Enhancement of the Photocatalytic Oxygen Production by Tantalum Nitride Supported Fe Atom Embedded N‐Doped Graphene Oxide†

Comprehensive Summary Energy crises and environmental pollution have become urgent problems with human civilization development. Photocatalysis technology is a green method to deal with these challenges. The key to improve photocatalytic efficiency lies in the effective separation of photogenerated electron–hole pairs. In this work, we designed the Fe atom embedded N‐doped graphene oxide (Fe‐NGO) supporting on tantalum nitride (Ta 3 N 5 ) catalyst, which was employed to improve the photocatalytic oxygen production activity. The oxygen production of 5 wt% Fe atom embedded N‐doped graphene oxide supporting on tantalum nitride (Fe‐NGO/Ta 3 N 5 ) was 184.7 μmol·g −1 , about 3.5 times higher than that of the pure Ta 3 N 5 . The introduction of the cocatalyst Fe‐NGO acting as an electron conductor in the Fe‐NGO/Ta 3 N 5 accelerates the carrier migration of Ta 3 N 5 and further enhances the photocatalytic oxygen production activity. N‐doping increases the conductivity of graphene oxide (GO), and Fe atoms are used as the reactive sites to promote the combination of electron and sacrificial agent in the system. This work may provide insights into the research of new carbon cocatalyst materials.