Cobalt-Sputtered Anodic Aluminum Oxide Membrane for Efficient Photothermal CO2 Hydrogenation

The rational design of nanoarray-structured catalysts is an accessible way to increase light absorption ability and boost photothermal CO2 conversion efficiency. However, practical application of current nanoarrays is hindered by complex synthesis procedures, high costs, and low catalyst yields. Herein, we report a simple, robust method to prepare efficient photothermal catalyst by sputtering Co nanoparticles on commercial anodic aluminum oxide (AAO) membrane. The detailed study shows that gas diffusion and catalytic activity can be affected by AAO structures, such as channel size and shape. The optimized Co@dpAAO catalyst reached a record Co-based photothermal CO2 conversion rate of 1666 mmol . g(Co)(-1) . h(-1). This study not only provides a facile way to synthesize efficient catalysts, but also promotes the understanding of constructing nanoarray-based photothermal catalysts.

Automated summary

The rational design of nanoarray-structured catalysts can enhance light absorption ability and photothermal CO2 conversion efficiency. A simple and robust method to prepare efficient photothermal catalyst by sputtering Co nanoparticles on AAO membrane was reported, reaching a record Co-based photothermal CO2 conversion rate. This study not only provides a facile way to synthesize efficient catalysts, but also contributes to the understanding of nanoarray-based photothermal catalysts construction.