Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation

Heterogeneous catalysis often involves charge transfer between adsorbed molecules and the surface of catalyst, and thus their activity depends on the surface charge density. The efficiency of charge transfer could be optimized by adjusting the concentration of oxygen vacancies (O<sub>v</sub...

Full description

Bibliographic Details
Main Authors: Jun Zhou, Yue Zhang, Song Li, Jing Chen
Format: Article
Language:English
Published: MDPI AG 2019-11-01
Series:Catalysts
Subjects:
Online Access:https://www.mdpi.com/2073-4344/9/11/944
id doaj-7b69469402244e17891f8b32bc90e7eb
record_format Article
spelling doaj-7b69469402244e17891f8b32bc90e7eb2020-11-25T02:29:51ZengMDPI AGCatalysts2073-43442019-11-0191194410.3390/catal9110944catal9110944Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol HydrogenationJun Zhou0Yue Zhang1Song Li2Jing Chen3Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaKey Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaKey Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaInstitute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaHeterogeneous catalysis often involves charge transfer between adsorbed molecules and the surface of catalyst, and thus their activity depends on the surface charge density. The efficiency of charge transfer could be optimized by adjusting the concentration of oxygen vacancies (O<sub>v</sub>). In this work, hexagonal Ni(OH)<sub>2</sub> nanoparticles were initially synthesized by a hydrothermal process using aluminum powder as the sacrificial agent, and were then converted into 2D Ni/NiO nanocomposites through in situ reduction in hydrogen flow. The oxygen vacancy concentration in the NiO nanosheet could be well-controlled by adjusting the reduction temperature. This resulted in strikingly high activities for hydrogenation of nitrophenol. The Ni/NiO nanocomposite could easily be recovered by a magnetic field for reuse. The present finding is beneficial for producing better hydrogenation catalysts and paves the way for the design of highly efficient catalysts.https://www.mdpi.com/2073-4344/9/11/944metal-oxide interactionoxygen vacancyhydrogenationcatalyst
collection DOAJ
language English
format Article
sources DOAJ
author Jun Zhou
Yue Zhang
Song Li
Jing Chen
spellingShingle Jun Zhou
Yue Zhang
Song Li
Jing Chen
Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation
Catalysts
metal-oxide interaction
oxygen vacancy
hydrogenation
catalyst
author_facet Jun Zhou
Yue Zhang
Song Li
Jing Chen
author_sort Jun Zhou
title Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation
title_short Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation
title_full Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation
title_fullStr Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation
title_full_unstemmed Ni/NiO Nanocomposites with Rich Oxygen Vacancies as High-Performance Catalysts for Nitrophenol Hydrogenation
title_sort ni/nio nanocomposites with rich oxygen vacancies as high-performance catalysts for nitrophenol hydrogenation
publisher MDPI AG
series Catalysts
issn 2073-4344
publishDate 2019-11-01
description Heterogeneous catalysis often involves charge transfer between adsorbed molecules and the surface of catalyst, and thus their activity depends on the surface charge density. The efficiency of charge transfer could be optimized by adjusting the concentration of oxygen vacancies (O<sub>v</sub>). In this work, hexagonal Ni(OH)<sub>2</sub> nanoparticles were initially synthesized by a hydrothermal process using aluminum powder as the sacrificial agent, and were then converted into 2D Ni/NiO nanocomposites through in situ reduction in hydrogen flow. The oxygen vacancy concentration in the NiO nanosheet could be well-controlled by adjusting the reduction temperature. This resulted in strikingly high activities for hydrogenation of nitrophenol. The Ni/NiO nanocomposite could easily be recovered by a magnetic field for reuse. The present finding is beneficial for producing better hydrogenation catalysts and paves the way for the design of highly efficient catalysts.
topic metal-oxide interaction
oxygen vacancy
hydrogenation
catalyst
url https://www.mdpi.com/2073-4344/9/11/944
work_keys_str_mv AT junzhou ninionanocompositeswithrichoxygenvacanciesashighperformancecatalystsfornitrophenolhydrogenation
AT yuezhang ninionanocompositeswithrichoxygenvacanciesashighperformancecatalystsfornitrophenolhydrogenation
AT songli ninionanocompositeswithrichoxygenvacanciesashighperformancecatalystsfornitrophenolhydrogenation
AT jingchen ninionanocompositeswithrichoxygenvacanciesashighperformancecatalystsfornitrophenolhydrogenation
_version_ 1724831393044758528