氧化钼与铂作为单侧双助催化剂协同作用以提高g-C₃N₄上的光催化析氢性能
Synergy of MoO with Pt as Unilateral Dual Cocatalyst for Improving Photocatalytic Hydrogen Evolution over g-C N.
作者信息
Su Fengyun, Wang Zhishuai, Tian Mengzhen, Yang Chunxia, Xie Haiquan, Ding Chenghua, Jin Xiaoli, Chen Jiaqi, Ye Liqun
机构信息
Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, 473061, P. R. China.
College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, P. R. China.
出版信息
Chem Asian J. 2023 Jan 17;18(2):e202201139. doi: 10.1002/asia.202201139. Epub 2022 Dec 30.
Pt is usually used as cocatalyst for g-C N to produce H by photocatalytic splitting of water. However, the photocatalytic performance is still limited by the fast recombination of photo-generated electrons and holes, as well as the poor absorption of visible light. In this work, MoO /g-C N composites were prepared, in which MoO synergetic with Pt photo-deposited during H evolution reaction worked as unilateral dual cocatalyst to improve the photocatalytic activity. Within 4 hours of irradiation, the hydrogen production rate of MoO -Pt dual cocatalyst modified g-C N reached 3804.89 μmol/g/h, which was 120.18 times of that of pure g-C N (GCN, 31.66 μmol/g/h), 10.98 times of that of MoO modified g-C N (346.39 μmol/g/h), and 9.18 times of that of Pt modified g-C N (413.64 μmol/g/h). Characterization results demonstrate that the deficient MoO not only promoted visible light absorption of g-C N , but also worked as a "electron pool" to capture and transfer electrons to Pt.
铂通常用作石墨相氮化碳（g-C₃N₄）的助催化剂，通过光催化分解水来制氢。然而，光催化性能仍受光生电子和空穴快速复合以及可见光吸收较差的限制。在这项工作中，制备了二氧化钼（MoO₃）/g-C₃N₄复合材料，其中在析氢反应过程中光沉积的MoO₃与Pt协同作用，作为单边双助催化剂提高光催化活性。在光照4小时内，MoO₃-Pt双助催化剂修饰的g-C₃N₄的产氢速率达到3804.89 μmol/g/h，是纯g-C₃N₄（GCN，31.66 μmol/g/h）的120.18倍，是MoO₃修饰的g-C₃N₄（346.39 μmol/g/h）的10.98倍，是Pt修饰的g-C₃N₄（413.64 μmol/g/h）的9.18倍。表征结果表明，缺陷的MoO₃不仅促进了g-C₃N₄对可见光的吸收，还作为“电子池”捕获电子并将其转移到Pt上。
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