Boosting the Electrocatalytic Water Splitting Performance Using Hydrophilic Metal-Organic Framework

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing efficient electrocatalysts is crucial for energy conversion technologies.
• Palladium/Carbon (Pd/C) is a common electrocatalyst, but its performance can be further improved.
• Metal-Organic Frameworks (MOFs) offer tunable properties for catalytic applications.

Purpose of the Study:

• To synthesize a novel hybrid electrocatalyst, Pd/C@MOF-303, for the Hydrogen Evolution Reaction (HER).
• To investigate the effect of MOF-303 on the HER performance of Pd/C electrodes.
• To explore the potential of MOF-modified electrodes in electrochemical applications.

Main Methods:

• Rapid microwave-assisted synthesis of Metal-Organic Framework (MOF-303).
• Embedding MOF-303 onto Palladium/Carbon (Pd/C) electrodes to form Pd/C@MOF-303.
• Characterization of the hybrid material and systematic investigation of its HER performance.

Main Results:

• The Pd/C@MOF-303 composite showed improved HER performance compared to unmodified Pd/C.
• Overpotential for HER at 10 mA cm⁻² was reduced from 185 mV (Pd/C) to 175 mV (Pd/C@MOF-303).
• Enhanced HER activity, mass activity, and charge transfer rates were observed for Pd/C@MOF-303.

Conclusions:

• The hydrophilic MOF-303 effectively tailors the surface characteristics of Pd/C electrocatalysts.
• Pd/C@MOF-303 demonstrates superior catalytic activity for the Hydrogen Evolution Reaction.
• This study provides insights into designing advanced electrocatalysts using MOF integration.