Journal article
Erjia Guan, Alexandre C. Foucher, Nicholas Marcella, T. Shirman, M. Luneau, Ashley R. Head, David M. A. Verbart, J. Aizenberg, C. Friend, D. Stacchiola, E. Stach, A. Frenkel
2020
2020
Semantic Scholar
DOI
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APA
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Guan, E., Foucher, A. C., Marcella, N., Shirman, T., Luneau, M., Head, A. R., … Frenkel, A. (2020). New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts.
Chicago/Turabian
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Guan, Erjia, Alexandre C. Foucher, Nicholas Marcella, T. Shirman, M. Luneau, Ashley R. Head, David M. A. Verbart, et al. “New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts” (2020).
MLA
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Guan, Erjia, et al. New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts. 2020.
BibTeX Click to copy
@article{erjia2020a,
title = {New Role of Pd Hydride as a Sensor of Surface Pd Distributions in Pd−Au Catalysts},
year = {2020},
author = {Guan, Erjia and Foucher, Alexandre C. and Marcella, Nicholas and Shirman, T. and Luneau, M. and Head, Ashley R. and Verbart, David M. A. and Aizenberg, J. and Friend, C. and Stacchiola, D. and Stach, E. and Frenkel, A.}
}
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.
