An exceptionally stable octacobalt-cluster-based metal–organic framework for enhanced water oxidation catalysis. Issue 42 (10th September 2019)

• Record Type: Journal Article
• Authors: Huang, Ning-Yu; Shen, Jian-Qiang; Ye, Zi-Ming; Zhang, Wei-Xiong; Liao, Pei-Qin; Chen, Xiao-Ming
• Is Part Of: Chemical science. Volume 10:Issue 42(2019)
• Page Start: 9859
• Page End: 9864
• Publication Date: 2019-09-10
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9sc03224j
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : The site, capping four coplanar cobalt ions, has a near-optimal OH − adsorption energy, which is beneficial to accelerate the reaction kinetics of water oxidation catalysis. Abstract : Extensive efforts have been devoted to developing efficient and durable catalysts for water oxidation. Herein, we report a highly stable metal–organic framework that shows high catalytic activity and durability for electrically driven (an overpotential of 430 mV at 10 mA cm −2 in neutral aqueous solution) and photodriven (a turnover frequency of 16 s −1 and 12 000 cycles) water oxidation, representing the best catalyst for water oxidation reported to date. Computational simulation and isotope tracing experiments showed that the μ4 -OH group of the {Co8 (μ4 -OH)6 } unit participates in the water oxidation reaction to offer an oxygen vacancy site with near-optimal OH − adsorption energy.