Citation: Wenxiu Yang, Jinfeng Zhang, Quanlong Xu, Yun Yang, Lijie Zhang. Bimetallic AuCu Alloy Decorated Covalent Organic Frameworks for Efficient Photocatalytic Hydrogen Production[J]. Acta Physico-Chimica Sinica, ;2024, 40(10): 231201. doi: 10.3866/PKU.WHXB202312014 shu

Bimetallic AuCu Alloy Decorated Covalent Organic Frameworks for Efficient Photocatalytic Hydrogen Production

1.
Wenzhou Key Lab of Advanced Energy Storage and Conversion, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, Zhejiang Province, China
2.
Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, College of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, Anhui Province, China

Corresponding author: Quanlong Xu, xuql@wzu.edu.cn Lijie Zhang, ljzhang@wzu.edu.cn
Received Date: 12 December 2023
Revised Date: 12 January 2024
Accepted Date: 12 January 2024
Available Online: 18 January 2024
Fund Project: the National Natural Science Foundation of China 52073263the National Natural Science Foundation of China 52171145the National Natural Science Foundation of China 21905209

Covalent organic frameworks (COFs) represent a kind of novel crystalline porous organic substances with extended π-conjugation framework and tunable structures, which display great promise in photocatalysis. However, unadorned COFs suffer from sluggish reaction kinetics, and a cocatalyst is essentially needed to reduce the activation barrier toward specific surface reaction and accelerate reaction kinetics. In this work, bimetallic alloys serving as co-catalysts were decorated on COFs to enhance the photocatalytic hydrogen evolution performance. By precisely-tuning the ratio of AuCu alloy, the resultant Au₁Cu₅/COF-TpPa displays the highest photocatalytic hydrogen generation rate (8.24 mmol∙g⁻¹∙h⁻¹), even surpassing the Pt modified COF-TpPa (6.51 mmol∙h⁻¹∙g⁻¹). According to the systematic characterizations and theoretical calculation, Au₁Cu₅/COF-TpPa exhibits the significantly enhanced charge carrier separation efficiency and reduced H* formation energy barrier, thus possessing high photocatalytic performance. This work affords a valuable approach to advancing COF-based photocatalysts by employing bimetallic alloy cocatalysts.
- Photocatalysis,
- H₂ generation,
- Covalent organic framework,
- Bimetallic cocatalyst
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沈阳化工大学材料科学与工程学院沈阳 110142