title: Development of a stable MnCo2O4 cocatalyst for photocatalytic CO2 reduction with visible light.
abstract: The synthesis of uniform MnCo2O4 microspheres and their cooperation with a visible light harvester to achieve efficient photocatalytic CO2 reduction under ambient conditions are reported here. The MnCo2O4 materials were prepared by a facile two-step solvothermal-calcination method and were characterized by XRD, SEM, TEM, EDX, XPS, elemental mapping, and N2 adsorption measurements. By using the MnCo2O4 microspheres as a heterogeneous cocatalyst, the photocatalytic performance of the CO2-to-CO conversion catalysis was remarkably enhanced, and no decrease in the promotional effect of the cocatalyst was observed after repeatedly operating the reaction for six cycles. (13)CO2 isotope tracer experiments verified that the CO product originated from the CO2 reactant. The effect of synthetic conditions and various reaction parameters on the photocatalytic activity of the system were investigated and optimized. The stability of the MnCo2O4 cocatalyst in the CO2 reduction system was confirmed by several techniques. Moreover, a possible mechanism for MnCo2O4-cocatalyzed CO2 photoreduction catalysis is proposed.
authors: State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University , Fuzhou 350002, P. R. China.
authors: Sibo
authors: S
authors: Wang
authors: Yidong
authors: Y
authors: Hou
authors: Xinchen
authors: X
authors: Wang
keywords: CO2 reduction; MnCo2O4 microspheres; artificial photosynthesis; cooperative catalysis; heterogeneous photocatalysis; ternary metal oxide