Cobalt Molybdenum Telluride as an Efficient Trifunctional Electrocatalyst for Seawater Splitting
Location
Innovation Lab, Room 212
Start Date
4-3-2025 10:30 AM
End Date
4-3-2025 11:00 AM
Presentation Date
3 April 2025, 10:30am - 11:00am
Meeting Name
2025 - Miners Solving for Tomorrow Research Conference
Department(s)
Chemistry
Document Type
Presentation
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2025 The Authors, All rights reserved
COinS
Apr 3rd, 10:30 AM
Apr 3rd, 11:00 AM
Cobalt Molybdenum Telluride as an Efficient Trifunctional Electrocatalyst for Seawater Splitting
Innovation Lab, Room 212
Comments
Advisor: Manashi Nath
Abstract:
A mixed-metal ternary chalcogenide, cobalt molybdenum telluride (CMT), has been identified as an efficient tri-functional electrocatalyst for seawater splitting, leading to enhanced oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and oxygen reduction reaction (ORR). The CMT was synthesized by a single step hydrothermal technique. Detailed electrochemical studies of the CMT-modified electrodes showed that CMT has a promising performance for OER in the simulated seawater solutions, exhibiting a small overpotential of 385 mV at 20 mA cm−2, and superior catalyst durability for prolonged period of continuous oxygen evolution. Interestingly, while gas chromatography analysis confirmed the evolution of oxygen in an anodic chamber, it showed that there was no chlorine evolution from these electrodes in alkaline seawater, highlighting the novelty of this catalyst. CMT also displayed remarkable ORR activity in simulated seawater as indicated by its four-electron reduction pathway forming water as the dominant product. One of the primary challenges of seawater splitting is chlorine evolution from the oxidation of dissolved chloride salts. The CMT catalyst successfully and significantly lowers the water oxidation potential, thereby separating the chloride and water oxidation potentials by a larger margin. These results suggest that CMT can function as a highly active tri-functional electrocatalyst with significant stability, making it suitable for clean energy generation and environmental applications using seawater.
Key words:
seawater splitting; oxygen evolution reaction; oxygen reduction reaction; hydrogen evolution reaction; tri-functional electrocatalyst.