A Noble-Metal-Free Nickel(II) Polypyridyl Catalyst for Visible-Light-Driven Hydrogen Production from Water.
The complex [Ni(bpy)3](2+) (bpy=2,2'-bipyridine) is an active catalyst for visible-light-driven H2 production from water when employed with [Ir(dfppy)2 (Hdcbpy)] [dfppy=2-(3,4-difluorophenyl)pyridine, Hdcbpy=4-carboxy-2,2'-bipyridine-4'-carboxylate] as the photosensitizer and triethanolamine as the sacrificial electron donor. The highest turnover number of 520 with respect to the nickel(II) catalyst is obtained in a 8:2 acetonitrile/water solution at pH 9. The H2 -evolution system is more stable after the addition of an extra free bpy ligand, owing to faster catalyst regeneration. The photocatalytic results demonstrate that the nickel(II) polypyridyl catalyst can act as a more effective catalyst than the commonly utilized [Co(bpy)3 ](2+). This study may offer a new paradigm for constructing simple and noble-metal-free catalysts for photocatalytic hydrogen production.
College of Materials and Enviromental Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018 (P.R. China). yjyuan@hdu.edu.cn.
Yong-Jun
YJ
Yuan
College of Materials and Enviromental Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018 (P.R. China). luhongwei@hdu.edu.cn.
Hong-Wei
HW
Lu
College of Materials and Enviromental Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018 (P.R. China).
Ji-Ren
JR
Tu
College of Materials and Enviromental Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018 (P.R. China).
Yong
Y
Fang
Ecomaterials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Science, Nanjing University, Nanjing 210093 (P.R. China). yuzt@nju.edu.cn.
Zhen-Tao
ZT
Yu
College of Physics, Liaoning University, Shengyang, Liaoning 110036 (P.R. China).
Xiao-Xing
XX
Fan
Ecomaterials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Science, Nanjing University, Nanjing 210093 (P.R. China).
Zhi-Gang
ZG
Zou
homogeneous catalysis; hydrogen evolution; nickel; photocatalysis; photochemistry