Cobalt/cerium-based metal-organic framework composites for enhanced oxygen evolution electrocatalysis. (26th March 2022)

• Record Type: Journal Article
• Authors: Ai, Lunhong; Luo, Yang; Huang, Weijie; Tian, Yao; Jiang, Jing
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 26(2022)
• Page Start: 12893
• Page End: 12902
• Publication Date: 2022-03-26
• Subjects: Metal-organic framework -- Oxygen evolution reaction -- Electrocatalysis -- Cobalt -- Cerium; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.02.043
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Rational design of multivariate metal-organic framework (MOF)-based electrocatalysts with favorably heterostructures is highly desirable for the oxygen evolution reaction (OER). In this work, we report the rational construction of a series of CoCe-based MOFs (Co1-x Cex -BTC, x = 0, 0.1, 0.15 and 0.2) for OER electrocatalysis, and demonstrate the catalytically inactive Ce-BTC as a new OER promoter greatly boosts the electroctalaytic performance of Co-BTC. The resulting Co0·9 Ce0.1 -BTC exhibits the outstanding OER performances with a low overpotential of 308 mV at a current density of 10 mA cm −2 and a long-term stability within 25 h, which is favorably comparable to those of the commercial IrO2 and other previously reported MOF-based OER electrocatalysts. Graphical abstract: Image 1 Highlights: Cox Ce1-x -BTC MOFs are synthesized by a simple solvothermal approach. Ce-modulated Co-BTC for enhanced OER performances is achieved. Co0·9 Ce0.1 -BTC exhibits the best OER performance among all the samples. Co0·9 Ce0.1 -BTC demands a relatively small η10 of 308 mV for OER.