Abstract

Lithium iron phosphate materials as one of the most representative cathode materials for lithium-ion battery were found to possess intrinsic peroxidase-like activity. LiFePO₄ particles were synthesized by a classic hydrothermal process. In this paper, colorless 3,3',5,5'-tetramethylbenzidine is oxidized to a blue product using hydrothermally synthesized LiFePO₄ particles (LFP) as a catalyst with a significant absorption peak at 650 nm. Kinetic assay showed that the catalytic performance was consistent with typical Michaelis–Menten kinetics. As a novel peroxidase mimic material, LFP show the advantages of high catalytic efficiency and favorable stability in aqueous solution compared with natural enzymes, thus providing a simple, inexpensive and fast approach to colorimetric detection of H₂O₂ and glucose.

中文翻译：

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水热磷酸铁锂作为模拟过氧化物酶的人工酶及其在葡萄糖检测中的应用

摘要

磷酸铁锂材料作为最具代表性的锂离子电池正极材料之一，被发现具有固有的类过氧化物酶活性。LiFePO ₄颗粒是通过经典的水热工艺合成的。在本文中，无色 3,3',5,5'-四甲基联苯胺被使用水热合成的 LiFePO ₄颗粒（LFP) 作为催化剂，在 650 nm 处有明显的吸收峰。动力学分析表明催化性能与典型的 Michaelis-Menten 动力学一致。作为一种新型的过氧化物酶模拟材料，与天然酶相比，LFP 具有催化效率高和水溶液稳定性好的优点，从而为 H ₂ O ₂和葡萄糖的比色检测提供了一种简单、廉价和快速的方法。