A manganese doping deficient cerium base metal organic framework as radical scavenger for highly-durable proton exchange membrane water electrolysis

Huang, Henghui1; Zhong, Zihao1; Fan, Jiantao2; Li, Hui2

2024-12-01

10.1016/j.memsci.2024.123207

JOURNAL OF MEMBRANE SCIENCE   影响因子和分区

0376-7388

1873-3123

Eliminating hydrogen peroxide and free radicals from electrochemical reactions is crucial for mitigating chemical degradation and improving the durability of proton exchange membranes (PEMs). Herein, we prepare a metal-organic framework containing manganese and cerium ions that possesses oxygen vacancy defects and amino functional groups. The prepared Ce4MnBDC-NH2 acts as a catalyst for H2O2 decomposition and as a free radical scavenger, and it is incorporated into a perfluorosulfonic acid (PFSA) ionomer matrix. Featuring large pore volume, high porosity, and abundant amino groups, the Ce4MnBDC-NH2 is locked in a PEM. The obtained Ce4Mn-NH2BDC@PFSA composite membrane exhibits high dimensional stability, excellent proton conductivity and low high-frequency impedance, yielding a proton conductivity of up to 137 mS cm-1 and superior water electrolysis performance of up to 1.83 V at 3.0 A cm-2. Moreover, the obtained Ce4Mn-NH2BDC@PFSA membrane experiences lower weight loss during the Fenton reaction, a low fluoride-ion release rate, and excellent stability in high current density durability testing: its decay rate is only 5.2 mu V h-1, which is lower than that of CeO2@PFSA and Nafion 117 membranes. This work provides a promising method to prepare efficient free radical scavengers for steady-state PEM water electrolysis.

Proton exchange membrane Metal-organic framework materials Radical scavenger Durability Water electrolysis performance

SCI ; EI

英语

通讯

Engineering ; Polymer Science

Engineering, Chemical ; Polymer Science

WOS:001301652000001

ELSEVIER

CHEMISTRY

Web of Science

1.Foshan Univ, Sch Mat Sci & Hydrogen Energy, Foshan 528000, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Huang, Henghui,Zhong, Zihao,Fan, Jiantao,et al. A manganese doping deficient cerium base metal organic framework as radical scavenger for highly-durable proton exchange membrane water electrolysis[J]. JOURNAL OF MEMBRANE SCIENCE,2024,712.

Huang, Henghui,Zhong, Zihao,Fan, Jiantao,&Li, Hui.(2024).A manganese doping deficient cerium base metal organic framework as radical scavenger for highly-durable proton exchange membrane water electrolysis.JOURNAL OF MEMBRANE SCIENCE,712.

Huang, Henghui,et al."A manganese doping deficient cerium base metal organic framework as radical scavenger for highly-durable proton exchange membrane water electrolysis".JOURNAL OF MEMBRANE SCIENCE 712(2024).