Ultrafast electron transfer from CdS quantum dots to atomically-dispersed Pt for enhanced H2 evolution and value-added chemical synthesis

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123196 - 123196

Published: Aug. 21, 2023

Language: Английский

---

Interface Synergy of Exposed Oxygen Vacancy and Pd Lewis Acid Sites Enabling Superior Cooperative Photoredox Synthesis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(47)

Published: Aug. 13, 2024

Abstract Photo‐driven cross‐coupling of o ‐arylenediamines and alcohols has emerged as an alternative for the synthesis bio‐active benzimidazoles. However, tackling key problem related to efficient adsorption activation both coupling partners over photocatalysts towards activity enhancement remains a challenge. Here, we demonstrate interface synergy strategy by exposed oxygen vacancies (V O ) Pd Lewis acid sites benzimidazole hydrogen (H 2 coproduction Pd‐loaded TiO nanospheres with highest photoredox compared previous works so far. The results show that introduction V optimizes energy band structure supplies coordinatively unsaturated adsorbing activating ethanol molecules, affording acetaldehyde active intermediates. acts site, enhancing alkaline amine molecules via acid‐base pair interactions driving condensation process. Furthermore, synergistically promote interfacial charge transfer separation. This work offers new insightful guidance rational design semiconductor‐based at molecular level high‐performance renewable fuels value‐added feedstocks.

Language: Английский

---

Solar-Driven Highly Effective Biomass-Derived Alcohols C–C Coupling Integrated with H₂ Production by CdS Quantum Dots Modified Zn₂In₂S₅ Nanosheets

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(7), P. 4581 - 4592

Published: March 12, 2024

The integration of solar-driven H2 evolution with the selective conversion biomass-derived alcohols into value-added chemicals has gained significant attention for full use electrons and holes. We develop a dual-functional photocatalyst highly oxidation Cα–H bond benzyl alcohol to C–C coupled products (hydrobenzoin deoxybenzoin), in cooperation evolution, using point-to-face interface engineering by decorating CdS quantum dots on Zn2In2S5 nanosheets (CdS QDs/Zn2In2S5 NS). NS exhibit high rate 13 mmol g–1 h–1 formation 10.8 96.3% selectivity. Benzyl achieves 91% an 89% yield gram-scale. introduction enhances interfacial contact, facilitating efficient spatial separation photogenerated electron–hole pairs providing active sites evolution. In situ characterization DFT calculation reveal that carbon-centered radical •CH(OH)C6H5, generated abstracting alcohol, is reactive intermediate photocatalytic process.

Language: Английский

---

Engineering semiconductor quantum dots for co-upcycling of CO₂ and biomass-derived alcohol

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(30), P. 19029 - 19038

Published: Jan. 1, 2024

A heterointerface engineering strategy of immobilizing core–shell CdSe/CdS quantum dots onto SiO 2 spheres was realized to efficiently integrate CO photoreduction with the oxidation furfuryl alcohol in one system.

Language: Английский

---

3D-Printed photocatalysts for revolutionizing catalytic conversion of solar to chemical energy

Progress in Materials Science, Journal Year: 2025, Volume and Issue: 151, P. 101427 - 101427

Published: Jan. 7, 2025

Language: Английский

---

Enigma of Sustainable CO₂ Conversion to Renewable Fuels and Chemicals Through Photocatalysis, Electrocatalysis, and Photoelectrocatalysis: Design Strategies and Atomic Level Insights

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Growing global population, escalating energy consumption, and climate change threaten future security. Fossil fuel combustion, primarily coal, oil, natural gas, exacerbates the greenhouse effect driving warming through CO

Language: Английский

---

N-doped sites modulate Ag/TiO2 interaction for improved photocatalytic degradation of tetracycline

Molecular Catalysis, Journal Year: 2025, Volume and Issue: 573, P. 114815 - 114815

Published: Jan. 5, 2025

Language: Английский

---

Modulation of Schottky Barrier Height and Electronic Structure in Transition-Metal@Nitrogen-Doped-Carbon Core–Shell Cocatalysts Loaded with Mn_xCd_1–xS Nanorods for Enhanced Photocatalytic Hydrogen Evolution

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 2315 - 2327

Published: Jan. 24, 2025

Language: Английский

---

Promising CdS quantum dots/FeS2 microsphere Z-scheme heterojunction for boosting C-C coupling and hydrogen production

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145361 - 145361

Published: March 1, 2025

Language: Английский

---

Mechanistic Insights Enable Divergent Product Selectivity in Catalyst-Controlled Photooxidative Degradation of Polystyrene

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(16), P. 10968 - 10975

Published: Aug. 4, 2023

Polystyrene upcycling to valuable commodity feedstocks is essential for reducing plastic waste. Photooxidative degradation has emerged as a method converting polystyrene oxidized aromatic compounds. Investigating the mechanism of photooxidative understanding pathways generating different small molecules. Here, we leveraged reactivity differences between chlorine and bromine radicals study polystyrene. While with radical yields primarily benzoic acid (50 mol %), shows an increased preference acetophenone (4 % both products). After conducting several mechanistic studies, discovered that activation 3° C–H bonds necessary form acetophenone. However, production, second hydrogen atom transfer from H–Br enables reformation methyl group on polymer chain end. Lastly, insights in hand, added exogenous sources increase concentration HBr improved yield, becoming major product. We envision our into will further enable divergent product selectivity.

Language: Английский

---