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Updated: Apr 13, 2026
13:29
Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
Published on: August 23, 2012
14.1K
Tailoring Second Coordination Sphere for Tunable Solid-Liquid Interfacial Charge Transfer toward Enhanced
Yangguang Hu1,2, Wu Zhou3, Wanbing Gong2
1Anhui Engineering Research Center of Carbon Neutrality, The Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, 241002, Wuhu, Anhui, China.
Angewandte Chemie (International Ed. in English)
|March 6, 2024
Summary
Molecular catalyst design optimizes charge transfer for efficient photoelectrochemical (PEC) hydrogen (H2) production. This approach enhances p-Si photocathode performance and durability, overcoming limitations in solar fuel generation.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Recombination of photogenerated charge carriers limits photoelectrochemical (PEC) hydrogen (H2) production efficiency.
- Optimizing charge transfer at the solid-liquid interface is crucial for improving PEC performance.
Purpose of the Study:
- To overcome charge carrier recombination limitations in PEC H2 production.
- To enhance H2 production performance by molecular catalyst design on p-Si photocathodes.
Main Methods:
- Modulating p-Si photocathode surfaces with molecular catalysts featuring varied metal atoms and organic ligands.
- Designing molecular catalysts with specific metal centers and coordination spheres, including electron-withdrawing groups.
Main Results:
- Co(pda-SO3H)2 identified as an efficient and durable catalyst for H2 production.
- Modulation with Co(pda-SO3H)2 elevated photocathode flat-band potentials (81-124 mV).
- Achieved >95% Faradaic efficiency for H2 production, maintained over 18-21 hours.
Conclusions:
- Molecular catalyst design can effectively engineer band edges of semiconductor-catalyst hybrids.
- Optimized charge transfer dynamics via molecular catalysts significantly boost PEC H2 production.
- Band-edge engineering is a key consideration for developing advanced PEC H2 production systems.
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