Zhang, Ziyang published the artcileTi3+ Tuning the Ratio of Cu+/Cu0 in the Ultrafine Cu Nanoparticles for Boosting the Hydrogenation Reaction, SDS of cas: 627-93-0, the publication is Small (2021), 17(23), 2008052, database is CAplus and MEDLINE.
Hydrogenation of diesters to diols is a vital process for chem. industry. The inexpensive Cu+/Cu0-based catalysts are highly active for the hydrogenation of esters, however, how to efficiently tune the ratio of Cu+/Cu0 and stabilize the Cu+ is a great challenge. In this work, it is demonstrated that doped Ti ions can tune the ratio of Cu+/Cu0 and stabilize the Cu+ by the Ti-O-Cu bonds in Ti-doped SiO2 supported Cu nanoparticle (Cu/Ti-SiO2) catalysts for the high conversion of di-Me adipate to 1,6-hexanediol. In the synthesis of the catalysts, the Ti4+-O-Cu2+ bonds promote the reduction of Cu2+ to Cu+ by forming Ti3+-OV-Cu+ (OV: oxygen vacancy) bonds and the amount of Ti doping can tune the ratio of Cu+/Cu0. In the catalytic reaction, the O vacancy activates C-O in the ester by forming new Ti3+δ-OR-Cu1+δ bonds (OR: reactant oxygen), and Cu0 activates hydrogen. After the products are desorbed, the Ti3+δ-OR-Cu1+δ bonds return to the initial state of Ti3+$-OV-Cu+ bonds. The reversible Ti-O-Cu bonds greatly improve the activity and stability of the Cu/Ti-SiO2 catalysts. When the content of Ti is controlled at 0.4 wt%, the conversion and selectivity can reach 100% and 98.8%, resp., and remain stable for 260 h without performance degradation
Small published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C9H9ClN2, SDS of cas: 627-93-0.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics