An exceptionally stable octacobalt-cluster-based metal-organic framework for enhanced water oxidation catalysis

Ning-Yu Huang; Jian-Qiang Shen; Zi-Ming Ye; Wei-Xiong Zhang; Pei-Qin Liao; Xiao-Ming Chen

doi:10.1039/c9sc03224j

An exceptionally stable octacobalt-cluster-based metal-organic framework for enhanced water oxidation catalysis

Chem Sci. 2019 Sep 10;10(42):9859-9864. doi: 10.1039/c9sc03224j. eCollection 2019 Nov 14.

Authors

Ning-Yu Huang¹, Jian-Qiang Shen^{1

2}, Zi-Ming Ye¹, Wei-Xiong Zhang¹, Pei-Qin Liao¹, Xiao-Ming Chen¹

Affiliations

¹ MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , China . Email: liaopq3@mail.sysu.edu.cn.
² Department of Chemical and Biomolecular Engineering , University of California , Los Angeles , CA 90095 , USA.

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.