Sulfide Oxidation on Ladder-Type Heteroarenes to Construct All-Acceptor Copolymers for Visible-Light-Driven Hydrogen...

Area of Science:

• Materials Science
• Photocatalysis
• Renewable Energy

Background:

• Conjugated polymers (CPs) are explored as photocatalysts for hydrogen production.
• Existing CPs face challenges with limited active sites and poor solubility, hindering performance.

Purpose of the Study:

• To synthesize novel solution-processable all-acceptor (A1-A2)-type conjugated polymers.
• To enhance photocatalytic hydrogen evolution efficiency and applicability.

Main Methods:

• Synthesis of all-acceptor (A1-A2)-type CPs using sulfide-oxidized ladder-type heteroarene.
• Evaluation of photocatalytic hydrogen evolution in seawater splitting.
• Measurement of apparent quantum yield and hydrogen evolution rates.

Main Results:

• A1-A2 type CPs demonstrated 2-3 orders of magnitude efficiency improvement over donor-acceptor CPs.
• PBDTTTSOS achieved high apparent quantum yields (18.9%–14.8% at 500–550 nm) in seawater splitting.
• Excellent hydrogen evolution rates (35.7 mmol h⁻¹ g⁻¹ and 150.7 mmol h⁻¹ m⁻²) were recorded for thin-film PBDTTTSOS.

Conclusions:

• The developed A1-A2 type CPs offer a significant advancement in photocatalyst design.
• These polymers exhibit high efficiency and broad applicability for hydrogen evolution.
• This research presents a novel strategy for high-performance polymer photocatalysts.