<br>NiCo-LDH中空纳米笼析氧反应促进鲁米诺电化学发光,Small

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NiCo-LDH中空纳米笼析氧反应促进鲁米诺电化学发光
Small ( IF 13.0 ) Pub Date : 2023-11-05 , DOI: 10.1002/smll.202306473
Wenjin Liang ₁ , Min Wang ₁ , Chaoyun Ma ₂ , Jiawen Wang ₁ , Chulei Zhao ₁ , Chenglin Hong ₁

Affiliation

传统的鲁米诺共反应电化学发光（ECL）系统由于过氧化氢容易分解以及溶解氧生成活性氧（ROS）效率低等因素而存在稳定性和准确性低的问题。受析氧反应（OER）介导的鲁米诺ECL机制的启发，具有空心结构和缺陷态的镍钴层状双氢氧化物（NiCo-LDH）空心纳米笼被用作共反应促进剂，以增强鲁米诺的ECL发射-H ₂ O系统。由于中空结构和缺陷态，NiCo-LDH中空纳米笼表现出优异的OER催化活性，可以稳定并高效地产生ROS并增强ECL发射。此外，机理探索表明参与鲁米诺-H ₂ O体系共反应的ROS来源于OER反应过程，并且ECL强度与共反应促进剂的OER催化活性呈正相关。。选择具有优异OER催化活性的催化剂是提高ECL排放的关键因素。最后，基于NiCo-LDH空心纳米笼对鲁米诺-H ₂ O ECL系统的促进作用，构建了用于检测和分析甲胎蛋白（AFP）的双模式免疫传感器。

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NiCo-LDH Hollow Nanocage Oxygen Evolution Reaction Promotes Luminol Electrochemiluminescence

Conventional luminol co-reactant electrochemiluminescence (ECL) systems suffer from low stability and accuracy due to factors such as the ease of decomposition of hydrogen peroxide and inefficient generation of reactive oxygen species (ROS) from dissolved oxygen. Inspired by the luminol ECL mechanism mediated by oxygen evolution reaction (OER), the nickel-cobalt layered double hydroxide (NiCo-LDH) hollow nanocages with hollow structure and defect state are used as co-reaction promoters to enhance the ECL emission from the luminol-H₂O system. Thanks to the hollow structure and defect state, NiCo-LDH hollow nanocages show excellent OER catalytic activity, which can stabilize and efficiently produce ROS and enhance the ECL emission. Additionally, mechanistic exploration suggests that the ROS involved in the co-reaction of the luminol-H₂O system are derived from the OER reaction process, and there is a positive correlation between ECL intensity and the OER catalytic activity of the co-reaction promoter. The selection of catalysts with excellent OER catalytic activity is a key factor in improving ECL emission. Finally, a dual-mode immunosensor is constructed for the detection and analysis of alpha-fetoprotein (AFP) based on the promoting effect of NiCo-LDH hollow nanocages on the luminol-H₂O ECL system.

更新日期：2023-11-05

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