Dual-site activation enhanced photocatalytic removal of no with Au/CeO2

Shang, Hai; Huang, S. Y.; Li, Hao; Li, Meiqi; Zhao, Shengxi; Wang, Jiaxian; Ai, Zhihui; Zhang, Lizhi

doi:10.1016/j.cej.2020.124047

Cited by 76 publications

(24 citation statements)

References 41 publications

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“…[ 18 , 41 ] Furthermore, Au/CeO 2 catalysts display a strong surface plasmon resonance, [42] which makes them excellent candidates in photocatalytic applications. [ 43 , 44 , 45 ] Interestingly, we observed that Au/CeO 2 catalysts behave rather similar in reactions with varying reaction gas compositions and thus under different reducing conditions (e. g., low temperature CO oxidation,[ 38 , 46 , 47 ] water gas shift,[ 27 , 28 , 48 ] and during CO 2 reduction to methanol[ 18 , 41 ]). In common, we observed that the activity increases quickly in a short activation phase followed subsequently by a continuous deactivation during reaction on‐stream.…”

Section: Background and Introductionmentioning

confidence: 98%

Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies

et al. 2021

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The discovery of the activity of dispersed gold nanoparticles three decades ago paved the way for a new era in catalysis. The unusual behavior of these catalysts sparked many questions about their working mechanism. In particular, Au/CeO2 proved to be an efficient catalyst in several reactions such as CO oxidation, water gas shift, and CO2 reduction. Here, by employing findings from operando X‐ray absorption spectroscopy at the near and extended Au and Ce LIII energy edges, we focus on the fundamental aspects of highly active Au/CeO2 catalysts, mainly in the CO oxidation for understanding their complex structure‐reactivity relationship. These results were combined with findings from in situ diffuse reflectance FTIR and Raman spectroscopy, highlighting the changes of adlayer and ceria defects. For a comprehensive understanding, the spectroscopic findings will be supplemented by results of the dynamics of O2 activation obtained from Temporal Analysis of Products (TAP). Merging these results illuminates the complex relationship among the oxidation state, size of the Au nanoparticles, the redox properties of CeO2 support, and the dynamics of O2 activation.

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Section: Background and Introductionmentioning

confidence: 98%

Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies

et al. 2021

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“…In the next step, NO can naturally translate into nitrate in the presence of O 2 and H 2 O (reaction 2). 14,40 Furthermore, the structures of the NOR reaction intermediates over the BiVO 4 /rGO composite were optimized, and the reaction Gibbs free energies (Δ G ) of all steps over the BiVO 4 and BiVO 4 /rGO composite were simulated and are presented (Fig. 4b and Table S4, ESI†).…”

mentioning

confidence: 99%

Visible-light-driven photocatalytic N₂ fixation to nitrates by 2D/2D ultrathin BiVO₄ nanosheet/rGO nanocomposites

Shao

Zhang

et al. 2022

Chem. Commun.

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“…To study the effect of defects and Sm doping in CeO 2 nanorods, several characterizations were performed including transient photocurrent responses and electrochemical impedance spectra (ZIS) [ 53 , 54 , 55 ]. Figure 6 a shows the transient photocurrent responses of the four samples.…”

Section: Resultsmentioning

confidence: 99%

Defect Engineering Enhances the Charge Separation of CeO2 Nanorods toward Photocatalytic Methyl Blue Oxidation

et al. 2020

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Defect-rich photocatalytic materials with excellent charge transfer properties are very popular. Herein, Sm-doped CeO2 nanorods were annealed in a N2 atmosphere to obtain the defective Sm-doped CeO2 photocatalysts (Vo–Sm–CeO2). The morphology and structure of Vo–Sm–CeO2 were systematically characterized. The Vo–Sm–CeO2 nanorods demonstrated an excellent photodegradation performance of methyl blue under visible light irradiation compared to CeO2 nanorods and Sm–CeO2. Reactive oxygen species including OH, ·O2−, and h+ were confirmed to play a pivotal role in the removal of pollutants via electron spin resonance spectroscopy. Doping Sm enhances the conductivity of CeO2 nanorods, benefiting photogenerated electrons being removed from the surface reactive sites, resulting in the superior performance.

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Dual-site activation enhanced photocatalytic removal of no with Au/CeO2

Cited by 76 publications

References 41 publications

Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies

Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies

Visible-light-driven photocatalytic N₂ fixation to nitrates by 2D/2D ultrathin BiVO₄ nanosheet/rGO nanocomposites

Defect Engineering Enhances the Charge Separation of CeO2 Nanorods toward Photocatalytic Methyl Blue Oxidation

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Dual-site activation enhanced photocatalytic removal of no with Au/CeO2

Cited by 76 publications

References 41 publications

Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies

Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies

Visible-light-driven photocatalytic N2 fixation to nitrates by 2D/2D ultrathin BiVO4 nanosheet/rGO nanocomposites

Defect Engineering Enhances the Charge Separation of CeO2 Nanorods toward Photocatalytic Methyl Blue Oxidation

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Visible-light-driven photocatalytic N₂ fixation to nitrates by 2D/2D ultrathin BiVO₄ nanosheet/rGO nanocomposites