On the solution combustion synthesis of copper based nanocatalysts for steam methanol reforming: Effect of precursor, ultrasound irradiation and urea/nitrate ratio

Ajamein, Hossein; Shokrani, Reza; Abdollahifar, Mozaffar

doi:10.1016/j.molcata.2016.05.028

Cited by 46 publications

(18 citation statements)

References 63 publications

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“…The formation of intermediate species in the methanol steam reforming reaction can be initiated by the presence of Lewis acid sites on the surface . Thus, methanol interacts with oxygen anions which are located in metallic oxides, promoting the reaction, as stated in various mechanisms proposed by several authors . So, in this case, the presence of Lewis acidity can favour the reaction.…”

Section: Resultsmentioning

confidence: 96%

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

et al. 2017

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In this work five CuO‐ZnO‐Al2O3 catalysts were synthesized using the sol‐gel method, with different Cu percentages, for use in the methanol steam reforming reaction, at 300 °C, aiming to generate hydrogen for PEM (Polymer Electrolyte Membrane) fuel cells. The specific area and total pore volume of the materials decreased with increasing Cu content and consequently reduced the alumina content. Also, the area decreased with increasing the calcination temperature, due to the sintering and coalescence of Cu crystals. The metal dispersion decreased (from 32 to 4 %) with increasing the Cu amount (from 8.9 to 48.4 %). For this reaction, the catalyst with the second highest Cu concentration (40.6 %) was the most active and had the higher Cu area (34.8 m2Cu/gcat). Meanwhile, the catalyst with the lowest Cu content (8.9 %) had its active sites better used, presenting the highest turnover frequency, specific area, and metal dispersion. The experimental results indicated that there was an optimum composition for the catalyst, which would provide the best area and dispersion for the reaction, with a view to industrial application. This composition was statistically calculated to be 33 % (g/g) of Cu.

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Section: Resultsmentioning

confidence: 96%

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

et al. 2017

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“…Copper-based nanocatalysts have received considerable attention because of their high activity and low reaction temperature [116]. The activity of the Cu-based nanocatalyst can be influenced by synthetic protocol, composition, temperature, pressure, concentration, and reactor type [117]. Various methods are available in the literature to synthesize Cu-based nanocatalysts such as hydrothermal [118], coprecipitation [119], homogenous precipitation [120], and impregnation [121].…”

Section: Copper-based Nanocatalystsmentioning

confidence: 99%

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Hussain

Kamal

Hossain

2019

Journal of Nanomaterials

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Nanocatalysis is an emerging field of research and is applicable to nearly all kinds of catalytic organic conversions. Nanotechnology is playing an important role in both industrial applications and academic research. The catalytic activities become pronounced as the size of the catalyst reduces and the surface area-to-volume ratio increases which ultimately enhance the activity and selectivity of nanocatalysts. Similarly, the morphology of the particles also has a great impact on the activity and selectivity of nanocatalysts. Moreover, the electronic properties and geometric structure of nanocatalysts can be affected by polar and nonpolar solvents. Various forms of nanocatalysts have been reported including supported nanocatalysts, Schiff-based nanocatalysts, graphene-based nanocatalysts, thin-film nanocatalysts, mixed metal oxide nanocatalysts, magnetic nanocatalysts, and core-shell nanocatalysts. Among a variety of different rare earth and transition metals, palladium-based nanocatalysts have been extensively studied both in academia and in the industry because of their applications such as in carbon-carbon cross-coupling reactions, carbon-carbon homocoupling reactions, carbon-heteroatom cross-coupling reactions, and C-H activation, hydrogenation, esterification, oxidation, and reduction. The current review highlights the recent developments in the synthesis of palladium and some other metal nanocatalysts and their potential applications in various organic reactions.

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“…In addition, alumina addition to the CuO/ZnO catalyst resulted in higher methanol conversion as well as lower CO selectivity. Their catalytic properties were enhanced by ultrasonic mixing of primary combustion gel as it led in higher dispersion of active phases, decreased the particles size, and enhanced their homogeneity, while higher conversion of methanol was achieved by utilizing ultrasound irradiation …”

Section: Hydrogen Production Processesmentioning

confidence: 99%

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

et al. 2018

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Solution combustion synthesis (SCS) is a relatively new method for synthesizing catalytic materials with many distinct advantages: simplicity of method, short reaction times, and the capability to regulate crystal lattice parameters and thereby the activity and selectivity of catalysts. Over the last years, SCS has been used for the production and study of a multitude of new catalytic materials. This review considers and discusses the recent developments and trends in SCS of nanocatalysts, while special attention is paid to the development and applications of nanostructured catalysts.

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On the solution combustion synthesis of copper based nanocatalysts for steam methanol reforming: Effect of precursor, ultrasound irradiation and urea/nitrate ratio

Cited by 46 publications

References 63 publications

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

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On the solution combustion synthesis of copper based nanocatalysts for steam methanol reforming: Effect of precursor, ultrasound irradiation and urea/nitrate ratio

Cited by 46 publications

References 63 publications

Utilization of sol‐gel CuO‐ZnO‐Al2O3 catalysts in the methanol steam reforming for hydrogen production

Utilization of sol‐gel CuO‐ZnO‐Al2O3 catalysts in the methanol steam reforming for hydrogen production

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

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Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production