The role of Pd–Ga bimetallic particles in the bifunctional mechanism of selective methanol synthesis via CO2 hydrogenation on a Pd/Ga2O3 catalyst

Collins, Sebastián E.; Delgado, Juan J.; Mira, C.; Calvino, José J.; Bernal, S.; Chiavassa, Dante L.; Baltanás, Miguel Angel; Bonivardi, Adrian Lionel

doi:10.1016/j.jcat.2012.05.005

Cited by 140 publications

(78 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Except for Zn, the catalytic functions of the Pd/Al2O3 and Pd/CeO2 catalysts can be greatly modified by the addition of some other metals such as In and Ga due to the formation of Pd-In and Pd-Ga alloys [59][60][61]. Similarly to the Pd/ZnO catalysts, the alloys are responsible for the high CO2 selectivity and the metallic Pd is responsible for CO selectivity.…”

Section: Palladium Based Catalystsmentioning

confidence: 99%

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Shuai

2017

Catalysts

View full text Add to dashboard Cite

Abstract:Methanol steam reforming is a promising technology for producing hydrogen for onboard fuel cell applications. The methanol conversion rate and the contents of hydrogen, carbon monoxide and carbon dioxide in the reformate, significantly depend on the reforming catalyst. Copper-based catalysts and palladium-based catalysts can effectively convert methanol into hydrogen and carbon dioxide. Copper and palladium-based catalysts with different formulations and compositions have been thoroughly investigated in the literature. This work summarized the development of the two groups of catalysts for methanol steam reforming. Interactions between the activity components and the supports as well as the effects of different promoters were discussed. Compositional and morphological characteristics, along with the methanol steam reforming performances of different Cu/ZnO and Pd/ZnO catalysts promoted by Al 2 O 3 , CeO 2 , ZrO 2 or other metal oxides, were reviewed and compared. Moreover, the reaction mechanism of methanol steam reforming over the copper based and palladium based catalysts were discussed.

show abstract

Section: Palladium Based Catalystsmentioning

confidence: 99%

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Shuai

2017

Catalysts

View full text Add to dashboard Cite

show abstract

“…Ga 2 O 3 and In 2 O 3 have been used widely in conventional catalytic reactions, for example, in CO 2 hydrogenation and methanol steam reforming. [15][16][17][18] However, their applications in visible-light-driven H 2 evolution from water splitting are very limited. Ga 2 O 3 has a wide band gap of approximately 4.8 eV and hence can only absorb UV light.…”

Section: Introductionmentioning

confidence: 99%

Cadmium Sulfide Quantum Dots Supported on Gallium and Indium Oxide for Visible‐Light‐Driven Hydrogen Evolution from Water

et al. 2014

View full text Add to dashboard Cite

In this work, CdS quantum dots (QDs) supported on Ga2O3 and In2O3 are applied for visible-light-driven H2 evolution from aqueous solutions that contain lactic acid. With Pt as the cocatalyst, the H2 evolution rates on CdS/Pt/Ga2O3 and CdS/Pt/In2O3 are as high as 995.8 and 1032.2 μmol h(-1), respectively, under visible light (λ>420 nm) with apparent quantum efficiencies of 43.6 and 45.3% obtained at 460 nm, respectively. These are much higher than those on Pt/CdS (108.09 μmol h(-1)), Pt/Ga2O3 (0.12 μmol h(-1)), and Pt/In2O3 (0.05 μmol h(-1)). The photocatalysts have been characterized thoroughly and their band structures and photocurrent responses have been measured. The band alignment between the CdS QDs and In2O3 can lead to interfacial charge separation, which cannot occur between the CdS QDs and Ga2O3. Among the various possible factors that contribute to the high H2 evolution rates on CdS/Pt/oxide, the surface properties of the metal oxides play important roles, which include (i) the anchoring of CdS QDs and Pt nanoparticles for favorable interactions and (ii) the efficient trapping of photogenerated electrons from the CdS QDs because of surface defects (such as oxygen defects) based on photoluminescence and photocurrent studies.

show abstract

“…Collins and co-workers [57] reported that the formation of Pd-Ga bimetallic particles was identified by means of a combination of quasi-in situ transmission electron microscopy techniques and CO adsorption experiments. A progressive change in selectivity during the CO2 reaction with H2, increasing the yield of methanol at the expense of the undesired CO, was observed under typical process conditions.…”

Section: Palladiummentioning

confidence: 99%

Short Review: Mitigation of Current Environmental Concerns from Methanol Synthesis

Young

Lesmana

Dai

et al. 2013

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

Methanol has become a widely used and globally distributed product. Methanol is very important due to the current depletion of fossil fuels. Industrially, methanol produced from the catalytic reaction of synthetic gas composed of hydrogen, carbon monoxide, and carbon dioxide. Methanol production has brought great attention due to carbon dioxide as the main source of greenhouse gas emissions. Combined of reducing CO2 emissions and supplying an alternative fuel source has created the idea of a carbon neutral cycle called “the methanol economy”. The best catalyst for the methanol economy would show a high CO2 conversion and high selectivity for methanol production. This paper investigates research focused on catalyst development for efficient methanol synthesis from hydrogenation of carbon dioxide through added various supports and additives such as silica, zirconium, and palladium. Catalysts that displayed the highest activity included a zirconia and silicon-titanium oxide promoted Cu/Zn/Al2O3 catalyst. Alternative method of catalyst preparation, include the oxalate-gel, solid-state reaction, co-precipitation and combustion method also investigated. © 2013 BCREC UNDIP. All rights reserve

show abstract

The role of Pd–Ga bimetallic particles in the bifunctional mechanism of selective methanol synthesis via CO2 hydrogenation on a Pd/Ga2O3 catalyst

Cited by 140 publications

References 35 publications

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Cadmium Sulfide Quantum Dots Supported on Gallium and Indium Oxide for Visible‐Light‐Driven Hydrogen Evolution from Water

Short Review: Mitigation of Current Environmental Concerns from Methanol Synthesis

Contact Info

Product

Resources

About