The Mechanism of One-Step Synthesis of Oxides from Metal Chlorides and Their Electrocatalytic HER Study

It is well known that a layered structure can improve charge transfer and is a favorable catalyst material. Most of them are metal oxides, and some metal hydroxides and carbonates have also been proved to have good catalytic performance. Generally, the preparation method is to prepare the precursor and then calcinate them to get metal oxides. Through literature review and repeated experiments, it is found that cationic membrane electrosynthesis with CeCl3 center dot 7H(2)O as a raw material may be able to prepare metal oxides in one step. Furthermore, whether Fe, which is also a variable metal, can also form metal oxides in one step is investigated. Therefore, in this study, CeO2, Fe3O4, and Fe2O3 nanomaterials with the hierarchical structure are prepared by cationic membrane electrolytic synthesis at room temperature. The composition and microstructure of the nanomaterials are studied using XRD, FTIR, XPS, and SEM. Finally, the electrochemical hydrogen evolution performance of the samples is simply tested.

Automated summary

It is well known that a layered structure is favorable for charge transfer and catalytic materials. In this study, CeO2, Fe3O4, and Fe2O3 nanomaterials with a hierarchical structure were prepared by cationic membrane electrolytic synthesis, and their composition and microstructure were analyzed using XRD, FTIR, XPS, and SEM. Finally, the electrochemical hydrogen evolution performance of the samples was tested.