| NiS和Pt双助催化剂增强BaTiO3纳米纤维光催化制氢性能 |
| NiS and Pt as dual co-catalysts for the enhanced photocatalytic H2 production activity of BaTiO3 nanofibers |
| 作者 | 单位 | E-mail | | 王娟 | 湖北师范大学化学化工学院, 污染物分析与资源化技术湖北省重点实验室, 黄石 435002 | wangjuan830508@163.com | | 王仲秋 | 湖北师范大学化学化工学院, 污染物分析与资源化技术湖北省重点实验室, 黄石 435002 | | | 商琴 | 湖北师范大学化学化工学院, 污染物分析与资源化技术湖北省重点实验室, 黄石 435002 | | | 王国宏 | 湖北师范大学化学化工学院, 污染物分析与资源化技术湖北省重点实验室, 黄石 435002 | | | 李金懋 | 湖北师范大学化学化工学院, 污染物分析与资源化技术湖北省重点实验室, 黄石 435002 | jemolee@126.com |
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| 摘要: 采用静电纺丝、水热和光沉积的方法制备了一种以Pt和NiS为助催化剂的BaTiO3/Pt/NiS双异质结光催化剂。优化后的BaTiO3/Pt/NiS样品的制氢速率最高为489 μmol·h-1·g-1，是纯物质BaTiO3的2.5倍。这主要归因于BaTiO3与Pt之间形成的肖特基结促进了光生电子的快速转移，以及BaTiO3与NiS之间构建的p-n结实现了对光生空穴的高效捕获。光电化学测试结果进一步证实了BaTiO3/Pt/NiS异质结光催化剂中的光生电子和空穴被高效分离，从而具有更高的分解水制氢性能。 |
| 关键词: BaTiO3/Pt/NiS 纳米纤维 双助催化剂 光催化制氢 |
| 基金项目: 国家自然科学基金(No.52003079，22075072)和湖北省自然科学基金(No.2023AFD027)资助。 |
| Abstract: A BaTiO3/Pt/NiS double heterojunction photocatalyst with Pt and NiS as co-catalysts was prepared using electrostatic spinning, hydrothermal, and photo-deposition methods. The optimized BaTiO3/Pt/NiS sample showed the highest hydrogen production rate of 489 μmol·h-1·g-1, which is 2.5 times higher than that of pure BaTiO3. Exper-imental results and density functional theory (DFT) calculations have demonstrated the construction of a p-n junction between BaTiO3 and NiS, which efficiently facilitates the transfer of photogenerated holes from BaTiO3 to NiS. Additionally, the Schottky junction formed between BaTiO3 and Pt promotes the migration of photogenerated electrons from BaTiO3 to Pt. The opposite transfer routes of photogenerated electrons and holes naturally inhibit their recombination, resulting in a higher rate of hydrogen evolution. These results were further validated by photoelectro-chemical testing. The highest photocurrent density and smallest electrochemical impedance of the optimized BaTiO3/ Pt/NiS sample convincingly proved its fastest separation of photogenerated electrons and holes, thus displaying the highest activity for hydrogen production. |
| Keywords: BaTiO3/Pt/NiS nanofiber dual co-catalyst photocatalytic hydrogen production |
| 投稿时间：2024-03-28 修订日期：2024-07-12 |
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| 王娟,王仲秋,商琴,王国宏,李金懋.NiS和Pt双助催化剂增强BaTiO3纳米纤维光催化制氢性能[J].无机化学学报,2024,40(9):1719-1730. |
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