Jump to main content
Jump to site search


Efficient bifunctional catalysts synthesized from three-dimensional Ni/Fe bimetallic organic frameworks for overall urea electrolysis

Abstract

Herein, the three-dimensional (3D) Ni/Fe bimetallic organic framework (MOF-Ni@MOF-Fe) with a structure of rhombus blocks on nanosheets is synthesized on Ni foam by 2-step solvothermal method. After the sulfide reaction, MOF-Ni@MOF-Fe-S is vulcanized by MOF-Ni@MOF-Fe with a structure of interwoven and folding nanosheets. Meanwhile, Ni3S2 is formed under the influence of iron. This special structure makes MOF-Ni@MOF-Fe-S expose more active sites. MOF-Ni@MOF-Fe-S has superior urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) performance. When MOF-Ni@MOF-Fe-S is used as UOR and HER catalysts, it has low potentials of 1.347 V (vs. RHE) at 10 mA cm–2 and 0.145 V (vs. RHE) at 10 mA cm–2 in 1.0 M KOH with 0.5 M urea, respectively. MOF-Ni@MOF-Fe-S as a bifunctional electrode is assembled as an alkaline urea electrolyzer, showing a catalytic activity at a low cell voltage of 1.539 V at 10 mA cm–2 and excellent stability during 10h chronopotentiometry.

Back to tab navigation

Supplementary files

Article information


Submitted
18 Feb 2020
Accepted
19 Mar 2020
First published
20 Mar 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Efficient bifunctional catalysts synthesized from three-dimensional Ni/Fe bimetallic organic frameworks for overall urea electrolysis

H. Xu, K. Ye, K. Zhu, J. Yin, J. Yan, G. Wang and D. Cao, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT00605J

Social activity

Search articles by author

Spotlight

Advertisements