Тип публикации: статья из журнала
Год издания: 2024
Идентификатор DOI: 10.1002/cphc.202300900
Аннотация: <jats:p>Studies on the electrochemical hydrogenation (ECH) of levulinic acid (LA) to valeric acid (VA) or γ-valerolactone (GVL) have mainly focused on the electroreduction of LA in acidic aqueous solutions. However, the narrow range of applied potentials has hindered understanding of some mechanistic aspects of LA electrochemical cПоказать полностьюonversion. Earlier, we discovered that employing proton-deficient non-aqueous reaction media provides more comprehensive insights into the mechanism of LA electrochemical reduction. Here, we conducted further investigations into the LA electroreduction process using cyclic voltammetry in various organic solvents on a Pt electrode and on various electrode materials in acetonitrile, both with and without the addition of proton donors. The products of the ECH processes were identified using HPLC. The solvent nature, the presence of proton donors, the electrode material, and the applied potential strongly influence the LA electroreduction process. This study reveals that LA, in the presence proton donors, can undergo electroreduction through different pathways, depending on the difference (ΔE1/2) between the reduction half-wave potential of protons and LA. When the difference is large, the LA reduction is incomplete and the formation of GVL is observed. Under the close reduction potentials of protons and LA, LA can be completely reduced to VA.</jats:p>
Журнал: ChemPhysChem
Выпуск журнала: Т. 25, № 18
Номера страниц: 202300900
ISSN журнала: 14394235
Издатель: Wiley Interscience