文献类型：期刊文献

英文题名：Structural and Electronic Modulation of Iron-Based Bimetallic Metal-Organic Framework Bifunctional Electrocatalysts for Efficient Overall Water Splitting in Alkaline and Seawater Environment

作者：Luo, Yun[1];Yang, Xiaodong[2,3];He, Li[1];Zheng, Yang[1];Pang, Jianxiang[1];Wang, Liping[1];Jiang, Rong[1];Hou, Juan[1];Guo, Xuhong[1,4];Chen, Long[1]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[2]Shihezi Univ, Coll Sci, Key Lab Ecophys, Shihezi 832003, Peoples R China;[3]Shihezi Univ, Coll Sci, Dept Phys, Shihezi 832003, Peoples R China;[4]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：14

期号：41

起止页码：46374

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20224212896657);WOS:【SCI-EXPANDED(收录号:WOS:000876221900001)】；

基金：This work was supported by the Natural Science Foundation of China (51962032 and 31800828) and the project sponsored by the Youth Innovative Talents Cultivation Fund, Shihezi University (CXPY201913).

语种：英文

外文关键词：bimetallic MOF; electrocatalysis; water splitting; self-supporting growth; electronic modulation; seawater

摘要：Metal-organic frameworks (MOFs) are considered potential electrocatalysts for efficient water splitting. However, the structure-activity relationship of most MOFs is not systematically analyzed for electrocatalysis for anodes and cathodes. In this paper, we provide a strategy to modulate the electronic microstructure of iron-based bimetallic MOFs (MFe-BDC (M: Mg, Zn, Cd)) grown on the nickel foam (NF) as bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The optimal bimetallic CdFe-BDC via modulating appropriate metal cations of IIA and IIB possesses excellent OER and HER performance with the lowest overpotentials of 290 mV at 100 mA cm(-2) and 148 mV at 10 mA cm(-2), respectively. The overall water splitting performance of the as-prepared CdFe-BDC requires 1.68 V to achieve a current density of 10 mA cm(-2) in the real seawater media, and it exhibits the competitive H-2 and O-2 production rates of 6.4 and 3.1 mu L s(-1), respectively, in ambient alkaline conditions, suggesting its potential practical applications. Density functional theory (DFT) calculations demonstrate the relationship between microstructure and electrocatalytic performance of bimetallic MFe-BDC. This work emphasizes the significance of tailoring the electronic microstructure of bimetallic MOFs for efficient overall water splitting in alkaline and seawater environment.