{Mo₄}-directed structural evolution of highly reduced molybdenum red clusters for efficient proton conduction.

Area of Science:

• Inorganic Chemistry
• Materials Science
• Electrochemistry

Background:

• Proton conduction is crucial for energy applications like fuel cells.
• Developing efficient proton conductors often involves complex molecular architectures.
• Molybdenum (Mo) clusters offer unique structural and electronic properties for such applications.

Purpose of the Study:

• To synthesize and characterize a series of highly reduced Molybdenum (Mo) red clusters.
• To investigate the proton conduction capabilities of these novel Mo clusters.
• To correlate structural features with proton conductivity performance.

Main Methods:

• Rational assembly of planar {MoV4} building blocks to create {Mo28}, {Mo30}, and {Mo40} clusters.
• Synthesis and structural characterization of the resulting Mo red clusters.
• Electrochemical testing to measure proton conductivity under various conditions.

Main Results:

• Successfully synthesized three distinct highly reduced Mo red clusters: {Mo28} (1), {Mo30} (2), and {Mo40} (3).
• {Mo40} cluster exhibited the highest proton conductivity, reaching 7.56 × 10^-3 S cm^-1 under optimal conditions.
• The enhanced conductivity of {Mo40} was attributed to its highly efficient internal hydrogen-bonding network.

Conclusions:

• The rational design and synthesis of Mo red clusters provide a viable route to new proton-conducting materials.
• {Mo40} represents a promising candidate for proton conduction applications, showcasing the importance of structural organization.
• Further research into Mo cluster architectures could lead to advanced materials for electrochemical energy devices.