FeNi nanoparticles with carbon armor as sustainable hydrogenation catalysts: towards biorefineries

Abstract

Carbon supported FeNi nanoparticles were prepared by carbothermal reduction of cellulose filter paper impregnated with Fe and Ni salts. The resulting carbon enwrapped alloy nanoparticles were employed as an efficient catalyst for the continuous hydrogenation of molecules obtainable from different fractions of lignocellulosic biomass. Scaleup and time on stream tests over 80 hours proved the catalyst stable and durable of over a wide range of conditions.

Efficient Water Splitting Using a Simple Ni/N/C Paper Electrocatalyst

“…As described by Chieffi et al (impressively supported by a high temperature TEM video) the origin of this morphology is the movement of metal nanoparticles dissolving their path through the amorphous carbon scaffold going along with leaving the partially graphitized coil structures. [ 27 ] In this manuscript we focus on a phenanthroline/NiAc 2 weight ratio of 1:1 at a carbonization temperature of 800 °C, because this material (Ni@NC) showed by far the best electrochemical results (for comparison refer to Figure S4, Supporting Information). Raman spectroscopy was used to get information on the chemical composition of the catalyst ( Figure S5, Supporting Information).…”

“…Furthermore, the metals can trigger the graphitization of the carbon matrix at the nanometer scale, possibly resulting in the formation of a graphene-shell, which can encapsulate and stabilize the nanoparticles. [ 27 ] To evaluate the fi nal composition of the catalyst thermogravimetric analysis (TGA) and combustion elemental analysis (EA) were carried out. The thermogram (in O 2 ) suggests a nickel content of 7.62 wt% (see Figure S1, Supporting Information).…”

Hydrogenation Properties of Nanostructured Tungsten Carbide Catalysts in a Continuous‐Flow Reactor

“…In this case, reactions were performed in very acidic media, which suggests a limited applicability of the method. Recently, however, interest in WC as a catalyst has returned since the need for sustainable catalysts as alternatives for traditional precious‐metal‐based systems has increased . For instance, recent research has uncovered the hidden potential of nanostructured WC as a hydrodeoxygenation catalyst and as a support for Ni particles in biorefinery .…”

Continuous Reductive Amination of Biomass‐Derived Molecules over Carbonized Filter Paper‐Supported FeNi Alloy

“…[3] Alternatively,t he use of ac obalt-based catalysth as been reported. [16] FeNi catalysts are expected to follow the conventionalm echanisticp icture in whicht he metal coordinates the unsaturated substrate, facilitates the dissociation of hydrogen, and finally delivers hydride speciest ot he substrate. [14] Interestingly,F eNi alloys have provent ob ec onvenient catalysts for hydrogenation.…”