Platinum decorated Ru/C: Effects of decorated platinum on catalyst structure and performance for the methanol oxidation reaction

Gao, Haili; Liao, Shijun; Zeng, Jianhuang; Xie, Yichun

doi:10.1016/j.jpowsour.2010.07.040

Cited by 24 publications

(8 citation statements)

References 27 publications

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“…This ratio has been often used to describe the catalyst tolerance of the anodes against the incompletely oxidized species which are accumulated on their surfaces [38,39]. A large ratio means good tolerance of the anode against the poisoning species, i.e., more effective removal of the poisoning species on the electrode surface during the forward potential scan.…”

Section: Methanol Electrooxidationmentioning

confidence: 99%

Electrocatalytic oxidation of methanol at tantalum oxide-modified Pt electrodes

Masud

Alam

Awaludin

et al. 2012

Journal of Power Sources

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Section: Methanol Electrooxidationmentioning

confidence: 99%

Electrocatalytic oxidation of methanol at tantalum oxide-modified Pt electrodes

Masud

Alam

Awaludin

et al. 2012

Journal of Power Sources

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“…Extensive hard work to achieve better performance Pt catalysts in FCs has been reported in the literature. Accompanying platinum, other metals such as ruthenium, 12 palladium, 13 and gold-platinum nanocrystals 14 have been used to improve catalyst efficiency. Efficient removal of CO from the Pt electrode is designated as the CO tolerance of the electrode.…”

Section: Introductionmentioning

confidence: 99%

Architecturally designed Pt–MoS₂ and Pt–graphene composites for electrocatalytic methanol oxidation

Patil

Anothumakkool

Sathaye³

et al. 2015

Phys. Chem. Chem. Phys.

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Thin films consisting of platinum nanoparticles (Pt NPs) with uniform size and distribution have been successfully prepared at a liquid-liquid interface. Apart from the usual substrates like glass, Si etc. the films were also deposited on the surfaces of MoS2 thin films and graphene nanosheets (GNS) respectively, by using a layer-by-layer (LbL) deposition technique to form Pt-MoS2 and Pt-GNS composites. The loading concentration of Pt NPs on MoS2 and GNS can be adjusted by selecting the number and sequence of the component layers during LbL deposition. The Pt thin films, Pt-MoS2 and Pt-GNS nanocomposite thin films are characterized using transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). TEM results of the composites show that Pt NPs with sizes in the range of 1 to 3 nm are uniformly dispersed on the MoS2/GNS surface. The catalytic activities of Pt and Pt-composites for the reaction of methanol oxidation are studied using cyclic voltammetry and chronoamperometry. Electrochemical studies reveal that both the Pt-MoS2 and Pt-GNS nanocomposites show excellent electrocatalytic activity towards methanol oxidation. Pt-MoS2 and Pt-GNS nanocomposite electrodes show excellent stability for reuse of the catalyst. A probable mechanism of catalysis has been discussed. We propose that the similar architecture reported here would be promising for the synthesis of high performance catalysts for fuel cells, gas phase reactions, and other applications such as sensors.

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“…Recent experimental and DFT results have demonstrated that Pt monolayers coated on Ru possess substantially enhanced catalytic activities for CO oxidation through a novel pathway of weakly bonded Pt-(OH) ads on the Pt monolayer/Ru nanomaterial originating from compressive strains resulting from the apparent lattice mismatch (2.55%) between Pt and Ru [35,111,132,177,[415][416][417]. And because of these reported performance enhancements, many types of Ru@Pt core-shell-structured electrocatalysts have been synthesized by using different procedures by researchers and have been reported to produce enhanced catalytic activities for MORs [93,95,113,176,305,328,[418][419][420][421][422][423][424]. For example, a Ru@ Pt core-shell catalyst possessing a 3 nm core and a 3~4 atom layer Pt shell was prepared by using the PED (Fig.…”

Section: Ru As Corementioning

confidence: 99%

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Wang

Luo

et al. 2018

Electrochem. Energ. Rev.

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Pt-based catalysts are the most efficient catalysts for low-temperature fuel cells. However, commercialization is impeded by prohibitively high costs and scarcity. One of the most effective strategies to reduce Pt loading is to deposit a monolayer or a few layers of Pt over other metal cores to form core-shell-structured electrocatalysts. In core-shell-structured electrocatalysts, the compositions of the core can be divided into five classes: single-precious metallic cores represented by Pd, Ru, and Au; singlenon-precious metallic cores represented by Cu, Ni, Co, and Fe; alloy cores containing 3d, 4d or 5d metals; and carbide and nitride cores. Of these, researchers have found that carbide and nitride cores can yield tremendous advantages over alloy cores in terms of cost and promotional activities of Pt shells. In addition, desirable shells with reasonable thicknesses and compositions have been recognized to play a dominant role in electrocatalytic performances. And recently, researchers have also found that the catalytic activity of core-shell-structured catalysts is dependent on the binding energy of the adsorbents, which is determined by the d-band center of Pt. The shifting of this d-band center in turn is mainly affected by strain and electronic effects, which can be adjusted by adjusting core compositions and shell thicknesses of catalysts. In the development of these core-shell structures, optimal synthesis methods are of primary concern because they directly determine the practical application potential of the resulting electrocatalysts. And in this article, the principles behind core-shell-structured low-Pt electrocatalysts and the developmental progresses of various synthesis methods along with the traits of each type of core and its effects on Pt shell catalytic activities are discussed. In addition, perspectives on this type of catalyst are discussed and future research directions are proposed.

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Platinum decorated Ru/C: Effects of decorated platinum on catalyst structure and performance for the methanol oxidation reaction

Cited by 24 publications

References 27 publications

Electrocatalytic oxidation of methanol at tantalum oxide-modified Pt electrodes

Electrocatalytic oxidation of methanol at tantalum oxide-modified Pt electrodes

Architecturally designed Pt–MoS₂ and Pt–graphene composites for electrocatalytic methanol oxidation

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

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Platinum decorated Ru/C: Effects of decorated platinum on catalyst structure and performance for the methanol oxidation reaction

Cited by 24 publications

References 27 publications

Electrocatalytic oxidation of methanol at tantalum oxide-modified Pt electrodes

Electrocatalytic oxidation of methanol at tantalum oxide-modified Pt electrodes

Architecturally designed Pt–MoS2 and Pt–graphene composites for electrocatalytic methanol oxidation

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Contact Info

Product

Resources

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Architecturally designed Pt–MoS₂ and Pt–graphene composites for electrocatalytic methanol oxidation