Polyol Process Synthesis of Monodispersed FePt Nanoparticles

Liu, Chao; Wu, Xiaowei; Klemmer, T. J.; Shukla, Nisha; Yang, XiaoMin; Weller, D.; Roy, Anish; Tanase, M.; Laughlin, David E.

doi:10.1021/jp0312971

Cited by 154 publications

(94 citation statements)

References 11 publications

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“…Toda et al [146] reported that oxygen adsorption increases in the case of changing of the electronic structure of Pt induced by a transition metal, and then the O-O bond is weakened. For this purpose, various platinum-based bimetallic catalysts, such as Pt-Ni [147,148], Pt-Co [149,150], Pt-Fe [151,152], Pt-Cr [153,154], Pt-Cu [155,156], Pt-V [157,158], Pt-Mn [159], Pt-Bi [35], Pt-Te [160] have been reported. It can be clearly emphasized that modified-platinum catalysts display 1.5-3 times higher catalytic activity than that of pure platinum catalyst.…”

Section: Orr Activity On Various Carbon Supported Nanoparticles Prepamentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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Abstract:The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpected fundamental modifications compared to the corresponding bulk state. To address these fundamental issues, various synthetic routes have been developed in order to provide more versatile carbon-supported low platinum catalysts. Consequently, the approach of using nanocatalysts may overcome the drawbacks encountered in massive materials for energy conversion. This review paper aims at summarizing the recent important advances in carbon-supported metal nanoparticles preparation from colloidal methods (microemulsion, polyol, impregnation, Bromide Anion Exchange…) as cathode material in low temperature FCs. Special attention is devoted to the correlation of the structure of the nanoparticles and their catalytic properties. The influence of the synthesis method on the electrochemical properties of the resulting catalysts is also discussed. Emphasis on analyzing data from theoretical models to address the intrinsic and specific electrocatalytic properties, depending on the synthetic method, is incorporated throughout. The synthesis process-nanomaterials structure-catalytic activity relationships highlighted herein, provide ample new rational, convenient and OPEN ACCESSCatalysts 2015, 5 311 straightforward strategies and guidelines toward more effective nanomaterials design for energy conversion.

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Section: Orr Activity On Various Carbon Supported Nanoparticles Prepamentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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“…polyvinylpyrrolidone) and microwave heating, various types of nanoparticles have been synthetized . Metals (Ni [6,7], Co [8,9], Cu [10], Pd [11], Ag [12][13][14], Pt [15][16][17], Au, [18,19] ), alloys [9,[19][20][21][22][23][24][25], oxides (MgO, TiO 2 , ZnO, SnO 2 , Gd 2 O 3 , Fe oxides and ferrites, hydroxyapatite [26][27][28][29][30][31][32][33][34][35], metal-polymer nanocomposites [36], supported metal catalysts [37][38][39][40], have been designed.…”

Section: Direct Methods For the Preparation Of Nanoparticlesmentioning

confidence: 99%

Nanoparticles of metal and metal oxides: some peculiar synthesis methods, size and shape control, application to catalysts preparation

Bozon‐Verduraz¹,

Fiévet²,

Piquemal³

et al. 2009

Braz. J. Phys.

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One step (direct) and multisteps synthesis methods of metal and oxide nanoparticles are presented including both bottom-up and top-down procedures. Chemical methods involving the polyol process allows to get either isotropic or anisotropic nanoparticles. Nanowires, nanorods and dumbells can be generated either by heterogeneous nucleation or by using a template (mesoporous silica). Top-down procedures are illustrated by laser irradiation of immersed bulk targets (Ag, Au) which generates self-organized nanostructures or colloidal solutions. Laser irradiation of these colloidal solutions modifies the size distribution and the shape of nanoparticles. Bimetallic nanoparticles are generated from mixtures of monometallic colloidal solutions. Surface-mediated methods involving a host support and an invited phase are also presented. They lead to the formation of metal or oxide clusters and nanoparticles. The speciation of these entities is correlated with the observed catalytic performances.

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“…5,6 A plethora of techniques exist for the synthesis of FePt nanoparticles including coreduction of precursors, single source molecular precursors, and solid-state reactions. [7][8][9][10][11][12][13][14][15][16] However, few have considered ternary alloys with Fe and Pt. Most reports focus on the addition of a third element dopant keeping the stoichiometry between Fe and Pt fixed with the purpose of reducing ordering temperature.…”

Section: Introductionmentioning

confidence: 99%

Chemical synthesis of L1 Fe-Pt-Ni alloy nanoparticles

et al. 2017

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This work focuses on the study of the magnetic and structural properties of chemically synthesized FePt1-xNix nanoparticles, with Ni content x in the range 0.2-0.4. We report the effect of Ni substitution on the L10 structure, on both the as-synthesized and annealed nanoparticles. A decrease in nanoparticle size as well as in chemical order is observed with an increase in Ni content, for both the as-made and annealed nanoparticles. The results also show that the post annealing procedure at 700oC significantly enhanced the L10 ordering of the nanoparticles. Substitution of nickel leads to a decrease in coercivity from 14.9 kOe in FePt to 0.8 kOe for FePt0.6Ni0.4 alloy, while the magnetization at 3 T is increased from 48 emu/g to 88 emu/g.

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Polyol Process Synthesis of Monodispersed FePt Nanoparticles

Cited by 154 publications

References 11 publications

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Nanoparticles of metal and metal oxides: some peculiar synthesis methods, size and shape control, application to catalysts preparation

Chemical synthesis of L1 Fe-Pt-Ni alloy nanoparticles

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