非贵金属Ni_2P助催化剂修饰KCa_2Nb_3O_(10)超薄纳米片的光解水产氢性能研究

Noble-metal-free Ni2P Cocatalyst Decorated KCa2Nb3O10 Ultrathin Nanosheets for Efficient Photocatalytic Hydrogen Evolution

开发高效非贵金属助催化剂是光解水产氢领域研究的重点。首次将Ni_2P纳米颗粒作为高效助催化剂经一步热处理法修饰在KCa_2Nb_3O_(10)超薄纳米片表面,成功构建了Ni_2P/KCa_2Nb_3O_(10)复合光催化剂,所制备的复合光催化剂展现出具有丰富异质界面的二维纳米结构,活性最佳的Ni_2P/KCa_2Nb_3O_(10)产物光催化产氢效率高达72.25μmol g~(-1)h~(-1),是纯相KCa_2Nb_3O_(10)产氢效率的18.8倍。提供了一种负载其他非贵金属助催化剂制备高效KCa_2Nb_3O_(10)基复合光催化剂的新策略。

Efficient noble-metal-free cocatalyst is highly desirable for sunlight driven photocatalytic H2 evolution.Herein,Ni2P was first decorated on KCa2Nb3O10 ultrathin nanosheets as a high-efficiency cocatalyst by a single-step thermal anneal⁃ing process.The results indicate that Ni2P/KCa2Nb3O10 composites exhibit a two-dimensional nanostructure with a good con⁃tact interface and stability.The optimal Ni2P/KCa2Nb3O10 composite shows an excellent photocatalytic activity with the H2 evolution rate of 72.25μmol g-1 h-1,which is about 18.8 times higher than that of pure KCa2Nb3O10 under simulated sunlight irradiation,indicating that Ni2P could be used as an efficient noble-metal-free cocatalyst.This work affords an alternative strategy for the development of high efficiency KCa2Nb3O10 composite photocatalyst anchoring other superior noble-metalfree cocatalyst.