Low temperature total oxidation of toluene by bimetallic Au–Ir catalysts

Torrente‐Murciano, Laura; Solsona, Benjamín; Agouram, Saïd; Sanchis, Rut; López, José Manuel; Garcı́a, Tomás; Zanella, Rodolfo

doi:10.1039/c7cy00635g

Cited by 39 publications

(18 citation statements)

References 27 publications

(38 reference statements)

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“…In recent years, with the progress of industrial development and the increased number of vehicles, the concentration of carbon monoxide (CO) and hydrocarbons (HCs) in ambient air is on the rise, causing the frequent occurrence of photochemical smog pollution in some areas and seriously threatening people's health [1][2][3][4][5][6][7][8][9]. However, controlling CO and HCs exhaust emissions can be an important direction to reducing air pollution.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Peng

et al. 2021

Processes

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Carbon monoxide (CO) and hydrocarbons (HCs) generally have competitive adsorption on the active site of noble-metal nano-catalysts, thus developing an effective way to reduce the passivation of competitive reaction with each other is an urgent problem. In this study, we successfully synthesized transition metal-noble metal (Pt-M) alloys via introducing inexpensive metal elements (M = Ni, Co and Cu) into Pt particles and then deposited on alumina support to form Pt-based catalysts. Subsequently, we choose CO and toluene as polluting gases to evaluate the catalytic activities of Pt-M/Al2O3 catalysts. Introducing inexpensive metal elements (M = Ni, Co, and Cu) significantly changed the physicochemical properties and catalytic activities of these Pt-based catalysts. It can be found that the Pt-Co/Al2O3 catalyst exhibited outstanding catalytic activity for CO and toluene oxidation under mixed gas atmosphere, compared with other Pt-based catalysts, which is due to the higher dispersity, more surface adsorption oxygen, and well redox ability. Surprisingly, H2O could promote the catalytic activities for CO/toluene co-oxidation over the Pt-Co/Al2O3 catalyst. Thus, the present synthetic strategy not only opens an avenue towards the synthesis of noble metal-based catalysts, but also provides an excellent tolerance to H2O in the catalytic process.

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Section: Introductionmentioning

confidence: 99%

Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Peng

et al. 2021

Processes

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“…These observed shifts might be due to the effect of metal (Au and Ag) NPs. 17,18 When metals are deposited on TiO 2 , two effects may occur on the vibrational properties of the TiO 2 . First, the volume contraction might occur within TiO 2 NPs because of the addition of metal (Au and Ag) NPs.…”

Section: Resultsmentioning

confidence: 99%

Ultrasmall Plasmonic Nanoparticles Decorated Hierarchical Mesoporous TiO₂ as an Efficient Photocatalyst for Photocatalytic Degradation of Textile Dyes

et al. 2018

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Hierarchical mesoporous TiO 2 was synthesized via a solvothermal technique. The sonochemical method was adopted to decorate plasmonic nanoparticles (NPs) (Ag, Au) on the pores of mesoporous TiO 2 . The crystallinity, structure, and morphology were determined to understand the physicochemical nature of the nanocomposites. The catalytic efficiency of the plasmonic nanocatalysts was tested for the azo dyes (congo red, methyl orange, acid orange 10, and remazol red) under solar and visible light irradiations. The generation of hydroxyl radicals was also studied using terephthalic acid as a probe molecule. An attempt was made to understand the influence of size, work function and Fermi level of the metal NPs toward the efficiency of the photocatalyst. The efficiency of the nanocomposites was found to be in the order of P25 < mesoporous TiO 2 < mesoporous Ag–TiO 2 < mesoporous Au–TiO 2 nanospheres under both direct solar light and visible light irradiation. The results indicated that the adsorption of dye, anatase phase, and surface plasmon resonance of NPs favored the effective degradation of dyes in aqueous solution. Further, the efficiency of the catalyst was also tested for xanthene (rose bengal), rhodamine (rhodamine B, rhodamine 6G), and thiazine (methylene blue) dyes. Both TiO 2 and NPs (Ag & Au) possess a huge potential as an eco-friendly photocatalyst for wastewater treatment.

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“…The main Ir 4f peak binding energy is consistent with the Ir 4+ oxidation state. [11] However, an increasing secondary peak at higher binding energy is observed as we increase the number of Ir cycles per super cycle. This peak can be assigned to the lower valence Ir 3+ oxidation state.…”

Section: Characterization Of Tio 2 -Iro X Alloy Filmmentioning

confidence: 89%

Atomic Layer Deposited TiO₂–IrO_x Alloy as a Hole Transport Material for Perovskite Solar Cells

Tan

Hendricks

Meng

et al. 2018

Adv Materials Inter

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The hole transport layer (HTL) is one of the key components in planar perovskite solar cells (PSCs). Here, we report a new kind of HTL fabricated using atomic layer deposition (ALD). By alloying TiO 2 with IrO x , we demonstrate that TiO 2 , a well-known electron-selective contact and electron transport layer (ETL) in photovoltaic devices, can behave as an HTL with an appropriately high work function. Perovskite Cs 0.17 FA 0.83 Pb(I 0.83 Br 0.17 ) 3 solar cells including this new hole transport material achieved a power conversion efficiency of 15.8% under AM 1.5G simulated solar irradiation compared to a 14.3% efficiency for otherwise-identical devices incorporating a more standard NiO HTL layer. These results suggest the promise of transition metal oxide alloys synthesized by ALD as hole contact materials for optoelectronic devices, including advanced photovoltaics.

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Low temperature total oxidation of toluene by bimetallic Au–Ir catalysts

Abstract: Intimate contact between gold and iridium nanoparticles supported on TiO2 provides a synergetic effect leading to low temperature VOC oxidation activity.

Cited by 39 publications

References 27 publications

Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Ultrasmall Plasmonic Nanoparticles Decorated Hierarchical Mesoporous TiO₂ as an Efficient Photocatalyst for Photocatalytic Degradation of Textile Dyes

Atomic Layer Deposited TiO₂–IrO_x Alloy as a Hole Transport Material for Perovskite Solar Cells

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Low temperature total oxidation of toluene by bimetallic Au–Ir catalysts

Abstract: Intimate contact between gold and iridium nanoparticles supported on TiO2 provides a synergetic effect leading to low temperature VOC oxidation activity.

Cited by 39 publications

References 27 publications

Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Ultrasmall Plasmonic Nanoparticles Decorated Hierarchical Mesoporous TiO2 as an Efficient Photocatalyst for Photocatalytic Degradation of Textile Dyes

Atomic Layer Deposited TiO2–IrOx Alloy as a Hole Transport Material for Perovskite Solar Cells

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Product

Resources

About

Ultrasmall Plasmonic Nanoparticles Decorated Hierarchical Mesoporous TiO₂ as an Efficient Photocatalyst for Photocatalytic Degradation of Textile Dyes

Atomic Layer Deposited TiO₂–IrO_x Alloy as a Hole Transport Material for Perovskite Solar Cells