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MOF-Stabilized Pd Nanosheets With Exposed Active Crystal Planes for Efficient Hydrogen Evolution
Ning Song1, Jingsai Cheng2, Hongjun Dong1
1Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P. R. China.
Chemsuschem
|July 9, 2026
Summary
This study developed palladium (Pd) nanosheets on a metal-organic framework (MOF) to expose high-energy crystal planes for enhanced electrocatalysis. The new catalyst demonstrates superior activity and stability for the hydrogen evolution reaction (HER).
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Exposing high-energy crystal planes in catalysts is thermodynamically challenging.
- Palladium (Pd) catalysts are crucial for reactions like the hydrogen evolution reaction (HER).
- Existing catalysts often suffer from aggregation and limited stability.
Purpose of the Study:
- To construct Pd nanosheets with exposed high-energy (110) crystal planes.
- To stabilize these active planes using a metal-organic framework (MOF) for improved electrocatalytic performance.
- To investigate the activity and durability of the novel Pd/MOF catalyst for HER.
Main Methods:
- Layer-by-layer (LBL) electrodeposition was used to synthesize Pd nanosheets on an IRMOF substrate.
- The MOF matrix was employed to prevent Pd aggregation and stabilize the exposed (110) planes via Pd-N bonds.
- Electrocatalytic performance for HER was evaluated, including overpotential and durability tests.
Main Results:
- The Pd/IRMOF-3 catalyst exhibited exposed high-energy (110) crystal planes and Pd-N bonds.
- It achieved ultralow overpotentials of 15 mV at 10 mA cm-2 and 370 mV at 1000 mA cm-2 for HER.
- The catalyst outperformed commercial Pt/C and demonstrated excellent durability, operating for 320 hours at 10 mA cm-2 with preserved structure.
Conclusions:
- MOF-stabilized Pd nanosheets with exposed active crystal planes offer a promising strategy for high-performance electrocatalysts.
- This approach enables simultaneous high activity and long-term stability for reactions like HER.
- The findings provide insights for designing next-generation electrocatalysts with tailored active sites.
