Nickel monatomic electrocatalyst with surface cavity structure as well as preparation method and application of nickel monatomic electrocatalyst

By loading Ni on ZIF-8 and forming a surface hollow structure using the Kirkendal effect, the problem of intrinsic activity of M-N-C material is not fully stimulated and the exposure rate is low, and an efficient carbon dioxide reduction reaction is achieved.

CN120174406AActive Publication Date: 2025-06-20TIANJIN UNIV
6 Cites 0 Cited by

Patent Information

Application Number
CN202510100398.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-22
Publication Date
2025-06-20
Estimated Expiration
2045-01-22

AI Technical Summary

Technical Problem

During the electrocatalytic carbon dioxide reduction process, existing M-N-C materials have problems such that the intrinsic activity of active sites is not fully stimulated and the exposure rate of metal active sites is low, resulting in insufficient reaction efficiency and stability.

Method used

Ni was loaded on ZIF-8 by double solvent impregnation, and a nickel single-atom electrocatalyst with a surface cavity structure was formed through the Kirkendal effect during the pyrolysis process, thereby improving the exposure rate and intrinsic activity of the active site.

Benefits of technology

The preparation of a high-load nickel single-atom catalyst is achieved, which improves the specific surface area and electrochemical active area of ​​the catalyst, enhances the selectivity and reaction efficiency of carbon dioxide reduction, and is suitable for large-scale industrial production.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention belongs to the field of catalysts, and particularly relates to a nickel monatomic electrocatalyst with a surface cavity structure as well as a preparation method and application of the nickel monatomic electrocatalyst. The preparation method comprises the following steps: 1) preparing a metal organic framework Mn-coated ZIF-8; (2) preparing a metal organic framework Ni / Mn-coated ZIF-8; and 3) roasting to obtain the nickel monatomic electrocatalyst with a surface cavity structure. According to the preparation method, Ni is loaded on Mn-coated ZIF-8 by adopting a double-solvent impregnation method, by virtue of the action of intensifying the Kirkendall effect by virtue of trace Mn in the pyrolysis process, non-uniform mutual diffusion occurs among Zn < 2 + >, Ni < 2 + > and Mn < 2 + >, Zn < 2 + > in the ZIF-8 continuously diffuses outwards and volatilizes, Ni < 2 + > in a body is gradually captured by adjacent nitrogen-rich defects, and the nitrogen-rich defect in the ZIF-8 is obtained. And the nickel monatomic catalyst with a surface cavity structure and high loading capacity is formed.
Need to check novelty before this filing date? Find Prior Art