Electrocatalytic Hydrogenation of Furfural with Improved Activity and Selectivity at the Surface of Structured Copper Electrodes

20 November 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Furfural is a pivotal renewable platform molecule obtained from the chemical breakdown of cellulose. While it has traditionally been valorized to value-added chemicals through catalytic hydrogenation in biorefineries, its direct electrocatalytic hydrogenation presents attractive advantages. This article describes the significant improvements brought by the structuring of copper cathodes applied to this process, in terms of activity and selectivity. We show that structured electrodes are capable of converting furfural to furfuryl alcohol with 100% selectivity at potentials as high as - 0.2 vs. the reversible hydrogen electrode (RHE) in neutral conditions (pH 7.0). Moreover, the same electrode can selectively generate either furfuryl alcohol or 2-methylfuran in acidic conditions (pH 1.0), depending on applied potential and temperature. We further show the existence of optimal voltage-temperature conditions for the efficient conversion of furfural to furfuryl alcohol or 2-methylfuran, highlighting the delicate influence of operating conditions on the selectivity of furfural reduction, in competition with the hydrogen evolution reaction in aqueous electrolytes. These performances are attributed to the resilience of Cu (I) species under operating conditions and their likely contribution to the electrocatalytic active site, as revealed by quasi-in-situ photoelectron spectroscopy.


Electrocatalytic hydrogenation
Furfuryl alcohol
High-pressure photoemission

Supplementary materials

Electrocatalytic Hydrogenation of Furfural with Improved Activity and Selectivity at the Surface of Structured Copper Electrodes - Supplementary Information
A PDF containing illustrations of the methods employed in the study, additional SEM data, additional cyclic voltammetry data, complementary activity and selectivity data obtained on structured Cu and Cu foil, activation energy measurements and details on the detection and quantification of dissolved products by HPLC and NMR.


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