A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe3O4 Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy

Chang Wan Han; Tej Choksi; Cory Milligan; Paulami Majumdar; Michael Manto; Yanran Cui; Xiahan Sang; Raymond R. Unocic; Dmitry Zemlyanov; Chao Wang; Fabio H. Ribeiro; Jeffrey Greeley; Volkan Ortalan

doi:10.1021/acs.nanolett.7b00827

A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe₃O₄ Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy

Chang Wan Han
, Tej Choksi
, Cory Milligan
, Paulami Majumdar
, Michael Manto
, Yanran Cui
, Xiahan Sang
, Raymond R. Unocic
, Dmitry Zemlyanov
, Chao Wang
, Fabio H. Ribeiro
, Jeffrey Greeley
, Volkan Ortalan

Materials MicroAnalysis

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

The strength of metal-support bonding in heterogeneous catalysts determines their thermal stability, therefore, a tremendous amount of effort has been expended to understand metal-support interactions. Herein, we report the discovery of an anomalous "strong metal-support bonding" between gold nanoparticles and "nano-engineered" Fe₃O₄ substrates by in situ microscopy. During in situ vacuum annealing of Au-Fe₃O₄ dumbbell-like nanoparticles, synthesized by the epitaxial growth of nano-Fe₃O₄ on Au nanoparticles, the gold nanoparticles transform into the gold thin films and wet the surface of nano-Fe₃O₄, as the surface reduction of nano-Fe₃O₄ proceeds. This phenomenon results from a unique coupling of the size-and shape-dependent high surface reducibility of nano-Fe₃O₄ and the extremely strong adhesion between Au and the reduced Fe₃O₄. This strong metal-support bonding reveals the significance of controlling the metal oxide support size and morphology for optimizing metal-support bonding and ultimately for the development of improved catalysts and functional nanostructures.

Original language	English
Pages (from-to)	4576-4582
Number of pages	7
Journal	Nano Letters
Volume	17
Issue number	8
DOIs	https://doi.org/10.1021/acs.nanolett.7b00827
State	Published - Aug 9 2017

Keywords

Heterogeneous catalysis
density functional theory
electron microscopy
gold catalyst
metalâsupport interaction

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10.1021/acs.nanolett.7b00827

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Han, C. W., Choksi, T., Milligan, C., Majumdar, P., Manto, M., Cui, Y., Sang, X., Unocic, R. R., Zemlyanov, D., Wang, C., Ribeiro, F. H., Greeley, J., & Ortalan, V. (2017). A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe₃O₄ Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy. Nano Letters, 17(8), 4576-4582. https://doi.org/10.1021/acs.nanolett.7b00827

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title = "A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe3O4 Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy",

abstract = "The strength of metal-support bonding in heterogeneous catalysts determines their thermal stability, therefore, a tremendous amount of effort has been expended to understand metal-support interactions. Herein, we report the discovery of an anomalous {"}strong metal-support bonding{"} between gold nanoparticles and {"}nano-engineered{"} Fe3O4 substrates by in situ microscopy. During in situ vacuum annealing of Au-Fe3O4 dumbbell-like nanoparticles, synthesized by the epitaxial growth of nano-Fe3O4 on Au nanoparticles, the gold nanoparticles transform into the gold thin films and wet the surface of nano-Fe3O4, as the surface reduction of nano-Fe3O4 proceeds. This phenomenon results from a unique coupling of the size-and shape-dependent high surface reducibility of nano-Fe3O4 and the extremely strong adhesion between Au and the reduced Fe3O4. This strong metal-support bonding reveals the significance of controlling the metal oxide support size and morphology for optimizing metal-support bonding and ultimately for the development of improved catalysts and functional nanostructures.",

keywords = "Heterogeneous catalysis, density functional theory, electron microscopy, gold catalyst, metal{\^a}support interaction",

author = "Han, \{Chang Wan\} and Tej Choksi and Cory Milligan and Paulami Majumdar and Michael Manto and Yanran Cui and Xiahan Sang and Unocic, \{Raymond R.\} and Dmitry Zemlyanov and Chao Wang and Ribeiro, \{Fabio H.\} and Jeffrey Greeley and Volkan Ortalan",

