Intercalated Iridium Diselenide Electrocatalysts for Efficient pH-Universal Water Splitting

被引：172

作者：

Zheng, Tingting ^{[1
]}

Shang, Chunyan ^{[1
]}

He, Zhihai ^{[1
]}

Wang, Xinyi ^{[1
]}

Cao, Cong ^{[1
]}

Li, Hongliang ^{[1
]}

Si, Rui ^{[2
]}

Pan, Bicai ^{[1
]}

Zhou, Shiming ^{[1
]}

Zeng, Jie ^{[1
]}

机构：

[1] Univ Sci & Technol China, Key Lab Surface & Interface Chem & Energy Catalys, Key Lab Strongly Coupled Quantum Matter Phys,Anhu, Hefei Natl Lab Phys Sci Microscale,Chinese Acad S, Hefei 230026, Anhui, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 41期

关键词：

electrocatalysis; iridium diselenide; lithium intercalation; overall water splitting; OXYGEN EVOLUTION; HYDROGEN; NANOSHEETS; ELECTROLYSIS; CATALYST; OXIDES;

D O I：

10.1002/anie.201909369

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing bifunctional catalysts for both hydrogen and oxygen evolution reactions is a promising approach to the practical implementation of electrocatalytic water splitting. However, most of the reported bifunctional catalysts are only applicable to alkaline electrolyzer, although a few are effective in acidic or neutral media that appeals more to industrial applications. Here, a lithium-intercalated iridium diselenide (Li-IrSe2) is developed that outperformed other reported catalysts toward overall water splitting in both acidic and neutral environments. Li intercalation activated the inert pristine IrSe2 via bringing high porosities and abundant Se vacancies for efficient hydrogen and oxygen evolution reactions. When Li-IrSe2 was assembled into two-electrode electrolyzers for overall water splitting, the cell voltages at 10 mA cm(-2) were 1.44 and 1.50 V under pH 0 and 7, respectively, being record-low values in both conditions.

引用

页码：14764 / 14769

页数：6

共 42 条

[1]

Blasco-Ahicart M, 2018, NAT CHEM, V10, P24, DOI [10.1038/NCHEM.2874, 10.1038/nchem.2874]

[2] High resolution XPS studies of Se chemistry of a Cu(In, Ga)Se2 surface [J].