Effects of precipitate aging time on the cerium-zirconium composite oxides

Zhong, Qiang; Cui, Meisheng; Mei, Yang; Wang, Qi; Wang, Lei; Guo, Ronggui; Long, Zhiqi; Huang, Xiaowei

doi:10.1016/s1002-0721(14)60175-7

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…The ability to take up, release, and conduct oxygen enables most of the mechanisms in ceria-based functional materials. , In particular, mixed oxides of ceria have shown superior properties (mostly by control of the oxygen vacancy concentration and phase stability), and almost all technically used catalysts and cocatalysts are either mixed oxides or doped materials. Mixed oxides with gadolinium and zirconium are the most common (e.g., GDC). , Ceria–zirconia mixed oxides have proven to be versatile oxides for a vast range of catalysts and cocatalysts, often in combination with noble metals.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Growth of Reactive Pyrochlore Nanostructures on Zirconia-Supported Ceria: Implications for Improved Catalytic Behavior

Yeste

Hernández‐Garrido

Kumke

et al. 2022

ACS Appl. Nano Mater.

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The use of a catalyst support for the design of nanoscale heterogeneous catalysts based on cerium oxide offers vast possibilities for future catalyst development, particularly with regard to an increased focus on the use of renewable biogas and an emerging hydrogen economy. In this study, zirconia-supported ceria catalysts were synthesized, activated by using different thermochemical treatments, and characterized by way of temperature-programmed reduction (TPR), oxygen storage capacity, X-ray diffraction, electron microscopy, and luminescence spectroscopy using Eu3+ as a spectroscopic probe. Through reduction–oxidation pretreatment routines, reactive pyrochlore structures were created at temperatures as low as 600 °C and identified through TPR and electron microscopy experiments. A structural relationship and alignment of the crystal planes is revealed in high-resolution scanning transmission electron microscopy experiments through the digital diffraction patterns. Low-temperature pretreatment induces the formation of reactive pyrochlore domains under retention of the surface area of the catalyst system, and no further morphological changes are detected. Furthermore, the formation of pyrochlore domains achieved through severe reduction and mild reoxidation (SRMO) treatments is reversible. Over multiple alternating SRMO and severe reduction and severe reoxidation (SRSO) treatments, europium spectroscopy and TPR results indicate that pyrochlore structures are recreated over consecutive treatments, whenever the mild oxidation step at 500 °C is the last treatment (SRMO, SRMO–SRSO–SRMO, etc.).

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Section: Introductionmentioning

confidence: 99%

Low-Temperature Growth of Reactive Pyrochlore Nanostructures on Zirconia-Supported Ceria: Implications for Improved Catalytic Behavior

Yeste

Hernández‐Garrido

Kumke

et al. 2022

ACS Appl. Nano Mater.

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“…Cui e colaboradores concluíram que o Ce +4 é formado ao longo do tempo de envelhecimento, portanto a quantidade de Zr +4 inserida na estrutura, além de outros parâmetros (área superficial, tamanho do cristalito, morfologia, etc.) estão relacionados com esse período [66].…”

Section: /Grauunclassified

Síntese, caracterização e aplicação do ácido 12-tungstofosfórico suportado em óxido misto de céria-zircônia na conversão de etanol em etileno

Clemente¹

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Agradeço a Deus por me acompanhar nesta jornada, provendo saúde e perseverança para vencer esta etapa da minha vida.À minha orientadora Sílvia Cláudia Loureiro Dias pela amizade construída, por me apoiar e direcionar cientificamente de forma tão gentil no trabalho e se mostrar sempre disposta a conversar e ajudar no que fosse preciso.Ao professor José Alves Dias pelas discussões científicas que tanto me ajudaram e também pela amizade construída.Ao professor Marcello Moreira pela colaboração na ocasião da defesa de projeto de mestrado e da dissertação.Ao professor José Joaquim Linares León pela amizade, participação na banca de defesa de projeto de mestrado e pela contribuição ao trabalho.Ao professor José dos Santos Politi pela colaboração na ocasião da defesa de projeto de mestrado e também como orientador de iniciação científica.À professora Cláudia Cristina Gatto por aceitar o convite para a participação da banca de defesa de dissertação.Ao pesquisador Rudy Crisafulli pela amizade, contribuição ao meu trabalho e participação na banca de defesa de dissertação e ao professor Fábio Moreira pela amizade e momentos de descontração.Agradeço também aos membros do LaBCat pela amizade e momentos de descontração.

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Role of Cerium–Zirconium Ratio and Chemical Surface Property of CeO2–ZrO2 Supported Nickel-Based Catalysts in Dry Reforming Reaction

Phichairatanaphong

Donphai

2023

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Effects of precipitate aging time on the cerium-zirconium composite oxides

Cited by 7 publications

References 15 publications

Low-Temperature Growth of Reactive Pyrochlore Nanostructures on Zirconia-Supported Ceria: Implications for Improved Catalytic Behavior

Low-Temperature Growth of Reactive Pyrochlore Nanostructures on Zirconia-Supported Ceria: Implications for Improved Catalytic Behavior

Síntese, caracterização e aplicação do ácido 12-tungstofosfórico suportado em óxido misto de céria-zircônia na conversão de etanol em etileno

Role of Cerium–Zirconium Ratio and Chemical Surface Property of CeO2–ZrO2 Supported Nickel-Based Catalysts in Dry Reforming Reaction

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