Monometallic and bimetallic catalysts based on Pd, Cu and Ni for hydrogen transfer deoxygenation of a prototypical fatty acid to diesel range hydrocarbons

Abstract

Georgios (2019) 'Monometallic and bimetallic catalysts based on Pd, Cu and Ni for hydrogen transfer deoxygenation of a prototypical fatty acid to diesel range hydrocarbons.', Catalysis today. . Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractBimetallic PdxNi(100-x) and PdxCu(100-x) structures of a wide compositional range supported on activated carbon were synthesised via a simple, cheap and commercially relevant method. The surface and bulk properties of both the bimetallic structures and their monometallic counterparts were determined via STEM-EDS, TEM, XPS, powder XRD, N2 porosimetry and ICP-OES. A close correlation between the XRD patterns and EDS elemental composition mapping of individual metal particles established the extent of palladium-base metal interaction in each sample. The performance of the different structures as catalysts for the selective hydrogenation and hydrodeoxygenation of oleic acid, a prototypical fatty acid, was evaluated using tetralin as a hydrogen donor. Catalysts displaying true bimetallic/alloy formation were found to improve the conversion of tetralin as compared to catalysts in which compositional segregation was observed. The PdxNi(100-x) series was found to outperform the PdxCu(100-x) catalysts in terms of hydrogen production via the dehydrogenation of tetralin, mirroring the fact that compositional segregation occurs more for the PdxCu(100-x) series than PdxNi(100-x). The hydrogen transfer deoxygenation of oleic acid over the monometallic and bimetallic catalysts was found to mirror the availability of hydrogen with those catalysts liberating more hydrogen also favouring the formation of C17 and C18 alkanes.

The effect of metal precursor on copper phase dispersion and nanoparticle formation for the catalytic transformations of furfural

“…It is also reported that sulphided sites in sulphided NiMo based catalysts can promote hydrogen transfer for hydrogenation reactions [30] in conjunction with aldol condensation reactions [31,32] during the hydrotreatment of aldehydes. However, these sulphided catalysts can suffer from leaching, leading to a decline in activity and sulphur contamination of the products [33]. But how sulphur interacts with a copper surface and its influence on catalytic hydrogenation reactions is not yet fully understood.…”

Hydrogen donation of bio-acids over transition metal facets: A density functional theory study

“…Commonly reported alternative hydrogen donors include primary and secondary alcohols such as methanol, ethanol and isopropyl alcohol (IPA), carboxylic acids including acetic acid (AcOH) and formic acid (FA), and aromatic hydrocarbons (AHs) including tetralin and decalin [4,5]. These hydrogen-rich compounds can supply hydrogen for the HDO reaction through self-decomposition or dehydrogenation [1].…”

Green synthesis of graphene oxide (GO)-anchored Pd/Cu bimetallic nanoparticles usingOcimum sanctumas bio-reductant: an efficient heterogeneous catalyst for the Sonogashira cross-coupling reaction

“…The bimetallic alloy nanoparticles comprising a noble metal with an additional cheaper (rst-row transition) metal such as iron, cobalt, nickel and copper is an effective and low cost suitable alternative showing synergistic catalytic effects between the two distinct metals thereby decreasing the precious metal loading. 2,18 Despite a number of reports on bimetallic nanoparticles, palladium (with high surface-to-volume ratio, highly active surfaces, unique size, shape-dependent optoelectronic and anti-cancer properties) 19 and copper (super strong materials, with antibacterial, antifungal, sensing capacity, interaction with other nanoparticles due to the high surface area-volume ratio) 20,21 bimetallic nanoparticles have received signicant attention in the eld of catalysis. There are several methods for the synthesis of metal nanoparticles using toxic and expensive chemicals.…”