부산대학교 도서관

The conversion of C[O.sub.2] into fuels and chemicals is an attractive option for mitigating C[O.sub.2] emissions. Controlling the selectivity of this process is beneficial to produce desirable liquid fuels, but C--C coupling is a limiting step in the reaction that requires high pressures. Here, we propose a strategy to favor C--C coupling on a supported Ru/Ti[O.sub.2] catalyst by encapsulating it within the polymer layers of an imine-based porous organic polymer that controls its selectivity. Such polymer confinement modifies the C[O.sub.2] hydrogenation behavior of the Ru surface, significantly enhancing the [C.sub.2+] production turnover frequency by 10-fold. We demonstrate that the polymer layers affect the adsorption of reactants and intermediates while being stable under the demanding reaction conditions. Our findings highlight the promising opportunity of using polymer/metal interfaces for the rational engineering of active sites and as a general tool for controlling selective transformations in supported catalyst systems. C[O.sub.2] hydrogenation | C--C coupling | polymer/metal interface