Great Location: About Effects of Surface Bound Neighboring Groups for Passive and Active Fine‐Tuning of CO2 Adsorption Properties in Model Carbon Capture Materials,Advanced Materials

当前位置： X-MOL 学术 › Adv. 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.)

Great Location: About Effects of Surface Bound Neighboring Groups for Passive and Active Fine‐Tuning of CO2 Adsorption Properties in Model Carbon Capture Materials
Advanced Materials ( IF 27.4 ) Pub Date : 2021-01-20 , DOI: 10.1002/adma.202007734
Nele Klinkenberg ₁ , Sophia Kraft ₁ , Sebastian Polarz _{1,

2}

Affiliation

Improved carbon capture materials are crucial for managing the CO₂ level in the atmosphere. The past focus was on increasing adsorption capacities. It is widely known that controlling the heat of adsorption (ΔH_ads) is equally important. If it is too low, CO₂ uptake takes place at unfavorable conditions and with insufficient selectivity. If it is too high, chemisorption occurs, and the materials can hardly be regenerated. The conventional approach for influencing ΔH_ads is the modification of the adsorbing center. This paper proposes an alternative strategy. The hypothesis is that fine‐tuning of the molecular environment around the adsorbing center is a powerful tool for the adjustment of CO₂‐binding properties. Via click chemistry, any desired neighboring group (NG) can be incorporated on the surfaces of the nanoporous organosilica model materials. Passive NGs induce a change in the polarity of the surface, whereas active NGs are capable of direct interaction with the active center/CO₂ pair. The effects on ΔH_ads and on the selectivity are studied. A situation can be realized which resembles frustrated Lewis acid–base pairs, and the investigation of the binding‐species by solid‐state NMR indicates that the push–pull effects could play an essential role not only in CO₂ adsorption but also in its activation.

中文翻译：

优越的地理位置：关于模型碳捕获材料中表面结合邻基对被动和主动微调CO2吸附特性的影响

改进的碳捕获材料对于控制大气中的CO ₂含量至关重要。过去的重点是提高吸附能力。众所周知，控制吸附热（ΔH _ads）同等重要。如果它太低，则在不利条件下和选择性不足的情况下发生CO ₂吸收。如果太高，则发生化学吸附，并且材料几乎不能再生。用于影响Δ的常规方法ħ_广告是吸附中心的修改。本文提出了一种替代策略。假设是吸附中心周围分子环境的微调是调整CO ₂的有力工具绑定属性。通过点击化学，可以在纳米多孔有机二氧化硅模型材料的表面上结合任何期望的相邻基团（NG）。被动NG会引起表面极性的变化，而主动NG则能够与主动中心/ CO ₂对直接相互作用。研究了对ΔH _ads和选择性的影响。可以实现类似于沮丧的路易斯酸-碱对的情况，并且通过固态NMR对结合物种的研究表明，推挽效应不仅在CO ₂吸附中而且在其活化中都起着重要作用。。

更新日期：2021-02-22

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