Constructing 2D MOFs from 2D LDHs: a highly efficient and durable electrocatalyst for water oxidation

被引：117

作者：

Cai, Mengke ^{[1
]}

Liu, Qinglin ^{[1
]}

Xue, Ziqian ^{[1
]}

Li, Yinle ^{[1
]}

Fan, Yanan ^{[1
]}

Huang, Aiping ^{[2
]}

Li, Man-Rong ^{[1
]}

Croft, Mark ^{[3
]}

Tyson, Trevor A. ^{[4
]}

Ke, Zhuofeng ^{[5
]}

Li, Guangqin ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem, Lehn Inst Funct Mat, MOE Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, Sch Chem, Key Lab Polymer Composites & Funct Mat, Minist Educ, Guangzhou 510275, Guangdong, Peoples R China

[3] Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA

[4] New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA

[5] Sun Yat Sen Univ, Sch Mat Sci & Engn, Key Lab Polymer Composite & Funct Mat, Minist Educ, Guangzhou 510275, Guangdong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2020年 / 8卷 / 01期

关键词：

METAL-ORGANIC FRAMEWORKS; 2-DIMENSIONAL MATERIALS; OXYGEN; NI; (OXY)HYDROXIDE; NANOSHEETS; ULTRATHIN; REDUCTION; NANOCAGES; ARRAYS;

D O I：

10.1039/c9ta09397d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-dimensional (2D) materials have been widely applied in electrochemical conversion technologies, especially toward the water oxidation reaction (WOR) in metal-air batteries and water splitting. Here, we demonstrate a facile ligand-assisted synthetic method, promoting the transformation of 2D layered double hydroxides (LDHs) into 2D metal-organic frameworks (MOFs). The CoFe-LDH precursor acts as an adjustable metal release source, controlling heterogeneous nucleation for 2D MOFs. Compared with most cobalt-based electrocatalysts, the optimized CoFe 2D MOFs exhibit a superior WOR performance on glassy-carbon electrodes (overpotential of 274 mV at 10 mA cm(-2) and a Tafel slope of 46.7 mV dec(-1)) and long-term stability, due to the unique 2D characteristics and coupling effect between Co and Fe ions. More importantly, this work highlights the ability to transform 2D LDHs into 2D MOFs and reveals the intrinsic factors for excellent performance in the WOR.

引用

页码：190 / 195

页数：6

共 59 条

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