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Unraveling Ce detection at the surface of ceria nanopowders by UPS analysis
A sequential analysis using Ultra-violet Photoelectron Spectroscopy (UPS) and X-ray Photoelectron Spectroscopy (XPS) on ceria nanopowders has been implemented to identify the influence of the X-ray beam on the surface of this oxide. For the first time, UPS analysis evidenced the photoreductive effec...
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| Published in: | Physical chemistry chemical physics : PCCP 2022-09, Vol.24 (37), p.22815-22822 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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| container_end_page | 22822 |
| container_issue | 37 |
| container_start_page | 22815 |
| container_title | Physical chemistry chemical physics : PCCP |
| container_volume | 24 |
| creator | Cardenas, Luis Molinet-Chinaglia, Clément Loridant, Stéphane |
| description | A sequential analysis using Ultra-violet Photoelectron Spectroscopy (UPS) and X-ray Photoelectron Spectroscopy (XPS) on ceria nanopowders has been implemented to identify the influence of the X-ray beam on the surface of this oxide. For the first time, UPS analysis evidenced the photoreductive effect of XPS analysis on ceria after an oxidative
in situ
pretreatment, leading to an overestimation of the Ce
3+
/Ce
4+
ratio obtained by XPS. Based on this spectroscopy methodology, UPS imposes itself as a leading technique for analyzing powders with minimal impact on the authentic chemical state, thus paving the way for identifying the real ratio of Ce
4+
and Ce
3+
of ceria after oxidative and reductive
in situ
treatments.
A novel and controlled methodology combining UPS/XPS spectroscopies intended to determine the electronic state at the surface of ceria nanopowders. |
| doi_str_mv | 10.1039/d2cp02736d |
| format | article |
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in situ
pretreatment, leading to an overestimation of the Ce
3+
/Ce
4+
ratio obtained by XPS. Based on this spectroscopy methodology, UPS imposes itself as a leading technique for analyzing powders with minimal impact on the authentic chemical state, thus paving the way for identifying the real ratio of Ce
4+
and Ce
3+
of ceria after oxidative and reductive
in situ
treatments.
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in situ
pretreatment, leading to an overestimation of the Ce
3+
/Ce
4+
ratio obtained by XPS. Based on this spectroscopy methodology, UPS imposes itself as a leading technique for analyzing powders with minimal impact on the authentic chemical state, thus paving the way for identifying the real ratio of Ce
4+
and Ce
3+
of ceria after oxidative and reductive
in situ
treatments.
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in situ
pretreatment, leading to an overestimation of the Ce
3+
/Ce
4+
ratio obtained by XPS. Based on this spectroscopy methodology, UPS imposes itself as a leading technique for analyzing powders with minimal impact on the authentic chemical state, thus paving the way for identifying the real ratio of Ce
4+
and Ce
3+
of ceria after oxidative and reductive
in situ
treatments.
A novel and controlled methodology combining UPS/XPS spectroscopies intended to determine the electronic state at the surface of ceria nanopowders.</abstract><doi>10.1039/d2cp02736d</doi><tpages>8</tpages></addata></record> |
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| identifier | ISSN: 1463-9076 |
| ispartof | Physical chemistry chemical physics : PCCP, 2022-09, Vol.24 (37), p.22815-22822 |
| issn | 1463-9076 1463-9084 |
| language | eng |
| recordid | cdi_rsc_primary_d2cp02736d |
| source | Royal Society of Chemistry Journals |
| title | Unraveling Ce detection at the surface of ceria nanopowders by UPS analysis |
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