Shape and Composition-Controlled Platinum Alloy Nanocrystals Using Carbon Monoxide as Reducing Agent

Wu, Jianbo; Gross, Adam F.; Yang, Hong

doi:10.1021/nl104094p

Cited by 445 publications

(437 citation statements)

References 40 publications

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“…1e). The XRD result also excludes formation of Pt-Ni alloy 46 . The Ni(OH) 2 2 deduced from their ECSA result is B35%, and hence the exposed Pt atoms account for B65%.…”

Section: Resultsmentioning

confidence: 77%

Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity

et al. 2015

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Design and synthesis of effective electrocatalysts for hydrogen evolution reaction in alkaline environments is critical to reduce energy losses in alkaline water electrolysis. Here we report a hybrid nanomaterial comprising of one-dimensional ultrathin platinum nanowires grown on two-dimensional single-layered nickel hydroxide. Judicious surface chemistry to generate the fully exfoliated nickel hydroxide single layers is explored to be the key for controllable growth of ultrathin platinum nanowires with diameters of about 1.8 nm. Impressively, this hybrid nanomaterial exhibits superior electrocatalytic activity for hydrogen evolution reaction in alkaline solution, which outperforms currently reported catalysts, and the obviously improved catalytic stability. We believe that this work may lead towards the development of singlelayered metal hydroxide-based hybrid materials for applications in catalysis and energy conversion.

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“…1e). The XRD result also excludes formation of Pt-Ni alloy 46 . The Ni(OH) 2 2 deduced from their ECSA result is B35%, and hence the exposed Pt atoms account for B65%.…”

Section: Resultsmentioning

confidence: 77%

Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity

et al. 2015

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“…[1] Because of their unique structures, CNCs can not only have the combination of attractive properties of cuboctahedron, truncated octahedron, icosahedron, and so on. [11] Although Pt based nanoparticles with a high surface to volume ratio possess a dramatically enhanced catalytic activity owning to its large electrochemical surface area (ECSA), those nanoparticles usually suffer from poor stability because of the high surface energy. [12] It is therefore highly desired to develop a new structure to overcome this limitation.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal Synthesis of Alloyed PtNi Colloidal Nanocrystal Clusters (CNCs) with Enhanced Catalytic Activity for Methanol Oxidation

Yang

Yuan

et al. 2017

Adv Funct Materials

138

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Colloidal nanocrystal clusters (CNCs), which are composed of many nanocrystal subunits, have attracted intensive attention because they can possess not only the properties of each single subunit but also the collective properties and novel functionalities resulting from the ensembles. However, to date, the successful preparation of metal CNCs has rarely been reported. In this work, a simple one-pot solvothermal method is developed to prepare PtNi-alloyed CNCs with homogeneous distribution of Pt and Ni elements, porous feature, and interconnected steady framework. The PtNi CNCs are composed of many PtNi nanocrystals with size around 7-8 nm. Their growth mechanism is proposed through a systematic study. Thanks to the unique structure, the as-prepared PtNi CNCs show better catalytic performance in methanol oxidation reaction than that of PtNi nanocrystals and Pt/C catalysts. This work is important because it not only provides a new method for the preparation of metal CNCs with desired morphology and properties, but also paves the way for practical applications of metal nanoparticles.

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“…Controlling the shape and facets of nanocrystals is an effective way to enhance the performance in catalytic reactions [5][6][7][8]. Recently, several researches have been aimed towards the electrocatalytic studies of shape-controlled Pt-Pd alloy nanocrystals [3,[5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

Jukk

Kongi

Tammeveski

et al. 2015

Electrochemistry Communications

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In this work, PdPt alloy nanocubes with different metal ratios were synthesised in the presence of polyvinylpyrrolidone (PVP). The surface morphology of the PdPt samples was characterised by transmission electron microscopy (TEM). TEM images showed that PdPt nanoparticles were cubic-shaped and the average size of the cubes was about 8-10 nm. Their electrocatalytic activity towards the oxygen reduction reaction (ORR) was studied in 0.5 M H 2 SO 4 using the rotating disk electrode method. All the alloyed catalysts showed enhanced electrocatalytic activity for ORR as compared to the monometallic cubic Pd nanoparticles.Half-wave potential values for PdPt catalysts were comparable with that of Pt nanocubes.From the alloyed catalysts Pd 36 Pt 64 exhibited the highest specific activity, which was only slightly lower than that of cubic Pt nanoparticles. The Koutecky-Levich analysis revealed that the reduction of oxygen proceeded via 4-electron pathway on all the electrocatalysts studied.

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Shape and Composition-Controlled Platinum Alloy Nanocrystals Using Carbon Monoxide as Reducing Agent

Cited by 445 publications

References 40 publications

Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity

Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity

Solvothermal Synthesis of Alloyed PtNi Colloidal Nanocrystal Clusters (CNCs) with Enhanced Catalytic Activity for Methanol Oxidation

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

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