industrial reaction used in the synthesis of bulk and fine chemicals. Most current processes are performed by making use of either stoichiometric amounts of toxic oxidizing agents or the use of pressurized dioxygen. Here, we describe an alternative dehydrogenative pathway effected by water and base with the concomitant generation of hydrogen gas. A homogeneous ruthenium complex catalyses the transformation
Homogeneous Reforming of Aqueous Ethylene Glycol to Glycolic Acid and Pure Hydrogen Catalyzed by Pincer‐Ruthenium Complexes Capable of Metal–Ligand Cooperation
作者:You‐Quan Zou、Niklas Wolff、Michael Rauch、Moran Feller、Quan‐Quan Zhou、Aviel Anaby、Yael Diskin‐Posner、Linda J. W. Shimon、Liat Avram、Yehoshoa Ben‐David、David Milstein
DOI:10.1002/chem.202005450
日期:2021.3.8
useful and important α‐hydroxy acid that has broad applications. Herein, the homogeneous ruthenium catalyzed reforming of aqueous ethylene glycol to generate glycolic acid as well as pure hydrogen gas, without concomitant CO2 emission, is reported. This approach provides a clean and sustainable direction to glycolic acid and hydrogen, based on inexpensive, readily available, and renewable ethylene glycol
An efficient system catalyzed by a Ru-PNN pincer complex was developed for reforming methanol to H-2 and CO2 (absorbed by base) under relatively low temperature (around 100 degrees C), and good yields of H-2 were obtained (similar to 80%). The catalyst solution can be reused without isolation and purification, with no decrease in catalytic activity being observed for a period of similar to 1 month. Decomposition of formic acid, which is likely to be the last step of the methanol reforming reaction, was also investigated, and the formic acid adduct of the catalyst was fully characterized spectroscopically and by X-ray crystallography.