Layered-Double-Hydroxide Nanosheets as Efficient Visible-Light-Driven Photocatalysts for Dinitrogen Fixation

被引：512

作者：

Zhao, Yufei ^{[1
]}

Zhao, Yunxuan ^{[1
,2
,3
]}

Waterhouse, Geoffrey I. N. ^{[4
]}

Zheng, Lirong ^{[5
]}

Cao, Xingzong ^{[5
]}

Teng, Fei ^{[3
]}

Wu, Li-Zhu ^{[1
]}

Tung, Chen-Ho ^{[1
]}

O'Hare, Dermot ^{[6
]}

Zhang, Tierui ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Photochem Convers & Optoelect Mat, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 100084, Jiangsu, Peoples R China

[4] Univ Auckland, Sch Chem Sci, Auckland 1142, New Zealand

[5] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[6] Univ Oxford, Dept Chem, Chem Res Lab, Mansfield Rd, Oxford OX1 3TA, England

来源：

ADVANCED MATERIALS | 2017年 / 29卷 / 42期

基金：

中国国家自然科学基金;

关键词：

layered double hydroxides; N-2; photofixation; photocatalysts; strain effect; ultrathin nanosheets; NITROGEN-FIXATION; MESOPOROUS SILICA; AMMONIA-SYNTHESIS; TITANIUM-DIOXIDE; OXYGEN EVOLUTION; WATER; OXIDE; CONVERSION; REDUCTION; SPECTROSCOPY;

D O I：

10.1002/adma.201703828

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Semiconductor photocatalysis attracts widespread interest in water splitting, CO2 reduction, and N-2 fixation. N-2 reduction to NH3 is essential to the chemical industry and to the Earth's nitrogen cycle. Industrially, NH3 is synthesized by the Haber-Bosch process under extreme conditions (400-500 degrees C, 200-250 bar), stimulating research into the development of sustainable technologies for NH3 production. Herein, this study demonstrates that ultrathin layered-double-hydroxide (LDH) photocatalysts, in particular CuCr-LDH nanosheets, possess remarkable photocatalytic activity for the photoreduction of N-2 to NH3 in water at 25 degrees C under visible-light irradiation. The excellent activity can be attributed to the severely distorted structure and compressive strain in the LDH nanosheets, which significantly enhances N-2 chemisorption and thereby promotes NH3 formation.

引用

页数：10

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