Catalytic conversion of CO₂ into methanol is of particular interest as it does not only provide valuable methanol, but also utilize the waste CO₂. In the present work, a CoO/Co/TiO₂ catalyst was developed and utilized in catalyzing CO₂ to methanol under photothermal conditions. From the results of characterization, the supported Co nanoparticles (NPs) were composed of Co⁰ in the bulk, CoO film formed from air oxidation on the surface, and Co⁰ at Co NPs-TiO₂ interfaces. This structure provided the possibility for a Z scheme photothermal catalytic system, which revealed a high activity for methanol formation in aqueous media under atmosphere pressure. It was proposed that the light excited electrons from the valence band (VB) of TiO₂, and the excited electrons could enhance the Co⁰ catalytic activity under thermal conditions. The present approach will offer a new strategy to design Co based Z scheme catalysts and further improve the conversion efficiency from CO₂ to fuels.

将CO ₂催化转化为甲醇特别重要，因为它不仅提供了有价值的甲醇，而且还利用了废弃的CO ₂。在目前的工作中，开发了CoO / Co / TiO ₂催化剂并将其用于在光热条件下将CO ₂催化成甲醇。从表征结果来看，负载的Co纳米颗粒（NPs）由本体Co ⁰，表面空气氧化形成的CoO膜和Co NPs-TiO _2的Co ^0组成。接口。这种结构为Z方案光热催化体系提供了可能性，该体系显示了在大气压下在水性介质中甲醇形成的高活性。提出了来自TiO ₂价带（VB）的光激发电子，并且该激发电子可以提高热条件下的Co ⁰催化活性。本方法将提供设计基于Co的Z方案催化剂的新策略，并进一步提高从CO ₂到燃料的转化效率。