Ru Nanoclusters on MnO2 Nanotubes for Boosting Electrochemical Nonenzymatic H2O2 Sensing,ACS Applied Nano Materials

当前位置： X-MOL 学术 › ACS Appl. Nano Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ru Nanoclusters on MnO2 Nanotubes for Boosting Electrochemical Nonenzymatic H2O2 Sensing
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-11-14 , DOI: 10.1021/acsanm.3c04081
Ziyin Yang ₁ , Zhigao Tian ₁ , Chengcheng Qi ₁

Affiliation

The development of a high-performance electrocatalyst is the key to the construction of highly sensitive electrochemical sensing methods. In this work, we design Ru nanoclusters supported on MnO₂ nanotubes (c-Ru/MnO₂) as an electrocatalyst for boosting electrochemical nonenzymatic hydrogen peroxide (H₂O₂) sensing. c-Ru/MnO₂ is synthesized based on a facile hydrothermal method, followed by cation exchange and calcination. The obtained c-Ru/MnO₂ nanocomposite is characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electrochemical methods. Electrochemical studies and theoretical calculations reveal that the anchoring of Ru nanoclusters not only makes MnO₂ nanotubes exhibit higher electrochemical surface area and faster electron transfer rate but also promotes the strong adsorption of H₂O₂ and optimizes the interactions with the key intermediates OOH*/OO*. Thanks to the synergistic effect between Ru nanoclusters and MnO₂ nanotubes, the sensor based on c-Ru/MnO₂ exhibits a low anode peak potential of 0.42 V and an extremely high sensitivity of 2967.9 μA mM^–1 cm^–2 toward H₂O₂. Therefore, c-Ru/MnO₂ is demonstrated to be an advanced electrocatalyst for sensitive electrochemical sensing of H₂O₂.

中文翻译：

MnO2 纳米管上的 Ru 纳米团簇可增强电化学非酶 H2O2 传感

高性能电催化剂的开发是构建高灵敏度电化学传感方法的关键。在这项工作中，我们设计了负载在MnO ₂纳米管（c-Ru/MnO ₂）上的Ru纳米团簇作为电催化剂，用于增强电化学非酶过氧化氢（H ₂ O ₂）传感。c-Ru/MnO ₂基于简单的水热法合成，然后进行阳离子交换和煅烧。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高角度环形暗场扫描透射电子显微镜(HAADF-STEM)、X射线衍射(XRD)对所得c-Ru/MnO 2 纳米复合材料进行表征_。、X射线光电子能谱（XPS）和电化学方法。电化学研究和理论计算表明，Ru纳米团簇的锚定不仅使MnO _{2纳米管表现出更高的电化学表面积和更快的电子转移速率，而且促进了H}₂ O ₂的强吸附并优化了与关键中间体OOH*/的相互作用。哦*。由于Ru纳米团簇和MnO ₂纳米管之间的协同效应，基于c-Ru/MnO ₂的传感器表现出0.42 V的低阳极峰值电位和对H ₂ O的2967.9 μA mM ^–1 cm ^–2的极高灵敏度₂ . 因此，c-Ru/MnO ₂被证明是一种用于H ₂ O ₂灵敏电化学传感的先进电催化剂。

更新日期：2023-11-14

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南