Carbon-Based Electron Buffer Layer on ZnOx-Fe5C2-Fe3O4 Boosts Ethanol Synthesis from CO2 Hydrogenation

Angew Chem Int Ed Engl. 2023 Sep 21:e202311786. doi: 10.1002/anie.202311786. Online ahead of print.ABSTRACTThe conversion of CO2 into ethanol with renewable H2 has attracted tremendous attention due to its integrated functions of carbon elimination and chemical synthesis, but still being challenging. The electronic property of catalyst is essential to determine the adsorption strength and configuration of the key intermediates, therefore altering the reaction network for targeted synthesis. Here, a carbon buffer layer is employed to tailor the electronic property of the ternary ZnOx-Fe5C2-Fe3O4, in which the electron transfer pathway (ZnOx → Fe species or carbon layer) ensures the appropriate adsorption strength of -CO* on catalytic interface, facilitating the C-C coupling between -CHx* and -CO* for ethanol synthesis. Benefiting from this unique electron transfer buffering effect, extremely high ethanol yield of 366.6 gEtOH kgcat-1 h-1 (with CO of 10 vol% co-feeding) is achieved from CO2 hydrogenation. This work provides a powerful electronic modulation strategy for catalyst design in terms of highly oriented synthesis.PMID:37735097 | DOI:10.1002/anie.202311786

Source: Angewandte Chemie - September 21, 2023 Category: Chemistry Authors: Yang Wang Wenhang Wang Ruosong He Meng Li Jinqiang Zhang Fengliang Cao Jianxin Liu Shiyuan Lin Xinhua Gao Guohui Yang Mingqing Wang Tao Xing Tao Liu Qiang Liu Han Hu Noritatsu Tsubaki Mingbo Wu Source Type: research