Reversible MnO to Mn3O4 Oxidation in Manganese Oxide Nanoparticles,Small

当前位置： X-MOL 学术 › Small › 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.)

Reversible MnO to Mn3O4 Oxidation in Manganese Oxide Nanoparticles
Small ( IF 13.0 ) Pub Date : 2023-10-19 , DOI: 10.1002/smll.202304925
Roos M de Boer ₁ , Marijn A van Huis _{1,

2} , Rafael G Mendes _{1,

2}

Affiliation

Manganese is an attractive element for sustainable solutions. It is largely available in the earth's crust, making it ideal for cost-effective and large-scale applications. Especially MnO nanoparticles have recently received attention for applications in battery technology. However, manganese has many oxidation states that are energetically very similar, indicating that they may easily transform from one to the other. Herein, the reversible oxidation of MnO nanoparticles to Mn₃O₄ studied with in situ transmission electron microscopy is shown. The oxygen sublattices of MnO and Mn₃O₄ are found to be perfectly aligned, and an atomic mechanism where the transformation is facilitated by the migration of Mn cations on the shared O sublattice is proposed. Even when protected with an amorphous carbon layer, MnO particles are highly unstable and oxidize to Mn₃O₄ in ethanol. The poor stability of MnO lacks discussion in many battery-related works, and strategies aimed at avoiding this should be developed.

中文翻译：

氧化锰纳米粒子中 MnO 到 Mn3O4 的可逆氧化

锰是可持续解决方案中极具吸引力的元素。它主要存在于地壳中，使其成为具有成本效益的大规模应用的理想选择。尤其是MnO纳米粒子最近在电池技术中的应用受到关注。然而，锰具有许多能量上非常相似的氧化态，这表明它们很容易从一种氧化态转变为另一种氧化态。在此，显示了用原位透射电子显微镜研究的MnO纳米粒子可逆氧化成Mn ₃ O ₄的过程。 MnO 和 Mn ₃ O ₄的氧亚晶格被发现完美排列，并提出了一种通过共享 O 亚晶格上 Mn 阳离子的迁移来促进转变的原子机制。即使用无定形碳层保护，MnO 颗粒也高度不稳定并在乙醇中氧化成Mn ₃ O ₄ 。 MnO 的稳定性差在许多电池相关工作中缺乏讨论，应该制定旨在避免这种情况的策略。

更新日期：2023-10-19

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11