Towards maximizing the In2O3/m-ZrO2 interfaces for CO2-to-methanol hydrogenation.

Through chelating-assisted impregnation with diethylenetriamine-pentaacetic acid (DTPA), we developed an efficient and durable CO2 hydrogenation catalyst, In15/m-ZrO2-DTPA, featuring improved In2O3 reducibility and interfacial Zr-O-In structures. Benefiting from its distinct CO2 activation and hydrogenation ability, In15/m-ZrO2-DTPA exhibited remarkable CO2-to-methanol catalytic activity, achieving up to 91% selectivity at 260 °C and 5.0 MPa, with consistent conversion maintained over 400 hours.

Oxygen vacancy promoted carbon dioxide activation over Cu/ZrO2 for CO2-to-methanol conversion.

Oxygen vacancy-enriched ultrafine tetragonal ZrO2 was introduced as a support for copper nanoparticles to enhance the energy efficiency of CO2 hydrogenation for methanol synthesis. In situ spectroscopic techniques confirmed the oxygen vacancy-mediated single-electron CO2 activation. The resulting highly efficient catalyst yielded a methanol production rate of 550 mg gcat-1 h-1 at 200 °C, outperforming state-of-the-art Cu-based catalysts.

Tandem catalytic methylation of naphthalene using CO2 and H2.

We report here the direct methylation of naphthalene using CO2 and H2, which is distinctly more effective than the counterpart methylation with methanol. Benefiting from well-balanced specific rates for CO2-to-methanol conversion over ZnZrOx and the subsequent methylation over H-Beta, significantly enhanced selectivity (93.7%) to monomethylnaphthalenes was achieved.