Regional Electron Transfer and Band Regulation by Cluster‐Constrained Nanozyme Growth for Enhanced Catalytic Effect

Abstract

Due to the complexity of their multiple structures, the catalytic mechanism of Prussian blue composite nanozymes (PB C‐NZs) remain to be fully elucidated. Meanwhile, there is currently no relatively clear design concept for the construction of PB C‐NZs. Given that PBNZs have an electron transfer catalytic mechanism and intrinsic properties of redox, this work proposes a novel design concept based on electron transfer and energy band difference to improve catalytic activity and oxidation performance. In short, a PB C‐NZs with region growing is developed by in situ doping with MoO3 to increase the active sites and adjust the band position to regulate redox ability. The energy band overlap region of MoO3 and PB can be used to reduce the band gap for improving the electron transfer efficiency. And its oxidative enzyme‐like performance results show that compounds with higher valence bands can be used to improve the oxidation performance. This confirms that the oxidation enzyme‐like performance of PB C‐NZs are enhanced by energy band differences. The design concept clarifies the factors and electron transfer mechanism of the MoO3/PB nanozyme to enhance enzyme activity and proposes a novel concept for the design of subsequent redox nanozymes.