Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol
Cu-Ni oxide nanocomposite was synthesized via solvothermal method with nickel (II) nitrate and copper nitrate as Ni and Cu resource respectively. AuNPs/oxide nanocomposite was obtained by dispersing the oxide into the pre-synthesized Au colloid. Transmission electron microscope (TEM) shows that the...
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Elsevier
2022-01-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221171562200025X |
| _version_ | 1828269740316950528 |
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| author | Han Sun Haiping Huang Chao Hu Yu Yan Yongmei Hu Shengda Guo Jing-Lin Chen |
| author_facet | Han Sun Haiping Huang Chao Hu Yu Yan Yongmei Hu Shengda Guo Jing-Lin Chen |
| author_sort | Han Sun |
| collection | DOAJ |
| description | Cu-Ni oxide nanocomposite was synthesized via solvothermal method with nickel (II) nitrate and copper nitrate as Ni and Cu resource respectively. AuNPs/oxide nanocomposite was obtained by dispersing the oxide into the pre-synthesized Au colloid. Transmission electron microscope (TEM) shows that the synthesized oxides are nanoplate morphology. Interplanar distance from the high resolution TEM (HRTEM) image shows that the Ni and Cu in the oxide are multivalent state. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterization further proves that the Ni and Cu are multivalent state, and the Au is Au0 form in the nanocomposte. EDS-mapping images confirm large numbers of AuNPs are uniformly absorbed onto the ultra-thin multivalent Cu-Ni oxide nanoplate. The electrochemical properties of multivalent oxide (m-v oxide) with or without AuNPs decoration are investigated in 0.1 M potassium chloride electrolyte with 2.0 mM Ferri/Ferro-Cyanide. When employed for the electrochemical catalysis in methanol oxidation reaction (MOR), the AuNPs/m-v oxide exhibits better electrochemistry performance than m-v oxide. The current density of AuNPs/m-v oxide (21.1 mA/cm2) is 3.4 times bigger than that of m-v oxide/GCE (6.2 mA/cm2). What’s more, it shows good electrochemical stability and lower slope of the Tafel plot (41.87 mV/dec). |
| first_indexed | 2024-04-13T05:34:06Z |
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| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-04-13T05:34:06Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-91c63065e08448468c155ba7a0cacb142022-12-22T03:00:21ZengElsevierResults in Chemistry2211-71562022-01-014100306Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanolHan Sun0Haiping Huang1Chao Hu2Yu Yan3Yongmei Hu4Shengda Guo5Jing-Lin Chen6School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaCorresponding author.; School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, PR ChinaCu-Ni oxide nanocomposite was synthesized via solvothermal method with nickel (II) nitrate and copper nitrate as Ni and Cu resource respectively. AuNPs/oxide nanocomposite was obtained by dispersing the oxide into the pre-synthesized Au colloid. Transmission electron microscope (TEM) shows that the synthesized oxides are nanoplate morphology. Interplanar distance from the high resolution TEM (HRTEM) image shows that the Ni and Cu in the oxide are multivalent state. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterization further proves that the Ni and Cu are multivalent state, and the Au is Au0 form in the nanocomposte. EDS-mapping images confirm large numbers of AuNPs are uniformly absorbed onto the ultra-thin multivalent Cu-Ni oxide nanoplate. The electrochemical properties of multivalent oxide (m-v oxide) with or without AuNPs decoration are investigated in 0.1 M potassium chloride electrolyte with 2.0 mM Ferri/Ferro-Cyanide. When employed for the electrochemical catalysis in methanol oxidation reaction (MOR), the AuNPs/m-v oxide exhibits better electrochemistry performance than m-v oxide. The current density of AuNPs/m-v oxide (21.1 mA/cm2) is 3.4 times bigger than that of m-v oxide/GCE (6.2 mA/cm2). What’s more, it shows good electrochemical stability and lower slope of the Tafel plot (41.87 mV/dec).http://www.sciencedirect.com/science/article/pii/S221171562200025XCu-Ni oxideMulti-valenceMethanol oxidation reactionElectrochemical catalysis |
| spellingShingle | Han Sun Haiping Huang Chao Hu Yu Yan Yongmei Hu Shengda Guo Jing-Lin Chen Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol Results in Chemistry Cu-Ni oxide Multi-valence Methanol oxidation reaction Electrochemical catalysis |
| title | Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol |
| title_full | Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol |
| title_fullStr | Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol |
| title_full_unstemmed | Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol |
| title_short | Synthesis of AuNPs decorated multi-valent Cu-Ni oxide nanoplates for electrochemical oxidation of methanol |
| title_sort | synthesis of aunps decorated multi valent cu ni oxide nanoplates for electrochemical oxidation of methanol |
| topic | Cu-Ni oxide Multi-valence Methanol oxidation reaction Electrochemical catalysis |
| url | http://www.sciencedirect.com/science/article/pii/S221171562200025X |
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