Search

Solar-driven conversion of CO2to high-value-added chemicals and fuels offers a practical route to alleviate CO2emissions where photodriven catalytic CO2hydrogenation toward lower olefins is a great challenge due to the crucial bottleneck of C–C coupling. Here, we report a K-promoted Ru/Fe3O4catalyst that efficiently drives photothermal catalytic CO2hydrogenation to lower olefins via the Fischer-Tropsch-to-olefin process, where the production rate reaches 0.63 mmol g−1h−1with the highest olefin/paraffin ratio of 10.2. The formation of Ru-FeOxat the interface of Ru nanoparticles and the Fe3O4support plays a decisive role in forming C–C bonds and determining the hydrocarbon products. The photochemical contribution promotes electron transfer at the interface of K-promoted Ru/Fe3O4, significantly enhances the activation and dissociation of CO2, and abruptly inhibits the hydrogenation of olefins. Therefore, the product distribution and selectivity of olefins are distinctly different from those of the thermal catalysis process.