ZIF-9 derived cobalt phosphide and In2O3 as co-catalysts for efficient hydrogen production

Non-noble metal phosphorescent catalysts have attracted people's attention because of their cheap advantages and good photocatalytic efficiency. In this paper, proposed a CoP/In2O3 composite catalyst that performs well in hydrogen production. The total amount of hydrogen released of CoP/In2O3 composite catalyst which sensitized by Eosin Y (EY) after 5 h exposure to visible light reached 251.87 mu mol, which was three times that of pure CoP under the same conditions. The composite catalyst CoP/In2O3 can be prepared by physically mixing CoP and In2O3 which just need one step. Among them, the Co-MOF (ZIF-9) is used as the precursor to prepare CoP by phosphating method, which maintains the framework structure of Co-MOF. In the CoP/In2O3 composite catalyst, the In2O3 particles as co-catalyst are tightly attached to the CoP surface, which improves the separation efficiency of electron-hole pairs. Subsequent photoelectrochemical experiments also proved the improvement of charge transfer efficiency. A multitude of characterization techniques such as XRD, SEM, XPS, BET, etc. were also performed on the prepared samples.

Automated summary

This paper presents a CoP/In2O3 composite catalyst that performs well in hydrogen production with improved charge transfer efficiency. The tight attachment of In2O3 particles as co-catalyst on the CoP surface in the composite catalyst enhances the separation efficiency of electron-hole pairs, as confirmed by subsequent photoelectrochemical experiments. Various characterization techniques were also applied to the prepared samples.