In Situ Spectroscopic Characterization and Theoretical Calculations Identify Partially Reduced ZnO1-x/Cu Interfaces for Methanol Synthesis from CO2 was written by Liu, Xinyu;Luo, Jie;Wang, Hengwei;Huang, Li;Wang, Shasha;Li, Shang;Sun, Zhihu;Sun, Fanfei;Jiang, Zheng;Wei, Shiqiang;Li, Wei-Xue;Lu, Junling. And the article was included in Angewandte Chemie, International Edition in 2022.Category: copper-catalyst This article mentions the following:
The active site of the industrial Cu/ZnO/Al2O3 catalyst used in CO2 hydrogenation to methanol has been debated for decades. Grand challenges remain in the characterization of structure, composition, and chem. state, both microscopically and spectroscopically, and complete theor. calculations are limited when it comes to describing the intrinsic activity of the catalyst over the diverse range of structures that emerge under realistic conditions. Here a series of inverse model catalysts of ZnO on copper hydroxide were prepared where the size of ZnO was precisely tuned from atomically dispersed species to nanoparticles using at. layer deposition. ZnO decoration boosted methanol formation to a rate of 877 gMeOH kgcat-1 h-1 with ≈80% selectivity at 493 K. High pressure in situ X-ray absorption spectroscopy demonstrated that the atomically dispersed ZnO species are prone to aggregate at oxygen-deficient ZnO ensembles instead of forming CuZn metal alloys. By modeling various potential active structures, d. functional theory calculations and microkinetic simulations revealed that ZnO/Cu interfaces with oxygen vacancies, rather than stoichiometric interfaces, Cu and CuZn alloys were essential to catalytic activation. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Category: copper-catalyst).
Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Category: copper-catalyst
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”