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month = aug,

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doi = "10.1021/acs.nanolett.7b00827",

language = "English",

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Han, CW, Choksi, T, Milligan, C, Majumdar, P, Manto, M, Cui, Y, Sang, X, Unocic, RR, Zemlyanov, D, Wang, C, Ribeiro, FH, Greeley, J & Ortalan, V 2017, 'A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe₃O₄ Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy', Nano Letters, vol. 17, no. 8, pp. 4576-4582. https://doi.org/10.1021/acs.nanolett.7b00827

TY - JOUR

T1 - A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe3O4 Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy

AU - Han, Chang Wan

AU - Choksi, Tej

AU - Milligan, Cory

AU - Majumdar, Paulami

AU - Manto, Michael

AU - Cui, Yanran

AU - Sang, Xiahan

AU - Unocic, Raymond R.

AU - Zemlyanov, Dmitry

AU - Wang, Chao

AU - Ribeiro, Fabio H.

AU - Greeley, Jeffrey

AU - Ortalan, Volkan

PY - 2017/8/9

Y1 - 2017/8/9

N2 - The strength of metal-support bonding in heterogeneous catalysts determines their thermal stability, therefore, a tremendous amount of effort has been expended to understand metal-support interactions. Herein, we report the discovery of an anomalous "strong metal-support bonding" between gold nanoparticles and "nano-engineered" Fe3O4 substrates by in situ microscopy. During in situ vacuum annealing of Au-Fe3O4 dumbbell-like nanoparticles, synthesized by the epitaxial growth of nano-Fe3O4 on Au nanoparticles, the gold nanoparticles transform into the gold thin films and wet the surface of nano-Fe3O4, as the surface reduction of nano-Fe3O4 proceeds. This phenomenon results from a unique coupling of the size-and shape-dependent high surface reducibility of nano-Fe3O4 and the extremely strong adhesion between Au and the reduced Fe3O4. This strong metal-support bonding reveals the significance of controlling the metal oxide support size and morphology for optimizing metal-support bonding and ultimately for the development of improved catalysts and functional nanostructures.

AB - The strength of metal-support bonding in heterogeneous catalysts determines their thermal stability, therefore, a tremendous amount of effort has been expended to understand metal-support interactions. Herein, we report the discovery of an anomalous "strong metal-support bonding" between gold nanoparticles and "nano-engineered" Fe3O4 substrates by in situ microscopy. During in situ vacuum annealing of Au-Fe3O4 dumbbell-like nanoparticles, synthesized by the epitaxial growth of nano-Fe3O4 on Au nanoparticles, the gold nanoparticles transform into the gold thin films and wet the surface of nano-Fe3O4, as the surface reduction of nano-Fe3O4 proceeds. This phenomenon results from a unique coupling of the size-and shape-dependent high surface reducibility of nano-Fe3O4 and the extremely strong adhesion between Au and the reduced Fe3O4. This strong metal-support bonding reveals the significance of controlling the metal oxide support size and morphology for optimizing metal-support bonding and ultimately for the development of improved catalysts and functional nanostructures.

KW - Heterogeneous catalysis

KW - density functional theory

KW - electron microscopy

KW - gold catalyst

KW - metalâsupport interaction

UR - https://www.scopus.com/pages/publications/85027104094

U2 - 10.1021/acs.nanolett.7b00827

DO - 10.1021/acs.nanolett.7b00827

M3 - Article

C2 - 28650641

AN - SCOPUS:85027104094

SN - 1530-6984

VL - 17

SP - 4576

EP - 4582

JO - Nano Letters

JF - Nano Letters

IS - 8

ER -

A Discovery of Strong Metal-Support Bonding in Nanoengineered Au-Fe₃O₄ Dumbbell-like Nanoparticles by in Situ Transmission Electron Microscopy

Abstract

Keywords

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