Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds
To improve the activities of non-noble metal catalysts is highly desirable and valuable to the reduced use of noble metal resources. In this work, the supported nickel (Ni) and nickel-platinum (NiPt) nanocatalysts were derived from a layered double hydroxide/carbon composite precursor. The catalysts...
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doaj-b746b23a34c8437ead1b0ee524c18b062020-11-24T20:44:31ZengMDPI AGNanomaterials2079-49912016-06-016610310.3390/nano6060103nano6060103Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro CompoundsHuishan Shang0Kecheng Pan1Lu Zhang2Bing Zhang3Xu Xiang4State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaState Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaTo improve the activities of non-noble metal catalysts is highly desirable and valuable to the reduced use of noble metal resources. In this work, the supported nickel (Ni) and nickel-platinum (NiPt) nanocatalysts were derived from a layered double hydroxide/carbon composite precursor. The catalysts were characterized and the role of Pt was analysed using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDS) mapping, and X-ray photoelectron spectroscopy (XPS) techniques. The Ni2+ was reduced to metallic Ni0 via a self-reduction way utilizing the carbon as a reducing agent. The average sizes of the Ni particles in the NiPt catalysts were smaller than that in the supported Ni catalyst. The electronic structure of Ni was affected by the incorporation of Pt. The optimal NiPt catalysts exhibited remarkably improved activity toward the reduction of nitrophenol, which has an apparent rate constant (Ka) of 18.82 × 10−3 s−1, 6.2 times larger than that of Ni catalyst and also larger than most of the reported values of noble-metal and bimetallic catalysts. The enhanced activity could be ascribed to the modification to the electronic structure of Ni by Pt and the effect of exposed crystal planes.http://www.mdpi.com/2079-4991/6/6/103supported catalystsheterogeneous catalysisnickelplatinumreduction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Huishan Shang Kecheng Pan Lu Zhang Bing Zhang Xu Xiang |
spellingShingle |
Huishan Shang Kecheng Pan Lu Zhang Bing Zhang Xu Xiang Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds Nanomaterials supported catalysts heterogeneous catalysis nickel platinum reduction |
author_facet |
Huishan Shang Kecheng Pan Lu Zhang Bing Zhang Xu Xiang |
author_sort |
Huishan Shang |
title |
Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds |
title_short |
Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds |
title_full |
Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds |
title_fullStr |
Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds |
title_full_unstemmed |
Enhanced Activity of Supported Ni Catalysts Promoted by Pt for Rapid Reduction of Aromatic Nitro Compounds |
title_sort |
enhanced activity of supported ni catalysts promoted by pt for rapid reduction of aromatic nitro compounds |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2016-06-01 |
description |
To improve the activities of non-noble metal catalysts is highly desirable and valuable to the reduced use of noble metal resources. In this work, the supported nickel (Ni) and nickel-platinum (NiPt) nanocatalysts were derived from a layered double hydroxide/carbon composite precursor. The catalysts were characterized and the role of Pt was analysed using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDS) mapping, and X-ray photoelectron spectroscopy (XPS) techniques. The Ni2+ was reduced to metallic Ni0 via a self-reduction way utilizing the carbon as a reducing agent. The average sizes of the Ni particles in the NiPt catalysts were smaller than that in the supported Ni catalyst. The electronic structure of Ni was affected by the incorporation of Pt. The optimal NiPt catalysts exhibited remarkably improved activity toward the reduction of nitrophenol, which has an apparent rate constant (Ka) of 18.82 × 10−3 s−1, 6.2 times larger than that of Ni catalyst and also larger than most of the reported values of noble-metal and bimetallic catalysts. The enhanced activity could be ascribed to the modification to the electronic structure of Ni by Pt and the effect of exposed crystal planes. |
topic |
supported catalysts heterogeneous catalysis nickel platinum reduction |
url |
http://www.mdpi.com/2079-4991/6/6/103 |
work_keys_str_mv |
AT huishanshang enhancedactivityofsupportednicatalystspromotedbyptforrapidreductionofaromaticnitrocompounds AT kechengpan enhancedactivityofsupportednicatalystspromotedbyptforrapidreductionofaromaticnitrocompounds AT luzhang enhancedactivityofsupportednicatalystspromotedbyptforrapidreductionofaromaticnitrocompounds AT bingzhang enhancedactivityofsupportednicatalystspromotedbyptforrapidreductionofaromaticnitrocompounds AT xuxiang enhancedactivityofsupportednicatalystspromotedbyptforrapidreductionofaromaticnitrocompounds |
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1716817100370083840 |