Nitrogen doping of ceria

A. Belén Jorge; Jordi Fraxedas; Andrés Cantarero; Anthony J. Williams; Jennifer Rodgers; J. Paul Attfield; Amparo Fuertes

doi:10.1021/cm7028678

Nitrogen doping of ceria

A. Belén Jorge, Jordi Fraxedas, Andrés Cantarero, Anthony J. Williams, Jennifer Rodgers, J. Paul Attfield, Amparo Fuertes

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

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Abstract

A study was conducted to show that up to 4.5 mol% nitrogen can be introduced into ceria under reducing conditions between 550 and 900 °C through ammonolysis. Powder samples of CeO2 were treated in flowing NH3at a rate of 270 cm3/min and temperatures between 400 and 1100°C during 17 hour and were subsequently quenched to room temperature in the ammonia atmosphere. The Ce ions content show that cerium is reduced from above 650°C but the amount of ions increase significantly above 750°C. All of the CeO2 samples obtained up to 780°C are found to contain a single cubic phase by power X-ray Diffraction analysis. The 400.1 eV of binding energy corresponds to molecularly chemisorbed nitrogen at the ceria surface, while 397.4 eV contribution is assigned to the formation of Ce-N bonds.

Original language	English
Pages (from-to)	1682-1684
Journal	Chemistry of Materials
Volume	20
Issue number	5
DOIs	https://doi.org/10.1021/cm7028678
Publication status	Published - 11 Mar 2008

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@article{32b1ebbe2ee54914859f089060968390,

title = "Nitrogen doping of ceria",

abstract = "A study was conducted to show that up to 4.5 mol% nitrogen can be introduced into ceria under reducing conditions between 550 and 900 °C through ammonolysis. Powder samples of CeO2 were treated in flowing NH3at a rate of 270 cm3/min and temperatures between 400 and 1100°C during 17 hour and were subsequently quenched to room temperature in the ammonia atmosphere. The Ce ions content show that cerium is reduced from above 650°C but the amount of ions increase significantly above 750°C. All of the CeO2 samples obtained up to 780°C are found to contain a single cubic phase by power X-ray Diffraction analysis. The 400.1 eV of binding energy corresponds to molecularly chemisorbed nitrogen at the ceria surface, while 397.4 eV contribution is assigned to the formation of Ce-N bonds.",

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doi = "10.1021/cm7028678",

language = "English",

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TY - JOUR

T1 - Nitrogen doping of ceria

AU - Jorge, A. Belén

AU - Fraxedas, Jordi

AU - Cantarero, Andrés

AU - Williams, Anthony J.

AU - Rodgers, Jennifer

AU - Attfield, J. Paul

AU - Fuertes, Amparo

PY - 2008/3/11

Y1 - 2008/3/11

N2 - A study was conducted to show that up to 4.5 mol% nitrogen can be introduced into ceria under reducing conditions between 550 and 900 °C through ammonolysis. Powder samples of CeO2 were treated in flowing NH3at a rate of 270 cm3/min and temperatures between 400 and 1100°C during 17 hour and were subsequently quenched to room temperature in the ammonia atmosphere. The Ce ions content show that cerium is reduced from above 650°C but the amount of ions increase significantly above 750°C. All of the CeO2 samples obtained up to 780°C are found to contain a single cubic phase by power X-ray Diffraction analysis. The 400.1 eV of binding energy corresponds to molecularly chemisorbed nitrogen at the ceria surface, while 397.4 eV contribution is assigned to the formation of Ce-N bonds.

AB - A study was conducted to show that up to 4.5 mol% nitrogen can be introduced into ceria under reducing conditions between 550 and 900 °C through ammonolysis. Powder samples of CeO2 were treated in flowing NH3at a rate of 270 cm3/min and temperatures between 400 and 1100°C during 17 hour and were subsequently quenched to room temperature in the ammonia atmosphere. The Ce ions content show that cerium is reduced from above 650°C but the amount of ions increase significantly above 750°C. All of the CeO2 samples obtained up to 780°C are found to contain a single cubic phase by power X-ray Diffraction analysis. The 400.1 eV of binding energy corresponds to molecularly chemisorbed nitrogen at the ceria surface, while 397.4 eV contribution is assigned to the formation of Ce-N bonds.

U2 - 10.1021/cm7028678

DO - 10.1021/cm7028678

M3 - Article

VL - 20

SP - 1682

EP - 1684

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 5

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