Chromite spinel nanocatalysts: promising photocatalysts for CO pollutant removal from the air

Salehi, Sousan; Niaei, Aligholi; Hosseini, Seyed Abolfazl; Salari, Dariush; Raeisipour, Javad; Seifi, Ali

doi:10.1007/s13204-019-01245-5

Cited by 7 publications

(1 citation statement)

References 57 publications

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“…Also, CO is one of the undesired and deteriorating impurity gases that can poison catalysts used in some technological applications such as polymer electrolyte membrane fuel cells even at trace levels [4]. Therefore, technological approaches have been introduced for the elimination of CO via direct capture using CO fixation materials [5], electrocatalytic oxidation [6], photocatalytic oxidation [7], and thermochemical catalytic oxidation into carbon dioxide (CO 2 ) [8,9]. The thermochemical catalytic oxidation of highly toxic CO into less toxic CO 2 by using a heterogeneous catalyst is an efficient and reliable technique for the continuous removal of CO in the gas phase [10].…”

Section: Introductionmentioning

confidence: 99%

Rational synthesis of gold-ceria catalysts supported on reduced graphene oxide with remarkable activity for CO oxidation

Zedan

Moussa²,

El‐Shall³

2023

Mater. Res. Express

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Gold (Au)- and ceria (CeO2)-based catalysts are amongst the most active catalysts for the gas phase CO oxidation reaction. Nevertheless, nanosized Au and CeO2 catalysts may encounter heat-induced sintering in thermochemical catalytic reactions. Herein, we report on the rational one-pot synthesis of ceria-reduced graphene oxide (CeO2-RGO) using a facile ethylenediamine (EDA)-assisted solvothermal method. Standalone RGO and free-standing CeO2 were also prepared using the same EDA-assisted method for comparison. We then incorporated Au into the prepared samples by colloidal reduction and evaluated the catalytic activity of the different catalysts for CO oxidation. The RGO-supported CeO2 surpassed the free-standing CeO2, exhibiting a 100% CO conversion at 285 oC compared to 340 oC in the case of CeO2. Interestingly, the RGO-supported Au/CeO2 catalysts outperformed the Au/CeO2 catalysts and achieved a 100% CO conversion at 76 oC compared to 113 oC in the case of Au/CeO2. Additionally, the Au/CeO2-RGO catalyst demonstrated remarkable room-temperature activity with simultaneous 72% CO conversion. This outstanding performance was attributed to the unique dispersion and size characteristics of the RGO-supported CeO2 and Au catalysts in the ternary Au/CeO2-RGO nanocomposite, as revealed by TEM and XPS, among other techniques.

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