Morphology and oxidation state of ALD-grown Pd nanoparticles on TiO2- and SrO-terminated SrTiO3 nanocuboids

Bor Rong Chen; Cassandra George; Yuyuan Lin; Linhua Hu; Lawrence Crosby; Xianyi Hu; Peter C. Stair; Laurence D. Marks; Kenneth R. Poeppelmeier; Richard P. Van Duyne; Michael J. Bedzyk

doi:10.1016/j.susc.2015.10.057

Morphology and oxidation state of ALD-grown Pd nanoparticles on TiO₂- and SrO-terminated SrTiO₃ nanocuboids

Bor Rong Chen, Cassandra George, Yuyuan Lin, Linhua Hu, Lawrence Crosby, Xianyi Hu, Peter C. Stair, Laurence D. Marks, Kenneth R. Poeppelmeier, Richard P. Van Duyne, Michael J. Bedzyk

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

16 Scopus citations

Abstract

We employ SrTiO₃ nanocuboid single crystals with well-defined (001) surfaces that are synthesized to have either a TiO₂- or SrO-terminated surface to investigate the influence of surface termination on the morphology and the chemical property of supported metallic nanoparticles. Using such monodispersed STO nanocuboids allows for practical catalytic reaction studies as well as surface studies comparable to a single crystal model catalyst. Pd nanoparticles were grown by atomic layer deposition, which is able to control the effective coverage, chemical state, and the size of the Pd nanoparticles. The properties of Pd nanoparticles were examined by transmission electron microscopy, X-ray absorption spectroscopy, and X-ray photoemission spectroscopy. The morphology and growth pattern for the Pd nanoparticles supported on the SrTiO₃ nanocuboids are shown to depend on the surface termination.

Original language	English (US)
Pages (from-to)	291-298
Number of pages	8
Journal	Surface Science
Volume	648
DOIs	https://doi.org/10.1016/j.susc.2015.10.057
State	Published - Jun 1 2016

Funding

This work was supported by the Institute for Catalysis in Energy Processes (ICEP) at Northwestern University (NU) under DOE Grant DE-FG02-03ER15457 . Electron microscopy was performed at the EPIC facility support by the NU-MRSEC program ( NSF DMR-1121262 ). X-ray measurements were performed at the Advanced Photon Source of Argonne National Lab (ANL), at DND-CAT (Sector 5), which is supported by E.I. DuPont de Nemours & Co. , NU and The Dow Chemical Co. ANL is supported by DOE under grant number DE-AC02-06CH11357 . The X-ray photoemission work was performed in the Keck-II facility of the NUANCE Center at NU. BRC is partially supported by Study Abroad Fellowship from Ministry of Education of Taiwan . LC is supported by a National Science Foundation Graduate Research Fellowship . We thank Qing Ma at DND-CAT for assisting with the XAFS measurements.

Keywords

Atomic layer deposition
Electron microscopy
Strontium titanate
Supported palladium nanoparticles
X-ray absorption spectroscopy
X-ray photoemission spectroscopy

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.susc.2015.10.057

Cite this

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title = "Morphology and oxidation state of ALD-grown Pd nanoparticles on TiO2- and SrO-terminated SrTiO3 nanocuboids",

abstract = "We employ SrTiO3 nanocuboid single crystals with well-defined (001) surfaces that are synthesized to have either a TiO2- or SrO-terminated surface to investigate the influence of surface termination on the morphology and the chemical property of supported metallic nanoparticles. Using such monodispersed STO nanocuboids allows for practical catalytic reaction studies as well as surface studies comparable to a single crystal model catalyst. Pd nanoparticles were grown by atomic layer deposition, which is able to control the effective coverage, chemical state, and the size of the Pd nanoparticles. The properties of Pd nanoparticles were examined by transmission electron microscopy, X-ray absorption spectroscopy, and X-ray photoemission spectroscopy. The morphology and growth pattern for the Pd nanoparticles supported on the SrTiO3 nanocuboids are shown to depend on the surface termination.",

keywords = "Atomic layer deposition, Electron microscopy, Strontium titanate, Supported palladium nanoparticles, X-ray absorption spectroscopy, X-ray photoemission spectroscopy",

author = "Chen, {Bor Rong} and Cassandra George and Yuyuan Lin and Linhua Hu and Lawrence Crosby and Xianyi Hu and Stair, {Peter C.} and Marks, {Laurence D.} and Poeppelmeier, {Kenneth R.} and {Van Duyne}, {Richard P.} and Bedzyk, {Michael J.}",

year = "2016",

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doi = "10.1016/j.susc.2015.10.057",

language = "English (US)",

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journal = "Surface Science",

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AU - Chen, Bor Rong

AU - George, Cassandra

AU - Lin, Yuyuan

AU - Hu, Linhua

AU - Crosby, Lawrence

AU - Hu, Xianyi

AU - Stair, Peter C.

AU - Marks, Laurence D.

AU - Poeppelmeier, Kenneth R.

AU - Van Duyne, Richard P.

AU - Bedzyk, Michael J.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - We employ SrTiO3 nanocuboid single crystals with well-defined (001) surfaces that are synthesized to have either a TiO2- or SrO-terminated surface to investigate the influence of surface termination on the morphology and the chemical property of supported metallic nanoparticles. Using such monodispersed STO nanocuboids allows for practical catalytic reaction studies as well as surface studies comparable to a single crystal model catalyst. Pd nanoparticles were grown by atomic layer deposition, which is able to control the effective coverage, chemical state, and the size of the Pd nanoparticles. The properties of Pd nanoparticles were examined by transmission electron microscopy, X-ray absorption spectroscopy, and X-ray photoemission spectroscopy. The morphology and growth pattern for the Pd nanoparticles supported on the SrTiO3 nanocuboids are shown to depend on the surface termination.

AB - We employ SrTiO3 nanocuboid single crystals with well-defined (001) surfaces that are synthesized to have either a TiO2- or SrO-terminated surface to investigate the influence of surface termination on the morphology and the chemical property of supported metallic nanoparticles. Using such monodispersed STO nanocuboids allows for practical catalytic reaction studies as well as surface studies comparable to a single crystal model catalyst. Pd nanoparticles were grown by atomic layer deposition, which is able to control the effective coverage, chemical state, and the size of the Pd nanoparticles. The properties of Pd nanoparticles were examined by transmission electron microscopy, X-ray absorption spectroscopy, and X-ray photoemission spectroscopy. The morphology and growth pattern for the Pd nanoparticles supported on the SrTiO3 nanocuboids are shown to depend on the surface termination.

KW - Atomic layer deposition

KW - Electron microscopy

KW - Strontium titanate

KW - Supported palladium nanoparticles

KW - X-ray absorption spectroscopy

KW - X-ray photoemission spectroscopy

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