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On the Origin of Sinter‐Resistance and Catalyst Accessibility in Raspberry‐Colloid‐Templated Catalyst Design

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [1];  [1]
  1. Department of Chemistry and Chemical Biology Harvard University Cambridge MA 02138 USA, Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA
  2. Center for Nanoscale Systems Harvard University Cambridge MA 02138 USA
  3. Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA
  4. Department of Mechanical Engineering Northwestern University Evanston IL 60208 USA
  5. Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA, Computational Research Division Lawrence Berkeley Laboratory Berkeley CA 94720 USA
  6. Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA, Center for Nanoscale Systems Harvard University Cambridge MA 02138 USA
Abstract

Nanoparticle (NP) sintering is a major cause of the deactivation of supported catalysts. Raspberry‐colloid‐templated (RCT) catalysts are an emerging class of materials that show an unprecedented level of sinter‐resistance and exhibit high catalytic activity. Here a comprehensive study of the origin of NP stability and accessibility in RCT catalysts using theoretical modeling, 3D electron microscopy, and epitaxial overgrowth is reported. The approach is showcased for silica‐based RCT catalysts containing dilute Pd‐in‐Au NPs previously used in hydrogenation and oxidation catalysis. Modeling of the contact line of the silica precursor infiltrating into the assembled raspberry colloids suggests that a large part of the particles must be embedded into silica, which is confirmed by quantitative visualization of >200 individual NPs by dual‐axis electron tomography. The RCT catalysts have a unique structure in which all NPs reside at the pore wall but have >50% of their surface embedded in the matrix, giving rise to the strongly enhanced thermal and mechanical stability. Importantly, epitaxial overgrowth of Ag on the supported NPs reveals that not only the NP surface exposed to the pore but the embedded interface as well remained chemically accessible. This mechanistic understanding provides valuable guidance in the design of stable catalytic materials.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; SC0012573; SC0012573
OSTI ID:
1818828
Alternate ID(s):
OSTI ID: 1818829
OSTI ID: 1825003
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 49 Vol. 31; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (51)

Modular Design of Advanced Catalytic Materials Using Hybrid Organic-Inorganic Raspberry Particles journal December 2017
Electron Tomography: A Three-Dimensional Analytic Tool for Hard and Soft Materials Research journal June 2015
New Strategies for the Preparation of Sinter‐Resistant Metal‐Nanoparticle‐Based Catalysts journal July 2019
High-Temperature-Stable Catalysts by Hollow Sphere Encapsulation journal December 2006
New Architectures for Designed Catalysts: Selective Oxidation using AgAu Nanoparticles on Colloid-Templated Silica journal November 2017
Embedded Phases: A Way to Active and Stable Catalysts journal January 2010
Computer Visualization of Three-Dimensional Image Data Using IMOD journal January 1996
Dual-Axis Tomography: An Approach with Alignment Methods That Preserve Resolution journal December 1997
One-pot synthesis of thermally stable gold@mesoporous silica core-shell nanospheres with catalytic activity journal September 2013
Thermal stability of oxide-supported gold nanoparticles journal May 2019
Double-tilt electron tomography journal October 1995
The location of gold nanoparticles on titania: A study by high resolution aberration-corrected electron microscopy and 3D electron tomography journal February 2011
Raspberry colloid-templated approach for the synthesis of palladium-based oxidation catalysts with enhanced hydrothermal stability and low-temperature activity journal January 2021
Progress in electron tomography to assess the 3D nanostructure of catalysts journal June 2013
Reducing the missing wedge: High-resolution dual axis tomography of inorganic materials journal October 2006
Size-Controlled Synthesis of Sub-10-nanometer Citrate-Stabilized Gold Nanoparticles and Related Optical Properties. journal February 2016
Dilute Pd/Au Alloy Nanoparticles Embedded in Colloid-Templated Porous SiO 2 : Stable Au-Based Oxidation Catalysts journal July 2019
Bimetallic Nanocrystals: Syntheses, Properties, and Applications journal July 2016
Connecting Hindered Transport in Porous Media across Length Scales: From Single-Pore to Macroscopic journal October 2020
Entropic Control of HD Exchange Rates over Dilute Pd-in-Au Alloy Nanoparticle Catalysts journal June 2021
Mechanistic Understanding and the Rational Design of Sinter-Resistant Heterogeneous Catalysts journal September 2017
Achieving High Selectivity for Alkyne Hydrogenation at High Conversions with Compositionally Optimized PdAu Nanoparticle Catalysts in Raspberry Colloid-Templated SiO 2 journal November 2019
Structural Control over Bimetallic Core–Shell Nanorods for Surface-Enhanced Raman Spectroscopy journal March 2021
Sintering of Catalytic Nanoparticles: Particle Migration or Ostwald Ripening? journal April 2013
Engineering Catalytic Contacts and Thermal Stability: Gold/Iron Oxide Binary Nanocrystal Superlattices for CO Oxidation journal January 2013
Nanoreactors: Small Spaces, Big Implications in Chemistry journal June 2016
Electron Tomography of Nanoparticle Catalysts on Porous Supports:  A New Technique Based on Rutherford Scattering journal August 2001
Mechanism of Silver(I)-Assisted Growth of Gold Nanorods and Bipyramids journal October 2005
Corking and Uncorking a Catalytic Yolk-Shell Nanoreactor: Stable Gold Catalyst in Hollow Silica Nanosphere journal November 2011
Two-Dimensional Arrays of Colloidal Gold Particles:  A Flexible Approach to Macroscopic Metal Surfaces journal January 1996
Dual-Axis Electron Tomography for Three-Dimensional Observations of Polymeric Nanostructures journal October 2005
Quantitative Measurement of the Surface Self-Diffusion on Au Nanoparticles by Aberration-Corrected Transmission Electron Microscopy journal February 2012
Nanogold: A Quantitative Phase Map journal May 2009
Selective Deposition of Metal Nanoparticles Inside or Outside Multiwalled Carbon Nanotubes journal July 2009
Electron tomography at 2.4-ångström resolution journal March 2012
Adsorbate-mediated strong metal–support interactions in oxide-supported Rh catalysts journal September 2016
Towards stable catalysts by controlling collective properties of supported metal nanoparticles journal November 2012
Fiji: an open-source platform for biological-image analysis journal June 2012
Unlocking synergy in bimetallic catalysts by core–shell design journal May 2021
In situ quantitative single-molecule study of dynamic catalytic processes in nanoconfinement journal January 2018
Sinter-resistant metal nanoparticle catalysts achieved by immobilization within zeolite crystals via seed-directed growth journal July 2018
Enhancing catalytic performance of dilute metal alloy nanomaterials journal April 2020
Sintering-Resistant Nanoparticles in Wide-Mouthed Compartments for Sustained Catalytic Performance journal February 2017
Silica–titania hybrids for structurally robust inverse opals with controllable refractive index journal January 2020
The dynamic behavior of dilute metallic alloy Pd x Au 1−x /SiO 2 raspberry colloid templated catalysts under CO oxidation journal January 2021
Wet chemical synthesis of silver nanorods and nanowires of controllable aspect ratio journal January 2001
Role of pore curvature on the thermal stability of gold nanoparticles in mesoporous silica journal January 2004
The Surface Evolver journal January 1992
Classical strong metal–support interactions between gold nanoparticles and titanium dioxide journal October 2017
The Impact of Nanoscience on Heterogeneous Catalysis journal March 2003
scikit-image: image processing in Python journal January 2014

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