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عنوان فارسی مقاله:
کاتالیزور پوشش دو فلزی با انتخاب بالا و واکنش برای هیدروژناسیون فورفورال
عنوان انگلیسی مقاله:
Bimetallic overlayer catalysts with high selectivity and reactivity for furfural hydrogenation
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
[PDF]Bimetallic overlayer catalysts with high selectivity and reactivity for ... iranarze.ir/wp-content/uploads/2016/11/E2865.pdf Oct 24, 2016 - binding strength of both overlayer catalysts compared to pure Pt, ... Bimetallic overlayer catalysts with a pseudomorphic metal overlayer. Use of Hydrogen Chemisorption and Ethylene Hydrogenation as ... pubs.acs.org/doi/pdf/10.1021/acs.energyfuels.6b01405 by Q Lai - 2016 - Related articles A pseudomorphic overlayer bimetallic catalyst is a specific type of bimetallic catalyst ... Therefore, Co@Pt and Ni@Pt bimetallic overlayer catalysts with reduced ... [PDF]Tailoring the reactivity of bimetallic overlayer and surface ... - Uni Ulm https://www.uni-ulm.de/fileadmin/website_uni_ulm/nawi.../JPhysCondMat_AG.pdf by A Groß - Cited by 44 - Related articles The activity of bimetallic catalysts is often discussed using the concepts of the ensemble and the ligand ef- fect [3, 12]. The term ensemble effect refers to those. Overlayer Bimetallic Catalysts or Particle Size Effects? A Comparison ... link.springer.com/10.1007/s10562-013-1052-0 by MD Skoglund - 2013 - Cited by 10 - Related articles Jul 2, 2013 - Alumina supported Re@Pd bimetallic overlayer catalysts of different loading, dispersion, and particle size were synthesized using the directed ... Abstract: Overlayer Catalyst for Hydrodeoxygenation of Lignin-Derived ... https://aiche.confex.com/aiche/2016/webprogram/Paper468386.html by Q Lai - Related articles Nov 14, 2016 - Based on previous work, the pseudomorphic overlayer bimetallic catalysts with a monatomic layer atop a different bulk metal would also ... Metal overlayer on metal carbide substrate: unique bimetallic ... pubs.rsc.org/en/content/articlehtml/2012/cs/c2cs35165j by TG Kelly - 2012 - Cited by 70 - Related articles Jul 18, 2012 - A promising alternative to replace Pt in these bimetallic catalysts are .... For UHV surface science experiments, metal overlayers are typically ...
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کلمات کلیدی:
The growing demand for energy resources has stimulated extensive research on converting biomass into transportation fuels and valuable chemicals to alleviate the excessive consumption of fossil fuels. Derived from non-edible lignocellulosic biomass, furfural is currently considered as one of the most important biomass-derived chemicals that are available in large volume and high versatility [1,2]. Hydrogenation of furfural using heterogeneous catalysts has been widely studied as an important transformation of furfural into value-added products [2]. Furfuryl alcohol is the most common hydrogenation product of furfural, with 62% of furfural produced being transformed into furfuryl alcohol [3]. Furfuryl alcohol has been found to be useful in the manufacture of many products [3,4], including resins, anti-corrosion plastics, and membranes. Bimetallic overlayer catalysts with a pseudomorphic metal overlayer atop a different bulk metal have been shown to possess unique properties. Computational studies have predicted that the overlayer catalysts would exhibit decreased d-band center energy and thereby reduced H2 adsorption strength [5,6]. Previous fuel cell and aqueous phase reforming studies proposed that strongly adsorbed H2 or CO would block Pt active sites and inhibit Pt reactivity [7,8]. It is therefore hypothesized that Pt catalytic reactivity will be improved if the adsorption strength of H2 and CO on Pt is decreased. Such proposal was corroborated by previous glycerol hydrodeoxygenation study, as the Pt overlayer atop Ni, Co or Ir showed higher hydrocarbon production reactivity compared to pure Pt [9,10]. This enhancement was ascribed to the weaker adsorption strength of overlaying Pt compared to pure Pt, releasing Pt active sites from strongly adsorbed H2 or CO, and increasing reactivity of Pt in reactions where an excessive amount of H2 (or CO) was present. It was also reported that in furfural hydrogenation, intermediate hydrogen coverage on Pd(111) surface is likely to exhibit a lower energy barrier compared to higher hydrogen coverage, and typical reactor operations tend to induce high hydrogen coverage [11]. Accordingly, it is proposed that Pt reactivity of furfural hydrogenation could also be improved compared to pure Pt if H2 adsorption strength is decreased. Herein silica-supported Ni@Pt and Cu@Pt (core@shell) overlayer catalysts were synthesized to investigate the effect of reduced H2 adsorption strength of overlayer catalysts on furfural hydrogenation reactivity
