High Performance PtRuIr Catalysts Supported on Carbon Nanotubes for the Anodic Oxidation of Methanol

Liao, Shijun; Holmes, Kerry-Anne; Tsaprailis, Haralampos; Birss, Viola I.

doi:10.1021/ja0578653

Cited by 291 publications

(172 citation statements)

References 15 publications

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“…It is envisaged that such assemblies may form quasi one-dimensional nanoparticle networks that could be used for various applications such as singleelectron transistors, biosensors, and plasmon waveguides or for the formation of novel composite and catalytic materials. [41][42][43][44][45] Supporting Information Available: FT-IR spectrum of BCmodified BNNTs ( Figure S1). TEM image of DMAP-stabilized gold nanoparticles ( Figure S2).…”

Section: Discussionmentioning

confidence: 99%

Self-Assembly of Gold Nanoparticles at the Surface of Amine- and Thiol-Functionalized Boron Nitride Nanotubes

et al. 2007

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Gold nanoparticles have been self-assembled at the surface of both amine-and thiol-functionalized boron nitride nanotubes (BNNTs) in solution. The chemical functionalization of the surface of the BNNTs was achieved following ammonia plasma irradiation in order to generate amine functional groups at the surface of the BNNTs. The amine-functionalized BNNTs (AF-BNNTs) were then covalently modified by the coupling of short-chain thiol-terminated organic molecules to result in thiol-functionalized BNNTs. The functionalization of the BNNTs was characterized using XPS, FT-IR spectroscopy, and EDS, whereas the nanoparticle-nanotube assemblies were characterized using HR-TEM and EELS. This approach constitutes a basis for the preparation of highly functionalized BNNTs and their utilization as nanoscale templates for assembly and integration with other nanoscale materials.

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Section: Discussionmentioning

confidence: 99%

Self-Assembly of Gold Nanoparticles at the Surface of Amine- and Thiol-Functionalized Boron Nitride Nanotubes

et al. 2007

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“…Vidal-Iglesias et al [38] found that Pt 75 Ir 25 NPs showed, in the low potential range, an enhancement of the ammonia oxidation current compared with the pure Pt NPs prepared by the same method. It has also been reported that the addition of Ir significantly improves the performance of the PtRuIr catalyst for methanol oxidation [40]. The ORR kinetic analysis by the rotating disk electrode showed that alloying Pt with Ir, especially with 5-20 wt% Ir, enhanced the catalytic activity for the ORR by a factor of more than 1.5 [43].…”

Section: Introductionmentioning

confidence: 89%

“…Binary or ternary Pt alloy NPs with Ir showed excellent catalytic activities for electro-oxidation of ammonia [34][35][36][37][38], methanol [39][40][41], formic acid [33,42] and ORR [43]. Vidal-Iglesias et al [38] found that Pt 75 Ir 25 NPs showed, in the low potential range, an enhancement of the ammonia oxidation current compared with the pure Pt NPs prepared by the same method.…”

Section: Introductionmentioning

confidence: 99%

Shape-controlled synthesis of Pt-Ir nanocubes with preferential (100) orientation and their unusual enhanced electrocatalytic activities

Zhong

Liu

et al. 2014

Sci. China Mater.

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Pt-Ir nanocubes with (100)-terminated facets were synthesized for the first time and their unusual high electrocatalytic activity for a model reaction (i.e., ammonia oxidation) was reported. The key parameters in controlling the shape of the PtIr nanocubes were systematically investigated by transmission electron microscopy (TEM). The electrocatalytic activities of the prepared Pt-Ir and pure Pt nanoparticles (NPs) were characterized by cyclic voltammetry (CV). The results showed that the amount of W(CO) 6 and the volume ratio of oleylamine and oleic acid play a significant role in the development of well-defined Pt-Ir nanocubes. The resultant Pt-Ir nanocubes exhibit (100) orientation, which has been confirmed by not only the structural characterization results from high-resolution TEM (HRTEM) and X-ray diffraction (XRD) but also hydrogen desorption profiles obtained from the CV measurements in H 2 SO 4 solution. Lattice contraction of the Pt-Ir nanocubes were suggested by HRTEM and XRD measurements, and the electronic interactions between Pt and Ir in the Pt-Ir nanocubes were demonstrated by X-ray photoelectron spectroscopy. The Pt-Ir nanocubes show higher specific activity than pure Pt nanocubes and much higher specific activity than the polycrystalline Pt-Ir NPs. The much improved specific activity of the Pt-Ir nanocubes could be attributed to the reason that the introduction of Ir in the Pt-Ir nanocubes largely maintains the highly active Pt (100) sites and thus a positive synergistic effect through the addition of Ir to Pt could be achieved due to the possible bifunctional mechanism and the electronic effect.

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“…The method involves the impregnation of the support material with a salt solution containing the metal to be deposited, followed by a reduction step (Asano et al, 2006;Liao et al, 2006;Lordi et al, 2001). During an impregnation process, metal ions are initially adsorbed to the surface of functionalized CNTs by homogeneously mixing CNTs with the metal precursors in a solution.…”

Section: Impregnation Methodsmentioning

confidence: 99%

Carbon Nanotubes Supported Metal Nanoparticles for the Applications in Proton Exchange Membrane Fuel Cells (PEMFCs)

Jiang¹,

Jiang²

2011

Carbon Nanotubes - Growth and Applications

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High Performance PtRuIr Catalysts Supported on Carbon Nanotubes for the Anodic Oxidation of Methanol

Cited by 291 publications

References 15 publications

Self-Assembly of Gold Nanoparticles at the Surface of Amine- and Thiol-Functionalized Boron Nitride Nanotubes

Self-Assembly of Gold Nanoparticles at the Surface of Amine- and Thiol-Functionalized Boron Nitride Nanotubes

Shape-controlled synthesis of Pt-Ir nanocubes with preferential (100) orientation and their unusual enhanced electrocatalytic activities

Carbon Nanotubes Supported Metal Nanoparticles for the Applications in Proton Exchange Membrane Fuel Cells (PEMFCs)

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