A Single-Crystal Open-Capsule Metal–Organic Framework,Journal of the American Chemical Society

当前位置： X-MOL 学术 › J. Am. Chem. Soc. › 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.)

A Single-Crystal Open-Capsule Metal–Organic Framework
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2019-05-01 , DOI: 10.1021/jacs.9b02417
Yong-Sheng Wei ₁ , Mei Zhang ₁ , Mitsunori Kitta ₂ , Zheng Liu ₃ , Satoshi Horike _{1,

4} , Qiang Xu _{1,

2}

Affiliation

Micro-/nanocapsules have received substantial attention due to various potential applications for storage, catalysis, and drug delivery. However, their conventional enclosed non-/polycrystalline walls pose huge obstacles for rapid loading and mass diffusion. Here, we present a new single-crystal capsular-MOF with openings on the wall, which is carefully designed at the molecular level and constructed from a crystal-structure transformation. This rare open-capsule MOF can easily load the largest amounts of sulfur and iodine among known MOFs. In addition, derived from capsular-MOF and melamine through pyrolysis-phosphidation, we fabricated a nitrogen-doped capsular carbon-based framework with iron-nickel phosphide nanoparticles immobilized on capsular carbons interconnected by plentiful carbon nanotubes. Benefiting from synergistic effects between the carbon framework and highly surface-exposed phosphide sites, the material exhibits efficient multifunctional electrocatalysis for oxygen evolution, hydrogen evolution, and oxygen reduction, achieving well-qualified assemblies of an overall water splitting (low potential of 1.59 V at 10 mA·cm-2) and a rechargeable Zn-air battery (high peak power density of 250 mW·cm-2 and excellent stability for 500 h), which afford remarkably practical prospects over previously known electrocatalysts.

中文翻译：

单晶开放胶囊金属-有机框架

由于在储存、催化和药物输送方面的各种潜在应用，微/纳米胶囊受到了广泛关注。然而，它们传统的封闭非/多晶壁对快速加载和质量扩散构成了巨大障碍。在这里，我们提出了一种新的单晶胶囊-MOF，壁上有开口，它是在分子水平上精心设计的，并由晶体结构转换构成。在已知的 MOF 中，这种罕见的开放胶囊 MOF 可以轻松装载最大量的硫和碘。此外，我们通过热解磷化从胶囊-MOF 和三聚氰胺衍生而来，制造了一种氮掺杂的胶囊碳基框架，铁镍磷化物纳米粒子固定在胶囊碳上，通过大量碳纳米管相互连接。

更新日期：2019-05-01

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