Publications de Florent Emmanuel Héroguel

Sustainable Materials: Production Methods and End-of-life Strategies

Jeremy Luterbacher, Raymond Gérard Buser, Florent Emmanuel Héroguel, Arpa Ghosh

All three natural polymers of biomass and the monomer platforms derived from them present multiple avenues to develop products from specialty to bulk markets, which could serve as entry points into the industry for bio-based sustainable materials. However, ...

Swiss Chemical Soc2023

An efficient nickel hydrogen oxidation catalyst for hydroxide exchange membrane fuel cells

Andreas Schueler, Jeremy Luterbacher, Xile Hu, Anna Krammer, Florent Emmanuel Héroguel, Weiyan Ni, Liang Yao, Seunghwa Lee

Hydroxide exchange membrane fuel cells are promising as an energy conversion technology, but require platinum group metal electrocatalysts for their application. A Ni-based hydrogen oxidation reaction catalyst is now shown to exhibit unprecedented electroc ...

2022

Increasing the activity of the Cu/CuAl2O4/Al2O3 catalyst for the RWGS through preserving the Cu2+ ions

Jeremy Luterbacher, Oliver Kröcher, Florent Emmanuel Héroguel, Benjamin Pierre Le Monnier, Yuan-Peng Du, Alimohammad Bahmanpour

Cu-Al spinet oxide is a highly active catalyst for CO2 conversion to CO. However, it suffers from low surface area. By depositing a silica layer, we protected the catalyst surface and preserved the Cu2+ ions during the calcination process. These ions form ...

Royal Society of Chemistry2021

Continuous hydrogenolysis of acetal-stabilized lignin in flow

Jeremy Luterbacher, Florent Emmanuel Héroguel, Yuan-Peng Du, Jean Thierry C Behaghel de Bueren, Wu Lan, Songlan Sun

Using acetal-stabilized lignin we performed a truly steady state continuous high-yielding lignin depolymerization (45% monophenolics using Ni/C), which offered a window into challenges and opportunities that will be faced when processing this feedstock. Wi ...

2021

Aldehyde-Assisted Lignocellulose Fractionation Provides Unique Lignin Oligomers for the Design of Tunable Polyurethane Bioresins

Jeremy Luterbacher, Raymond Gérard Buser, Florent Emmanuel Héroguel, Jean Thierry C Behaghel de Bueren, Chloé Wegmann

Thanks to chemical stabilization, aldehyde-assisted fractionation (AAF) of lignocellulosic biomass has recently emerged as a powerful tool for the production of largely uncondensed lignin. Depolymerization of AAF lignin via ether deavage provides aromatic ...

American Chemical Society2020

Aldehyde-Assisted Fractionation Enhances Lignin Valorization in Endocarp Waste Biomass

Jeremy Luterbacher, Raymond Gérard Buser, Florent Emmanuel Héroguel, Jean Thierry C Behaghel de Bueren, Chloé Wegmann, Graham Reid Dick

Endocarp biomass, which forms much of the inedible portion of nuts and stone fruits, is a promising feedstock for aromatic chemical production due to its high lignin content and because it is a food industry waste. Here, we tested the nut shells and fruit ...

2020

Essential role of oxygen vacancies of Cu-Al and Co-Al spinel oxides in their catalytic activity for the reverse water gas shift reaction

Ursula Röthlisberger, Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Pascal Alexander Schouwink, Alimohammad Bahmanpour, Murat Kiliç

CO2 catalytic hydrogenation to CO will likely be an important part of CO2 mitigation and valorization processes. Recently, we have developed materials containing surface-formed Cu-Al spinel that act as active and stable catalysts for this reaction. Here, t ...

2020

Engineering the ZrO2–Pd Interface for Selective CO2 Hydrogenation by Overcoating an Atomically Dispersed Pd Precatalyst

Mounir Driss Mensi, Jeremy Luterbacher, Oliver Kröcher, Florent Emmanuel Héroguel, Yuan-Peng Du, Alimohammad Bahmanpour, Luka Milosevic

Tailoring the interfacial sites between metals and metal oxides can be an essential tool in designing heterogeneous catalysts. These interfacial sites play a vital role in many renewable applications, for instance, catalytic CO2 reduction. Postsynthesis de ...

2020

Post-synthesis deposition of mesoporous niobic acid with improved thermal stability by kinetically controlled sol–gel overcoating

Jeremy Luterbacher, Florent Emmanuel Héroguel, Yuan-Peng Du

Niobia is a well-known solid acid catalyst owing to its intrinsic Brønsted and Lewis acidity. However, catalyst development with this oxide has been limited by our ability to control its pore structure and thermal stability. Here we report a novel post-syn ...

