NiS和Pt双助催化剂增强BaTiO_(3)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 BaTiO_(3) nanofibers

作　　者：王娟 王仲秋 商琴 王国宏 李金懋 WANG Juan;WANG Zhongqiu;SHANG Qin;WANG Guohong;LI Jinmao(Hubei Key Laboratory of Pollutant Analysis and Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi,Hubei 435002,China)

机构地区：[1]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

出　　处：《无机化学学报》2024年第9期1719-1730,共12页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.52003079,22075072);湖北省自然科学基金(No.2023AFD027)资助。

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BaTiO_(3)/Pt/NiS双异质结光催化剂。优化后的BaTiO_(3)/Pt/NiS样品的制氢速率最高为489μmol·h^(-1)·g^(-1),是纯物质BaTiO_(3)的2.5倍。这主要归因于BaTiO_(3)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BaTiO_(3)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BaTiO_(3)/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。A BaTiO_(3)/Pt/NiS double heterojunction photocatalyst with Pt and NiS as co-catalysts was prepared using electrostatic spinning,hydrothermal,and photo-deposition methods.The optimized BaTiO_(3)/Pt/NiS sample showed the highest hydrogen production rate of 489μmol·h^(-1)·g^(-1),which is 2.5 times higher than that of pure BaTiO_(3).Exper-imental results and density functional theory(DFT)calculations have demonstrated the construction of a p-n junc-tion between BaTiO_(3) and NiS,which efficiently facilitates the transfer of photogenerated holes from BaTiO_(3) to NiS.Additionally,the Schottky junction formed between BaTiO_(3) and Pt promotes the migration of photogenerated elec-trons from BaTiO_(3) 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 BaTiO_(3)/Pt/NiS sample convincingly proved its fastest separation of photogenerated electrons and holes,thus displaying the highest activity for hydrogen production.

关 键 词：BaTiO_(3)/Pt/NiS 纳米纤维 双助催化剂 光催化制氢 

分 类 号：O643.3[理学—物理化学]