CO2還元によるHCHO合成に関する華中科技大学との共同研究の成果がApplied Catalysis B誌 (Elsevier)にAcceptされました。Our collaboration with Huazhong University of Science and Technology in Applied Catalysis B (Elsevier).

Various value-added chemicals such as formic acid, carbon monoxide, methane, methanol, have been obtained using CO₂ as a feedstock. However, formaldehyde generation from CO₂ is less reported. Here, we performed CO₂ hydrogenation with H₂ in additive-free water and used layered double hydroxide supported Ru as the heterogeneous catalyst. It was found that gaseous CO₂ and H₂ could be efficiently and selectively converted to formaldehyde dissolved in water even at room temperature with ambient pressure. The highest gaseous CO₂ conversion of 89.7% and a formaldehyde yield of 58.7% were achieved using a Ru/LDH-red catalyst in water at 30 °C with 10 bar CO₂ and 10 bar H₂. Combined with experimental and theoretical studies, HCOOH was found as the important reaction intermediate. The rich surface -OH of LDH and hybrid electronic state of Ru over Ru/LDH-red catalyst resulted in highly efficient HCHO formation. Our findings offer opportunities to one energy-efficient formaldehyde synthesis method.