Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation

Ounjit Sodpiban; Tanika Kessaratikoon; Jacob Smith; Guodong Ren; Silvano Del Gobbo; Sonali Das; Miaofang Chi; Valerio D’Elia; Bruce C. Gates

doi:10.1021/acsami.3c13708

Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation

Ounjit Sodpiban, Tanika Kessaratikoon, Jacob Smith, Guodong Ren, Silvano Del Gobbo, Sonali Das, Miaofang Chi, Valerio D’Elia, Bruce C. Gates

electron Microscopy and Microanalysis

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

1 Scopus citations

Abstract

Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeO_x and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.

Original language	English
Pages (from-to)	55885-55894
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	15
Issue number	48
DOIs	https://doi.org/10.1021/acsami.3c13708
State	Published - Dec 6 2023

Funding

This work was supported by the National Research Council of Thailand, Grants N41A640170 and N42A650196, which provided support for the work by O.S. at the University of California, where the work was supported by the U.S. Department of Energy, Basic Energy Sciences, Grant DE-FG02-04ER15513. J.S. and M.C. were supported by a DOE-BES Early Career Award. Microscopy was performed at the Center for Nanophase Materials Sciences, a DOE Office of Science User Facility at Oak Ridge National Laboratory. We thank Steven Ehrlich and Lu Ma of NSLS-II for their help and collaboration in the synchrotron experiments.

Keywords

CO oxidation
atomically dispersed catalyst
cerium
cerium oxide
efficient use of metal

Access to Document

10.1021/acsami.3c13708

Cite this

@article{453a71db544845299a4fcd312a23cbe2,

title = "Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation",

abstract = "Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeOx and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.",

keywords = "CO oxidation, atomically dispersed catalyst, cerium, cerium oxide, efficient use of metal",

author = "Ounjit Sodpiban and Tanika Kessaratikoon and Jacob Smith and Guodong Ren and {Del Gobbo}, Silvano and Sonali Das and Miaofang Chi and Valerio D{\textquoteright}Elia and Gates, {Bruce C.}",

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

year = "2023",

month = dec,

day = "6",

doi = "10.1021/acsami.3c13708",

language = "English",

volume = "15",

pages = "55885--55894",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "48",

}

TY - JOUR

T1 - Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation

AU - Sodpiban, Ounjit

AU - Kessaratikoon, Tanika

AU - Smith, Jacob

AU - Ren, Guodong

AU - Del Gobbo, Silvano

AU - Das, Sonali

AU - Chi, Miaofang

AU - D’Elia, Valerio

AU - Gates, Bruce C.

PY - 2023/12/6

Y1 - 2023/12/6

N2 - Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeOx and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.

AB - Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeOx and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.

KW - CO oxidation

KW - atomically dispersed catalyst

KW - cerium

KW - cerium oxide

KW - efficient use of metal

UR - http://www.scopus.com/inward/record.url?scp=85179126785&partnerID=8YFLogxK

U2 - 10.1021/acsami.3c13708

DO - 10.1021/acsami.3c13708

M3 - Article

C2 - 37991323

AN - SCOPUS:85179126785

SN - 1944-8244

VL - 15

SP - 55885

EP - 55894

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 48

ER -

Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this