Measuring the redox activity of individual catalytic nanoparticles in cerium-based oxides

Ruigang Wang; Peter Crozier; Renu Sharma; James Adams

doi:10.1021/nl073135c

Measuring the redox activity of individual catalytic nanoparticles in cerium-based oxides

Ruigang Wang, Peter Crozier, Renu Sharma, James Adams

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

75 Scopus citations

Abstract

We have followed the dynamic redox process taking place in individual ceria zirconia nanoparticles with changes in the oxygen chemical potential using an in situ environmental transmission electron microscopy (ETEM). We observe considerable variability in the redox activity and have been able to correlate these differences with nanoscale structural and compositional measurements. We find that the more active structure has predominantly disordered cations and shows no evidence for oxygen vacancy ordering during reduction.

Original language	English (US)
Pages (from-to)	962-967
Number of pages	6
Journal	Nano Letters
Volume	8
Issue number	3
DOIs	https://doi.org/10.1021/nl073135c
State	Published - Mar 1 2008

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl073135c

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abstract = "We have followed the dynamic redox process taking place in individual ceria zirconia nanoparticles with changes in the oxygen chemical potential using an in situ environmental transmission electron microscopy (ETEM). We observe considerable variability in the redox activity and have been able to correlate these differences with nanoscale structural and compositional measurements. We find that the more active structure has predominantly disordered cations and shows no evidence for oxygen vacancy ordering during reduction.",

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N2 - We have followed the dynamic redox process taking place in individual ceria zirconia nanoparticles with changes in the oxygen chemical potential using an in situ environmental transmission electron microscopy (ETEM). We observe considerable variability in the redox activity and have been able to correlate these differences with nanoscale structural and compositional measurements. We find that the more active structure has predominantly disordered cations and shows no evidence for oxygen vacancy ordering during reduction.

AB - We have followed the dynamic redox process taking place in individual ceria zirconia nanoparticles with changes in the oxygen chemical potential using an in situ environmental transmission electron microscopy (ETEM). We observe considerable variability in the redox activity and have been able to correlate these differences with nanoscale structural and compositional measurements. We find that the more active structure has predominantly disordered cations and shows no evidence for oxygen vacancy ordering during reduction.

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Measuring the redox activity of individual catalytic nanoparticles in cerium-based oxides

Abstract

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