Royal Society of Chemistry2019

Catalyst support and solvent effects during lignin depolymerization and hydrodeoxygenation

Jeremy Luterbacher, Florent Emmanuel Héroguel

We studied and compared the hydrodeoxygenation (HDO) and depolymerization of aldehyde-stabilized lignin and 4-propylguaiacol (PG), a model lignin monomer. We demonstrated by liquid phase adsorption that PG HDO catalyzed by Ru/C can be achieved in isooctane ...

2019

Insights into the Nature of the Active Sites of Tin‐Montmorillonite for the Synthesis of Polyoxymethylene Dimethyl Ethers (OME)

Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour

In this study,we reportthat intercalationof tin into montmor-illoniteclay (Sn-MMT)boostscatalyticactivityfor the synthesisof polyoxymethylenedimethylethers,a promisingdieselfueladditive.This increasein activityis attributedto the formationof a hierarchical ...

Wiley-VCH Verlag2019

Cu–Al Spinel as a Highly Active and Stable Catalyst for the Reverse Water Gas Shift Reaction

Ursula Röthlisberger, Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour, Murat Kiliç

The reverse water gas shift reaction is considered to be a highly attractive catalytic route for CO2 recycling in a future sustainable economy. Copperbased catalysts are commonly used for this reaction due to their high activity and selectivity. However, t ...

2019

Prominent role of mesopore surface area and external acid sites for the synthesis of polyoxymethylene dimethyl ethers (OME) on a hierarchical H-ZSM-5 zeolite

Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour

H-ZSM-5 zeolite has been shown to be an active catalyst for the synthesis of polyoxymethylene dimethyl ethers (OME). However, we demonstrated – by passivation of the zeolite's external surface – that the reaction rate is limited due to severe internal diff ...

2019

Post-synthesis deposition of mesoporous niobic acid with improved thermal stability by kinetically controlled sol-gel overcoating

Jeremy Luterbacher, Florent Emmanuel Héroguel, Yuan-Peng Du

AMER CHEMICAL SOC2019

Slowing the Kinetics of Alumina Sol-Gel Chemistry for Controlled Catalyst Overcoating and Improved Catalyst Stability and Selectivity

Jeremy Luterbacher, Florent Emmanuel Héroguel, Yuan-Peng Du

Catalyst overcoating is an emerging approach to engineer surface functionalities on supported metal catalyst and improve catalyst selectivity and durability. Alumina deposition on high surface area material by sol–gel chemistry is traditionally difficult t ...

2018

Selective synthesis of dimethyl ether on eco-friendly K10 montmorillonite clay

Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour

The methanol dehydration reaction was studied over environmentally benign, easily accessible and inexpensive K10 montmorillonite clay used as the catalyst at a temperature range between 200–700 °C. Nearly 100% selectivity towards dimethyl ether (DME) at 80 ...

2018

Controlled deposition of titanium oxide overcoats by non-hydrolytic sol gel for improved catalyst selectivity and stability

Jeremy Luterbacher, Florent Emmanuel Héroguel, Luca Silvioli, Yuan-Peng Du

Advances in the synthetic control of surface nanostructures could improve the activity, selectivity and stability of heterogeneous catalysts. Here, we present a technique for the controlled deposition of TiO2 overcoats based on non-hydrolytic sol-gel chemi ...

Elsevier2018

Simulation of Gas- and Liquid-Phase Layer-By-Layer Deposition of Metal Oxides by Coarse-Grained Modeling

Jeremy Luterbacher, Florent Emmanuel Héroguel, Benjamin Pierre Le Monnier, Kristopher Brown, Chiara Saggese

Atomic layer deposition (ALD) and chemical layer deposition (CLD) are techniques to produce conformal, atomically precise overcoats for materials in gas and liquid phases, respectively. Although it is a challenge to explicitly model ALD/CLD dynamics becaus ...

2018

Densely Packed, Ultra Small SnO Nanoparticles for Enhanced Activity and Selectivity in Electrochemical CO2 Reduction

Jeremy Luterbacher, Xile Hu, Florent Emmanuel Héroguel, Jun Gu, Jun Gu

Controlling the selectivity in electrochemical CO2 reduction is an unsolved challenge. While tin (Sn) has emerged as a promising non‐precious catalyst for CO2 electroreduction, most Sn‐based catalysts produce formate as the major product, which is less des ...

Wiley-VCH Verlag GmbH2018

Selectivity control during the single-step conversion of aliphatic carboxylic acids to linear olefins

Jeremy Luterbacher, Jher Hau Yeap, Bartosz Rozmyslowicz, Florent Emmanuel Héroguel

We have studied the single-step catalytic conversion of biomass-derived aliphatic carboxylic acids to linear olefins via tandem hydrogenation/dehydration reactions. Hexanoic acid was converted to a mixture of hexenes (92.0% selectivity) over silica–alumina ...

2018