Related Experiment Video
Updated: Jan 14, 2026
09:58
Light-driven Enzymatic Decarboxylation
Published on: May 22, 2016
12.2K
Optical Switching of Catalytic Pathways for Hydrogen Generation via Light-Handedness Control on Chiral Nanostructures
Qingli Wang1, Jiahong Liu2, Shouyuan Li1
1School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No. 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China.
Angewandte Chemie (International Ed. in English)
|October 24, 2025
Summary
Researchers developed a chiral catalyst that switches between photocatalysis and photothermal catalysis using circularly polarized light. This light-handedness control optimizes solar hydrogen production by tuning reaction pathways for enhanced performance.
Area of Science:
- Materials Science
- Catalysis
- Renewable Energy
Background:
- Precise optical control of catalytic pathways is crucial for efficient solar hydrogen production.
- Current methods lack dynamic tunability between different catalytic modes.
Purpose of the Study:
- To develop a reversible switching mechanism between photocatalysis and photothermal catalysis using light.
- To investigate the role of chemical chirality and circularly polarized light in controlling catalytic pathways.
- To establish a versatile platform for optically tunable solar fuel production.
Main Methods:
- Functionalization of Au@CdS nanocatalysts with chiral cysteine ligands.
- Utilizing circularly polarized light with controlled handedness.
- Monitoring catalytic activity and temperature changes.
- Investigating the chirality-induced spin selectivity (CISS) effect.
Main Results:
- Demonstrated a light-handedness-dependent switching mechanism between photocatalysis and photothermal catalysis.
- Mismatched light chirality and catalyst chirality enhanced photothermal catalysis, reaching 343 K and doubling hydrogen evolution rates.
- Efficient spin-polarized carrier transfer favored photocatalysis under matched conditions.
- Observed hydrogen evolution rates up to 4.8 mmol g-1 h-1.
Conclusions:
- Introduced a novel light-handedness-controlled catalytic switch for dynamic modulation of reaction modes.
- Advanced mechanistic understanding of spin-dependent photothermal phenomena.
- Established a versatile platform for optically tunable solar fuel production using chiral catalysts.
Related Concept Videos
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.8K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.8K
02:13Reduction of Alkenes: Catalytic Hydrogenation
13.9K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.9K
02:50Catalysis
30.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.1K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
2.2K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
2.2K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
12.6K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
12.6K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.9K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
8.9K