxidation

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