December 6, 2025Langmuir0 citations

Co- and V-Doped MoS 2 Nanosheet Composites for Efficient Hydrogen Evolution Reaction in the Universal pH Range

Key Points

Catalytic performance improved significantly with Co and V doping, achieving low overpotentials of 86 mV in alkaline and 153 mV in acidic environments.
Observational analysis of nanomaterials synthesized using ammonium heptamolybdate and thiourea revealed enhanced stability and efficiency for hydrogen evolution reaction.
The method involved a one-step hydrothermal process to create Co- and V-doped MoS2 supported on carbon cloth, demonstrating potential for low-cost electrocatalytic materials.
These findings underscore the viability of using polyoxometalates as precursors for improved electrocatalytic applications in hydrogen production.

Abstract

Leveraging the exceptional tunability of polyoxometalates (POMs), we modified ammonium heptamolybdate using methods such as metal doping, organic modification, and cation exchange. As a result, we successfully synthesized organic molecule-modified POM containing three metals, Co (NH3) 6Mo6VO18 (OCH2) 3CH2 (CoMo6V-H), for the first time. Subsequently, using this POM as a precursor and thiourea as the sulfur source, Co- and V-doped MoS2-based nanomaterials supported on carbon cloth (Co, V-MoS2@CC) were fabricated via a one-step hydrothermal method. By means of a series of characterizations and electrochemical measurements, the outcomes demonstrate that doping with Co and V effectively boosts the catalytic performance of MoS2. In alkaline and acidic environments, at an operating current density of 10 mA/cm2, the overpotentials of the catalyst are only 86 and 153 mV, respectively, demonstrating excellent HER performance and outstanding chemical stability (72 h). These findings offer fresh insights and references for the preparation of electrocatalytic materials that are both low-cost and highly efficient.

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