Unique Dynamics of Water Confined on the Surface of Metal Oxide Clusters,ChemPhysChem

当前位置： X-MOL 学术 › ChemPhysChem › 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.)

Unique Dynamics of Water Confined on the Surface of Metal Oxide Clusters
ChemPhysChem ( IF 2.3 ) Pub Date : 2020-11-13 , DOI: 10.1002/cphc.202000832
Linkun Cai ₁ , Yuyan Lai ₁ , Panchao Yin ₁

Affiliation

Water confined on metal oxide surface plays significant roles in heterogeneous catalysis. Heteropolyacid, a 1.2 nm‐metal oxide cluster with well‐defined structure, is applied as a model to understand the dynamics of water on its surface. The surface water strongly associates with heteropolyacid cluster and form the so‐called ‘pseudoliquid phase’ where catalytic reactions are conducted. Broadband dielectric spectroscopy and diﬀerential scanning calorimetry have been applied to probe the dynamics of water in this pseudoliquid phase. A supercooling phase transition of water below its normal melting temperature and a dipolar glassy relaxation behaviour due to the hindered dynamics of water have been observed. The rich dynamic behavior on the surface of such well‐defined metal clusters provide new perspectives to understand the properties of surface water and their relation to catalytic performance of heteropolyacid.

中文翻译：

局限在金属氧化物团簇表面的水的独特动力学

局限于金属氧化物表面的水在非均相催化中起着重要作用。杂多酸是一种结构明确的1.2纳米金属氧化物簇，可作为模型来了解其表面水的动力学。地表水与杂多酸簇紧密结合，形成所谓的“伪液相”，在其中进行催化反应。宽带介电谱和差示扫描量热法已被用于探测这种假液相中水的动力学。已经观察到低于其正常熔融温度的水的过冷相变和由于水的动力学受阻而引起的偶极玻璃态弛豫行为。

更新日期：2021-01-07

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11