Vanadium-Based Trimetallic Metal-Organic-Framework Family as Extremely High-Performing and Ultrastable Electrocatalysts for Water Splitting

Yuxuan Kong; Dengke Xiong; Chunxiao Lu; Jiang Wang; Tian Liu; Shuanglu Ying; Xinghua Ma; Fei-Yan Yi

doi:10.1021/acsami.2c09998

Vanadium-Based Trimetallic Metal-Organic-Framework Family as Extremely High-Performing and Ultrastable Electrocatalysts for Water Splitting

ACS Appl Mater Interfaces. 2022 Aug 24;14(33):37804-37813. doi: 10.1021/acsami.2c09998. Epub 2022 Aug 9.

Authors

Yuxuan Kong¹, Dengke Xiong¹, Chunxiao Lu¹, Jiang Wang¹, Tian Liu¹, Shuanglu Ying¹, Xinghua Ma¹, Fei-Yan Yi¹

Affiliation

¹ School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, P. R. China.

PMID: 35944544
DOI: 10.1021/acsami.2c09998

Abstract

This is the first time that the pore-space-partition (PSP) strategy is being successfully applied in the electrochemical field for water splitting, realizing the highly efficient construction of a series of ultrastable pristine MOF electrocatalysts. On integrating the vanadium-based trimetallic building cluster (M₂V), the target M₂V-MOFs exhibit excellent electrocatalytic activity for HER, OER, and water splitting. In particular, ultralow overpotentials of 314 and 198 mV for Fe₂V-MOF as OER and HER electrocatalysts, respectively, can drive a current density of 10 mA cm^-2. The fabricated Fe₂V-MOF||Pt/C two-electrode configuration for the overall water splitting yields a current density of 10 mA cm^-2 at only 1.6 V vs RHE, which is superior to that of the commercial IrO₂||Pt/C couple. Notably, high structural and chemical stabilities still can be observed in alkaline condition. This work opens up an exciting pathway to design efficient and stable electrocatalysts based on pristine MOF by integrating the PSP strategy and multimetallic centers.

Keywords: V-based catalyst; electrocatalytic stability; metal-organic frameworks; overall water splitting; pore-space-partition.