Layered-Double-Hydroxide Nanosheets as Efficient Visible-Light-Driven Photocatalysts for Dinitrogen Fixation
Layered-Double-Hydroxide Nanosheets as Efficient Visible-Light-Driven Photocatalysts for Dinitrogen Fixation
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层状双氢氧化物纳米片作为有效的可见光驱动光催化剂用于固氮
DOI：
10.1002/adma.201703828
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发表时间：
2017
影响因子：
29.4
通讯作者：
Tierui Zhang
中科院分区：
文献类型：
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作者：
Yufei Zhao;Yunxuan Zhao;Geoffrey I. N. Waterhouse;Lirong Zheng;Xingzong Cao;Fei Teng;Li-Zhu Wu;Chen-Ho Tung;Dermot O’Hare;Tierui Zhang
半导体光催化在分解水、还原二氧化碳和固定氮气等方面引起了人们的广泛兴趣。N2还原为NH3对化学工业和地球氮循环都是至关重要的。在工业上，NH3是在极端条件下(400-500°C，200-250bar)通过Haber-Bosch工艺合成的，这促进了对NH3生产可持续技术开发的研究。本研究表明，在可见光照射下，超薄层状双氢氧化物(LDH)光催化剂，尤其是CuCrLDH纳米片，在25℃的可见光照射下，对水中N2光还原为NH3具有显著的光催化活性。这种优异的活性可以归因于LDH纳米片的严重扭曲结构和压缩应变，它显著地增强了对N2的化学吸附，从而促进了NH3的形成。
Semiconductor photocatalysis attracts widespread interest in water splitting, CO2reduction, and N2fixation. N2reduction to NH3is essential to the chemical industry and to the Earth's nitrogen cycle. Industrially, NH3is synthesized by the Haber–Bosch process under extreme conditions (400–500 °C, 200–250 bar), stimulating research into the development of sustainable technologies for NH3production. Herein, this study demonstrates that ultrathin layered‐double‐hydroxide (LDH) photocatalysts, in particular CuCr‐LDH nanosheets, possess remarkable photocatalytic activity for the photoreduction of N2to NH3in water at 25 °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 N2chemisorption and thereby promotes NH3formation.