Hydrogen sensing using gold nanoclusters supported on tungsten trioxide thin films

Ahmad, Muhammad Zamharir; Golovko, Vladimir B.; Adnan, Rohul H.; Bakar, Faridah Abu; Ruzicka, Jan-Yves; Anderson, David P.; Andersson, Gunther G.; Włodarski, W.

doi:10.1016/j.ijhydene.2013.07.089

Cited by 18 publications

(12 citation statements)

References 70 publications

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“…21 Therefore, methods for the fabrication of gold cluster-based catalysts resilient to aggregation are in high demand in nanomaterials, 22 catalysis 4,16,23,24 and sensing communities. 25,26 It has been shown that the successful deposition of AuNCs on surfaces depends on various factors, such as the type of support and ligand, synthetic conditions and cluster-support interactions. 9 Therefore, understanding these factors is crucial in the design of deposition method.…”

Section: Introductionmentioning

confidence: 99%

Au₁₀₁–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Au₁₀₁–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

et al. 2021

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“…These results led to concluding that the sensitivity of CO oxidation catalysts to pretreatments depends on the strength of the interaction of Ag species with supports. The combination of these methods can be used not only for detection and characterization of subnanometer metallic species in catalysts, but also for other materials used in various fields, such as sensors [56].…”

Section: Resultsmentioning

confidence: 99%

Identification of Subnanometric Ag Species, Their Interaction with Supports and Role in Catalytic CO Oxidation

et al. 2016

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Abstract:The nature and size of the real active species of nanoparticulated metal supported catalysts is still an unresolved question. The technique of choice to measure particle sizes at the nanoscale, HRTEM, has a practical limit of 1 nm. This work is aimed to identify the catalytic role of subnanometer species and methods to detect and characterize them. In this frame, we investigated the sensitivity to redox pretreatments of Ag/Fe/TiO 2 , Ag/Mg/TiO 2 and Ag/Ce/TiO 2 catalysts in CO oxidation. The joint application of HRTEM, SR-XRD, DRS, XPS, EXAFS and XANES methods indicated that most of the silver in all samples is in the form of Ag species with size <1 nm. The differences in catalytic properties and sensitivity to pretreatments, observed for the studied Ag catalysts, could not be explained taking into account only the Ag particles whose size distribution is measured by HRTEM, but may be explained by the presence of the subnanometer Ag species, undetectable by HRTEM, and their interaction with supports. This result highlights their role as active species and the need to take them into account to understand integrally the catalysis by supported nanometals.

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“…Also their nanosilver wool captures the natural antimicrobial properties of silver and the product is used in antimicrobial textiles. Following on from this, they used a similar approach to prepare nanopalladium–wool fiber composites by functionalizing merino and crossbred wool fibers, respectively, with palladium nanoparticles and characterizing the composite materials produced [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly Palladium on Wool Nanocatalysts for Cyclohexene Hydrogenation

2018

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Use of natural wool fiber supports in the fabrication of novel composite materials incorporating metal nanoparticles, which offer the possibility of “environmentally friendly” catalytic materials, has been investigated. The catalytic hydrogenation of cyclohexene to cyclohexane by palladium nanoparticles immobilized on wool (Pd/wool) was studied using moderate pressure of pure hydrogen gas. The performance of wool-supported catalysts was explored over a palladium nanoparticle loading ranging from 1.6 to 2.6 wt %. The effect of the catalytic testing conditions, including stirring rate, amount of reactants, gas pressure, and target temperature were explored. A systematic series of catalytic-activity tests carried out at 400 psi H2 for 5 and 24 h reaction times at 40 °C using a stirring rate 750 rpm allowed us to identify differences in performance within the series of Pd/wool nanocatalysts studied. The most catalytically active samples contained Pd nanoparticles with average sizes of ca. 5 nm located predominantly on the surface and within the topmost layer of wool fibers, making them more accessible to the reactants.

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Hydrogen sensing using gold nanoclusters supported on tungsten trioxide thin films

Cited by 18 publications

References 70 publications

Au₁₀₁–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

Au₁₀₁–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

Identification of Subnanometric Ag Species, Their Interaction with Supports and Role in Catalytic CO Oxidation

Ecofriendly Palladium on Wool Nanocatalysts for Cyclohexene Hydrogenation

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Hydrogen sensing using gold nanoclusters supported on tungsten trioxide thin films

Cited by 18 publications

References 70 publications

Au101–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

Au101–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

Identification of Subnanometric Ag Species, Their Interaction with Supports and Role in Catalytic CO Oxidation

Ecofriendly Palladium on Wool Nanocatalysts for Cyclohexene Hydrogenation

Contact Info

Product

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About

Au₁₀₁–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation

Au₁₀₁–rGO nanocomposite: immobilization of phosphine-protected gold nanoclusters on reduced graphene oxide without aggregation