Fine-Tuning the Coordinatively Unsaturated Metal Sites of Metal−Organic Frameworks by Plasma Engraving for Enhanced Electrocatalytic Activity
Article
Article Title | Fine-Tuning the Coordinatively Unsaturated Metal Sites of Metal−Organic Frameworks by Plasma Engraving for Enhanced |
---|---|
ERA Journal ID | 40638 |
Article Category | Article |
Authors | Jiang, Zongrui (Author), Ge, Lei (Author), Zhuang, Linzhou (Author), Li, Mengran (Author), Wang, Zhanke (Author) and Zhu, Zhonghua (Author) |
Journal Title | ACS Applied Materials and Interfaces |
Journal Citation | 11 (47), pp. 44300-44307 |
Number of Pages | 8 |
Year | 2019 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsami.9b15794 |
Web Address (URL) | https://pubs.acs.org/doi/abs/10.1021/acsami.9b15794 |
Abstract | Metal−organic frameworks (MOFs) have recently emerged as promising electrocatalysts because of their atomically dispersed metal sites and porous structures. The active sites of MOF catalysts largely exist as coordinatively unsaturated metal sites (CUMSs). In this study, facile microwave-induced plasma engraving is applied to finetune the CUMSs of cobalt-based MOF (Co-MOF-74) without destroying its phase integrity by controlling the plasma engraving species, intensity, and duration. The electrochemical activity of the engraved MOF is found to be quantitatively correlated to the coordination geometry of the metal centers corresponding to CUMSs. Specifically, the hydrogen plasma-engraved Co-MOF-74 shows an enhanced catalytic activity of oxygen evolution reaction, which exhibits a low overpotential (337 mV at 15 mA cm−2), high turnover frequency (0.0219 s−1), and large mass activity (54.3 A g−1). The developed CUMS control strategy and the revealed CUMSs activity correlation can inspire the further microstructure tuning of MOFs for various applications. |
Keywords | metal−organic framework; oxygen evolution reaction; coordinatively unsaturated metal site; defect; plasma engraving |
ANZSRC Field of Research 2020 | 340305. Physical properties of materials |
400408. Reaction engineering (excl. nuclear reactions) | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5755/fine-tuning-the-coordinatively-unsaturated-metal-sites-of-metal-organic-frameworks-by-plasma-engraving-for-enhanced-electrocatalytic-activity
159
total views8
total downloads0
views this month0
downloads this month