Rational Construction of a Ni/CoMoO 4 Heterostructure with Strong Ni–O–Co Bonds for Improving Multifunctional Nanozyme Activity

作者：Yang Dang, Guangtu Wang, Gehong Su, Zhiwei Lu, Yanying Wang, Tao Liu, Xiang Pu, Xianxiang Wang, Wu Chun, Chang Song, Qingbiao Zhao, Hanbing Rao, Mengmeng Sun · 发表于：ACS Nano · 年份：2022 · DOI：10.1021/acsnano.1c11012 · 被引用次数：162 · 研究领域：Advanced Nanomaterials in Catalysis、Electrochemical sensors and biosensors、Nanocluster Synthesis and Applications

Due to the lack of a general descriptor to predict the activity of nanomaterials, the current exploration of nanozymes mainly depended on trial-and-error strategies, which hindered the effective design of nanozymes. Here, with the help of a large number of Ni–O–Co bonds at the interface of heterostructures, a prediction descriptor was successfully determined to reveal the double enzyme-like activity mechanisms for Ni/CoMoO 4 . Additionally, DFT calculations revealed that interface engineering could accelerate the catalytic kinetics of the enzyme-like activity. Ni–O–Co bonds were the main active sites for enzyme-like activity. Finally, the colorimetric signal and intelligent biosensor of Ni/CoMoO 4 based on deep learning were used to detect organophosphorus and ziram sensitively. Meanwhile, the in situ FTIR results uncovered the detection mechanism: the target molecules could block Ni–O–Co active sites at the heterostructure interface leading to the signal peak decreasing. This study not only provided a well design strategy for the further development of nanozymes or other advanced catalysts, but it also designed a multifunctional intelligent biosensor platform. Furthermore, it also provided preferable ideas regarding the catalytic mechanism and detection mechanism of heterostructure nanozymes.