Structural Models and Atomic Distribution of Bimetallic Nanoparticles as Investigated by X-ray Absorption Spectroscopy

Hwang, Bing‐Joe; Sarma, Loka Subramanyam; Chen, Jiun-Ming; Chen, Ching‐Hsiang; Shih, Shou-Chu; Wang, Guo‐Rung; Liu, Din‐Goa; Lee, Jyh‐Fu; Tang, Mau‐Tsu

doi:10.1021/ja0526618

Cited by 240 publications

(236 citation statements)

References 47 publications

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“…The typical electron beam energy was 2.5 GeV, and the current was 200 mA. The EXAFS data were analysed by the IFEFFIT data analysis package according to the standard procedures 54 . The background was removed by extrapolating the pre-edge region onto the EXAFS region, and the w(E) data were normalized with respect to the edge jump step using the Athena program of the IFEFFIT package.…”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, the k 1 w(k) data in k-space ranging from 3.1 to 13.5 Å À 1 were Fourier-transformed to the R-space. The processed w(k) data were fitted in R space ranging from 1.3 to 3.7 Å using the Artemis program of the IFEFFIT package 54 . From these analyses, structural parameters including coordination number (N), coordination distance (R), Debye-Waller factors and inner potential correction (DE 0 ) were obtained.…”

Section: Methodsmentioning

confidence: 99%

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ε-Iron carbide as a low-temperature Fischer–Tropsch synthesis catalyst

et al. 2014

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e-Iron carbide has been predicted to be promising for low-temperature Fischer-Tropsch synthesis (LTFTS) targeting liquid fuel production. However, directional carbidation of metallic iron to e-iron carbide is challenging due to kinetic hindrance. Here we show how rapidly quenched skeletal iron featuring nanocrystalline dimensions, low coordination number and an expanded lattice may solve this problem. We find that the carbidation of rapidly quenched skeletal iron occurs readily in situ during LTFTS at 423-473 K, giving an e-iron carbidedominant catalyst that exhibits superior activity to literature iron and cobalt catalysts, and comparable to more expensive noble ruthenium catalyst, coupled with high selectivity to liquid fuels and robustness without the aid of electronic or structural promoters. This finding may permit the development of an advanced energy-efficient and clean fuel-oriented FTS process on the basis of a cost-effective iron catalyst.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

ε-Iron carbide as a low-temperature Fischer–Tropsch synthesis catalyst

et al. 2014

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“…11,14,15 Surface structure and coordination number at the surface can be determined for nanoparticles if the interior is assumed to have bulklike coordination values. 15,16 EXAFS has been used successfully to characterize structures in nanoparticle metal and bi-metallic clusters made through gas-phase synthesis on supports, 11,[17][18][19][20] and metal and semiconductor nanoparticles made through solution-phase chemistry. 15,16,[21][22][23][24][25] The use of EXAFS to characterize chemical transformations in nanoparticles (NPs) is relatively rare.…”

mentioning

confidence: 99%

The structural evolution and diffusion during the chemical transformation from cobalt to cobalt phosphide nanoparticles

et al. 2011

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“…This advantage in CO ads oxidation kinetics is likely due to the modified atomistic distribution, electronic structure, and particle size of the catalyst particles and their individual components. 40,41 In Fig. 3c, the chronoamperometric measurements show that the PtRuNi ͑10 W͒ catalyst has the highest performance for methanol oxidation.…”

Section: ͓2͔mentioning

confidence: 97%

Ternary PtRuNi Nanocatalysts Supported on N-Doped Carbon Nanotubes: Deposition Process, Material Characterization, and Electrochemistry

Sun

Hsu

Lin

et al. 2009

J. Electrochem. Soc.

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Ternary PtRuNi nanocatalysts supported on N-doped carbon nanotubes: deposition process, materials characterization, and electrochemistry Sun, C-L.; Hsu, Y-K.; Lin, Y-G.; Chen, K-H.; Bock, C.; MacDougall, Barry; Wuy, X.; Chen, L-C.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=12441124&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=12441124&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1149/1.3194800 Society, 156, 10, 2009 Ternary PtRuNi Nanocatalysts Supported on N-Doped Carbon Nanotubes: Deposition Process, Material Characterization, and Electrochemistry One-dimensional electrodes consisting of N-doped carbon nanotubes and ternary PtRuNi metal catalysts deposited via a vacuum deposition are made. Material analysis shows that high density nanoparticles that are well dispersed on the nanotube surface are deposited. The average catalyst particle size is between 3 and 4.5 nm depending on the sputtering conditions. The methanol oxidation current of the ternary PtRuNi catalysts increases up to a factor of 2.6 as compared to the binary PtRu catalyst. Our studies shed light on the advanced control of nanotube-supported electrocatalysts under a low loading via the vacuum deposition techniques and can contribute to the controlled synthesis and understanding of fuel-cell catalysts. Journal of the Electrochemical

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Structural Models and Atomic Distribution of Bimetallic Nanoparticles as Investigated by X-ray Absorption Spectroscopy

Cited by 240 publications

References 47 publications

ε-Iron carbide as a low-temperature Fischer–Tropsch synthesis catalyst

ε-Iron carbide as a low-temperature Fischer–Tropsch synthesis catalyst

The structural evolution and diffusion during the chemical transformation from cobalt to cobalt phosphide nanoparticles

Ternary PtRuNi Nanocatalysts Supported on N-Doped Carbon Nanotubes: Deposition Process, Material Characterization, and Electrochemistry

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