Tailored Dynamic Seesaw Configuration of Heterojunctions to Enhance Piezo-Photocatalytic Overall Nitrogen Fixation
Qin Luo, Xiaoxu Deng, Tianxiang Zhao, Shuang‐Feng Yin, Peng Chen
Abstract
Relay overall nitrogen fixation presents an intriguing approach to the simultaneous production of nitric acid and ammonia. However, it remains a significant challenge due to manipulating dual active sites on both temporal and spatial mesoscopic scales. In this study, we propose a bionic seesaw Bi 4 O 5 Cl 2 −Bi 4 O 5 Br 2 heterojunction, which establishes a one-way reaction channel through the entanglement effect, challenging the inherent idea of synchronous reaction in a heterojunction. Notably, the adaptive interface functions as a fulcrum by incorporating both tensile Bi−Cl bonds and compressive Bi−Br bonds while also inducing the localized surface lattice distortion of Bi−O to sequentially activate the active sites. Therefore, unsaturated sites and dynamic properties trigger the seesaw structure to enhance both charge exchange and molecular polarization of N 2 during reduction, thereby creating a hydroxy-rich environment for the ammonia oxidation process. Our work offers a novel active site control perspective and clarifies nitrogen fixation processes.