Studies on the Morphology Effect on Catalytic Ability of a Single MnO2 Catalyst Particle with a Solid Nanopipette,ACS Sensors

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Studies on the Morphology Effect on Catalytic Ability of a Single MnO2 Catalyst Particle with a Solid Nanopipette
ACS Sensors ( IF 8.2 ) Pub Date : 2022-01-10 , DOI: 10.1021/acssensors.1c02729
Rui Zhang ₁ , Xuye Liu ₂ , Qiang Zeng ₁ , Huanhuan Shen ₁ , Lishi Wang ₁

Affiliation

Investigating the catalytic ability of an individual catalyst particle helps to understand heterogeneity and can provide new insights into the synthesis of high-efficiency catalysts. Solid-state nanopores have become a promising tool for detecting single molecules/particles due to their high temporal and spatial resolution. Here, we report a nanopore-based strategy for the evaluation and comparison of a single MnO₂ catalyst particle with different morphologies by monitoring the generated O₂ bubbles from the catalytic decomposition of H₂O₂. The finite element simulation was introduced to account for the flow velocity and bubble-induced current variation in the nanopore. In particular, the differences in catalytic ability of spherical and cubic MnO₂ have been studied by calculating the production rate and volume of O₂. It demonstrates that the shape of a single MnO₂ catalyst particle has a significant effect on its catalytic activity indeed.

中文翻译：

用固体纳米移液管研究单一 MnO2 催化剂颗粒的形态对催化能力的影响

研究单个催化剂颗粒的催化能力有助于了解异质性，并可以为高效催化剂的合成提供新的见解。由于其高时间和空间分辨率，固态纳米孔已成为检测单个分子/颗粒的有前途的工具。在这里，我们报告了一种基于纳米孔的策略，用于通过监测H ₂ O ₂催化分解产生的 O ₂气泡来评估和比较具有不同形态的单个 MnO _{2催化剂颗粒。}. 引入有限元模拟来解释纳米孔中的流速和气泡引起的电流变化。特别是，通过计算O ₂的产率和体积，研究了球形和立方MnO ₂催化能力的差异。这表明单个MnO ₂催化剂颗粒的形状确实对其催化活性有显着影响。

更新日期：2022-01-28

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