New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts

Erjia Guan; Alexandre C. Foucher; Nicholas Marcella; Tanya Shirman; Mathilde Luneau; Ashley R. Head; David M.A. Verbart; Joanna Aizenberg; Cynthia M. Friend; Dario Stacchiola; Eric A. Stach; Anatoly I. Frenkel

doi:10.1002/cctc.201901847

New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts

Erjia Guan
, Alexandre C. Foucher
, Nicholas Marcella
, Tanya Shirman
, Mathilde Luneau
, Ashley R. Head
, David M.A. Verbart
, Joanna Aizenberg
, Cynthia M. Friend
, Dario Stacchiola
, Eric A. Stach
, Anatoly I. Frenkel

Materials Science and Engineering

Stony Brook University
University of Pennsylvania
Harvard University
Brookhaven National Laboratory

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

21 Scopus citations

Abstract

Isolated or contiguous, the surface distributions of Pd atoms in the Pd−Au bimetallic nanoparticle (NP) catalysts often influence activity and selectivity towards specific reactions. In this study, we used a concomitant Pd hydride formation upon H₂ exposure as a probe of presence of contiguous Pd regions in bimetallic NPs. For demonstrating this method, we prepared silica supported monometallic Pd and bimetallic Pd−Au NPs with a Pd/Au ratio of 25/75 (Pd₂₅Au₇₅) and used X-ray absorption spectroscopy, scanning transmission electron microscopy and infrared spectroscopy to detect and quantitatively analyze the Pd hydride regions. This work provides a new approach to characterizing intra-particle heterogeneities within the bimetallic NPs at ambient temperature and pressure.

Original language	English
Pages (from-to)	717-721
Number of pages	5
Journal	ChemCatChem
Volume	12
Issue number	3
DOIs	https://doi.org/10.1002/cctc.201901847
State	Published - Feb 6 2020

Keywords

Bimetallic catalysts
Pd hydride
Pd−Au nanoparticles
Surface heterogeneity
X-ray absorption spectroscopy

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10.1002/cctc.201901847

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title = "New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts",

abstract = "Isolated or contiguous, the surface distributions of Pd atoms in the Pd−Au bimetallic nanoparticle (NP) catalysts often influence activity and selectivity towards specific reactions. In this study, we used a concomitant Pd hydride formation upon H2 exposure as a probe of presence of contiguous Pd regions in bimetallic NPs. For demonstrating this method, we prepared silica supported monometallic Pd and bimetallic Pd−Au NPs with a Pd/Au ratio of 25/75 (Pd25Au75) and used X-ray absorption spectroscopy, scanning transmission electron microscopy and infrared spectroscopy to detect and quantitatively analyze the Pd hydride regions. This work provides a new approach to characterizing intra-particle heterogeneities within the bimetallic NPs at ambient temperature and pressure.",

keywords = "Bimetallic catalysts, Pd hydride, Pd−Au nanoparticles, Surface heterogeneity, X-ray absorption spectroscopy",

author = "Erjia Guan and Foucher, \{Alexandre C.\} and Nicholas Marcella and Tanya Shirman and Mathilde Luneau and Head, \{Ashley R.\} and Verbart, \{David M.A.\} and Joanna Aizenberg and Friend, \{Cynthia M.\} and Dario Stacchiola and Stach, \{Eric A.\} and Frenkel, \{Anatoly I.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2020",

month = feb,

day = "6",

doi = "10.1002/cctc.201901847",

language = "English",

volume = "12",

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T1 - New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts

AU - Guan, Erjia

AU - Foucher, Alexandre C.

AU - Marcella, Nicholas

AU - Shirman, Tanya

AU - Luneau, Mathilde

AU - Head, Ashley R.

AU - Verbart, David M.A.

AU - Aizenberg, Joanna

AU - Friend, Cynthia M.

AU - Stacchiola, Dario

AU - Stach, Eric A.

AU - Frenkel, Anatoly I.

PY - 2020/2/6

Y1 - 2020/2/6

N2 - Isolated or contiguous, the surface distributions of Pd atoms in the Pd−Au bimetallic nanoparticle (NP) catalysts often influence activity and selectivity towards specific reactions. In this study, we used a concomitant Pd hydride formation upon H2 exposure as a probe of presence of contiguous Pd regions in bimetallic NPs. For demonstrating this method, we prepared silica supported monometallic Pd and bimetallic Pd−Au NPs with a Pd/Au ratio of 25/75 (Pd25Au75) and used X-ray absorption spectroscopy, scanning transmission electron microscopy and infrared spectroscopy to detect and quantitatively analyze the Pd hydride regions. This work provides a new approach to characterizing intra-particle heterogeneities within the bimetallic NPs at ambient temperature and pressure.

AB - Isolated or contiguous, the surface distributions of Pd atoms in the Pd−Au bimetallic nanoparticle (NP) catalysts often influence activity and selectivity towards specific reactions. In this study, we used a concomitant Pd hydride formation upon H2 exposure as a probe of presence of contiguous Pd regions in bimetallic NPs. For demonstrating this method, we prepared silica supported monometallic Pd and bimetallic Pd−Au NPs with a Pd/Au ratio of 25/75 (Pd25Au75) and used X-ray absorption spectroscopy, scanning transmission electron microscopy and infrared spectroscopy to detect and quantitatively analyze the Pd hydride regions. This work provides a new approach to characterizing intra-particle heterogeneities within the bimetallic NPs at ambient temperature and pressure.

KW - Bimetallic catalysts

KW - Pd hydride

KW - Pd−Au nanoparticles

KW - Surface heterogeneity

KW - X-ray absorption spectroscopy

UR - https://www.scopus.com/pages/publications/85076348409

U2 - 10.1002/cctc.201901847

DO - 10.1002/cctc.201901847

M3 - Article

AN - SCOPUS:85076348409

SN - 1867-3880

VL - 12

SP - 717

EP - 721

JO - ChemCatChem

JF - ChemCatChem

IS - 3

ER -

New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts

Abstract

Keywords

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