Fine-Tuning the Metal Oxo Cluster Composition and Phase Structure of Ni/Ti Bimetallic MOFs for Efficient CO<sub>2</sub> Reduction
Siyuan Chen, Xiulan Xu, Hongyi Gao, Jingjing Wang, Ang Li, Xiaowei Zhang
Abstract
The photocatalytic activity of metal–organic frameworks (MOFs) is closely related to the components and structures of metal oxo clusters. In this article, a gradient modulation of metal oxo cluster components is achieved via tuning the molar ratio of Ni2+/Ti4+ in the Ni/Ti bimetallic MOFs. Ni/Ti bimetallic MOFs exhibit adjustable physicochemical properties and enhanced photocatalytic activity compared with Ti-MOF and Ni-MOF. The introduction of Ni with high electron affinity in titanium oxo clusters is responsible for the enhanced charge separation and transfer in Ni/Ti bimetallic MOFs. The extended tunability of components and structures of Ni/Ti bimetallic MOFs provides more opportunities for MOF-based materials design.