Facet Engineering of Nanoceria for Enzyme-Mimetic Catalysis

• DOI: 10.1021/acsami.2c04320
• Publication Date: 2022-05-03T18:59:01Z
• Authors: Min Chen; Xiaocheng Zhou; Can Xiong; Tongwei Yuan; Wenyu Wang; Yafei Zhao; Zhenggang Xue; Wenxin Guo; Qiuping Wang; Huijuan Wang; Yafei Li; Huang Zhou; Yuen Wu
• Keywords: Nanomaterials; Facet (psychology); Nanorod; Glucose oxidase; Surface Engineering

Nanomaterials with natural enzyme-mimicking characteristics have aroused extensive attention in various fields owing to their economical price, ease of large-scale production, and environmental resistance. Previous investigations demonstrated that composition, size, shape, surface modification play important roles the enzymelike activity nanomaterials; however, a fundamental understanding crystal facet effect, which determines energy or reactivity, has rarely been reported. Herein, fluorite cubic CeO2 nanocrystals controllably exposed {111}, {100}, {110} facets are fabricated as proof-of-concept candidates study effect on peroxidase-mimetic activity. Both experiments theoretical results show {110}-dominated nanorods (CeO2 NR) possess highest due richest defects surfaces, beneficial capture metal atoms further enrich artificial enzymatic functionality for cascade catalysis. For instance, introduction atomically dispersed Au NR surfaces not only enhances peroxidase but also endows obtained catalyst glucose oxidase (GOx)-mimicking activity, realizes enzyme-free reactions colorimetric detection. This work provides an engineering nanomaterials enhance catalytic opens up new way design biomimetic multiple functions.