Oxygen Vacancy Shell Coupled Pt Clusters Engineering for Sunlight Driven Selective Decarboxylation of Amino Acids

Area of Science:

• Materials Science
• Catalysis
• Green Chemistry

Background:

• Conventional thermo-catalytic processes for amine production are energy-intensive and generate excess CO2.
• Solar-driven photocatalysis offers a sustainable alternative for producing bio-based amines from amino acids.

Purpose of the Study:

• To design and synthesize a novel heterogeneous photocatalyst for efficient solar-driven amino acid decarboxylation.
• To enhance the selectivity and productivity of bio-based amine production using sustainable solar energy.

Main Methods:

• Fabrication of a TiO2-based photocatalyst with an oxygen vacancy (V_O) rich shell and platinum (Pt) nanoclusters (Pt NCs).
• Characterization of the catalyst's structure and properties, including electron lifetime.
• Evaluation of the photocatalyst's performance in the decarboxylation of L-lysine and other amino acids under sunlight irradiation.

Main Results:

• The engineered Pt/TiO2@V_O-shell catalyst demonstrated a prolonged electron lifetime (1.12 ns) due to strong V_O-Pt NC interaction.
• Achieved a cadaverine selectivity of 70.2% and productivity of 154.5 mM/g for L-lysine decarboxylation, significantly outperforming control catalysts.
• Demonstrated high selectivity (>50%) for other aliphatic amino acids and improved selectivity (73.5%) under prolonged sunlight exposure.

Conclusions:

• The novel Pt/TiO2@V_O-shell catalyst effectively utilizes solar energy for efficient and selective bio-based amine production.
• The synergistic effect between oxygen vacancies and Pt nanoclusters is crucial for enhancing photocatalytic activity.
• This work presents a promising strategy for sustainable chemical synthesis, bridging solar energy utilization and high-value product generation.