A Simple and Efficient Hydrogen Production-Storage Hybrid Material System (Co/TiO2) for Synchronizing Hydrogen Photogeneration with Uptake
The production and storage of hydrogen are the two most critical challenges for hydrogen energy’s development. In addition, the process from its as-obtained gas state to stable storage state consumes an excess energy and increases the practice cost of hydrogen. Based on the above consideration, we now present a simple hybrid material system (Co/TiO2), which efficiently synchronizes hydrogen photogeneration in water with its storage at room temperature. In the composite, through a serial of carefully controlled experiments, ultrathin Co shell composed of 1, 2, 4 and 9 atom layers have been fabricated on TiO2 photocatalysts, respectively. It is found that before the saturation of hydrogen in metal Co, the hydrogen storage efficiency is almost as high as 100%, which means that nearly all hydrogen generated in the photocatalytic water splitting is conserved. This work provides a new idea for structure-function combining design technology in hydrogen energy field.