Understanding of Au-CeO2 interface and its role in catalytic oxidation of formaldehyde

Bu, Yibin; Chen, Yafeng; Jiang, Guiming; Hou, Xinmei; Li, Shun; Zhang, Zuotai

doi:10.1016/j.apcatb.2019.118138

Cited by 99 publications

(53 citation statements)

References 77 publications

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“…For all three supports, the intense peaks located at 463 cm −1 are associated with the first-order vibrational mode with F 2g symmetry in a cubic fluorite-type structure. 28 The weak bands at 262 and 1174 cm −1 correspond to the second-order transverse acoustic (2TA) mode and longitudinal optical (2LO) mode, respectively. Moreover, the weak peak at 598 cm −1 belongs to the defect-induced (D) mode on the CeO 2 surface.…”

Section: Resultsmentioning

confidence: 99%

“…The high I D / I F 2g ratio of Au/R-CeO 2 demonstrates the strong interactions between Au and R-CeO 2 . 28,32…”

Section: Resultsmentioning

confidence: 99%

“…Another peak above 532.0 eV is ascribed to other weakly bound oxygen species (O γ ), such as carbonate, molecular water, and hydroxyl. 25,26,28 The percentages of O β (C O β ) are calculated by O β /(O α + O γ + O β ) × 100% based on their peak areas, which are shown in Table 1. These values stand for the content of surface oxygen vacancies, which decline in the order of R-CeO 2 (25.6%), C-CeO 2 (21.5%), and O-CeO 2 (17.2%).…”

Section: Resultsmentioning

confidence: 99%

“…Au nanoparticles were loaded onto CeO 2 by the deposition–precipitation method. 28 Typically, 2.1 mL of 10 mg mL −1 HAuCl 4 ·4H 2 O solution was added into 20 mL of deionized water, and the pH value was adjusted to 10 with NaOH solution (0.2 M). The solution was added to a suspension containing CeO 2 (190 mg) in deionized water (25 mL), and then the pH was adjusted to 10 again.…”

Section: Methodsmentioning

confidence: 99%

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Effect of CeO₂ morphology on the catalytic properties of Au/CeO₂ for base-free glucose oxidation

Yao

et al. 2022

Catal. Sci. Technol.

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Section: Resultsmentioning

confidence: 99%

“…The high I D / I F 2g ratio of Au/R-CeO 2 demonstrates the strong interactions between Au and R-CeO 2 . 28,32…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of CeO₂ morphology on the catalytic properties of Au/CeO₂ for base-free glucose oxidation

Yao

et al. 2022

Catal. Sci. Technol.

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“…Resulting loosely bonded surface lattice oxygen and easy formed anion vacancies have been proposed as sites of oxygen adsorption and activation, favoring the oxygen supply in VOCs oxidation [10]. The promoted reactivity by Ce-O bonds weakening and easy oxygen vacancies formation can be also related to the ability of the formed oxygen vacancies to affect the binding energy between the catalysts and the reactant molecules lowering the energy barrier for their activation [42] and references therein.…”

Section: Discussionmentioning

confidence: 99%

Complete Benzene Oxidation over Mono and Bimetallic Pd—Au Catalysts on Alumina-Supported Y-Doped Ceria

et al. 2020

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The protection of environment and human health stimulates intensive research for abatement of volatile organic compounds (VOCs) in the atmosphere. Complete catalytic oxidation is an efficient, environmentally friendly and economically feasible method for elimination of VOCs. This study aims to design high performing and cost-effective catalytic formulations by exploration of appropriate and economically viable supports. Alumina-supported ceria (30 wt.%) and Y2O3 (1 wt.%)-doped ceria were prepared by mechanical mixing and were used as support of mono Au (2 wt.%) and Pd (1 wt.%) and bimetallic Pd-Au catalysts. The characterization by textural measurements, X-ray powder diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), EPR (electron paramagnetic resonance) and temperature-programmed reduction (TPR) was carried out in order to clarify the relationship between catalyst composition, textural, structural and surface properties, reducibility and catalytic performance for complete benzene oxidation. Among all studied catalysts, Pd-based catalysts exhibited the best combustion activity. In particular, monometallic Pd on alumina supported Y-doped ceria attained 100% of complete benzene conversion at 180 °C. These catalytic materials have potential to meet stringent emission regulations in an economical and effective way.

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Synergy between Platinum and Gold Nanoparticles in Oxygen Activation for Enhanced Room‐Temperature Formaldehyde Oxidation

Zhu

Jiang

et al. 2021

Adv Funct Materials

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Room-temperature oxidation over supported noble metals provides a feasible approach to eliminating formaldehyde (HCHO) from indoor air. Oxygen activation by noble metals such as gold and platinum plays a key role in achieving complete HCHO oxidation, but it is unclear how different noble metals function synergistically toward oxygen activation. Here, the synergistic mechanisms of Pt and Au nanoparticles (NPs) coloaded on TiO 2 in catalytic HCHO oxidation are elucidated. Strikingly, ≈0.08% doping of Pt can dramatically improve the catalytic activity of 0.9% Au/TiO 2 . The surface oxygen species of TiO 2 jointly activated by Au and Pt NPs can rapidly transform HCHO to dioxymethylene surface species, while negatively charged Pt NPs can efficiently adsorb and activate molecular oxygen to oxidize the dioxymethylene into formate, which is further completely oxidized. This synergy enables efficient HCHO oxidation at surface sites between adjacent Pt and Au NPs.

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Understanding of Au-CeO2 interface and its role in catalytic oxidation of formaldehyde

Cited by 99 publications

References 77 publications

Effect of CeO₂ morphology on the catalytic properties of Au/CeO₂ for base-free glucose oxidation

Effect of CeO₂ morphology on the catalytic properties of Au/CeO₂ for base-free glucose oxidation

Complete Benzene Oxidation over Mono and Bimetallic Pd—Au Catalysts on Alumina-Supported Y-Doped Ceria

Synergy between Platinum and Gold Nanoparticles in Oxygen Activation for Enhanced Room‐Temperature Formaldehyde Oxidation

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Understanding of Au-CeO2 interface and its role in catalytic oxidation of formaldehyde

Cited by 99 publications

References 77 publications

Effect of CeO2 morphology on the catalytic properties of Au/CeO2 for base-free glucose oxidation

Effect of CeO2 morphology on the catalytic properties of Au/CeO2 for base-free glucose oxidation

Complete Benzene Oxidation over Mono and Bimetallic Pd—Au Catalysts on Alumina-Supported Y-Doped Ceria

Synergy between Platinum and Gold Nanoparticles in Oxygen Activation for Enhanced Room‐Temperature Formaldehyde Oxidation

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Effect of CeO₂ morphology on the catalytic properties of Au/CeO₂ for base-free glucose oxidation

Effect of CeO₂ morphology on the catalytic properties of Au/CeO₂ for base-free glucose oxidation