Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media
Precious non-noble metals have been constantly attracting research attention in order to realize an inexpensive, extra active and more stable electrocatalysts in terms of various oxidation states and structures for their applications in oxidation (splitting) of water. In the present work graphene ox...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-03-01
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| Series: | Arabian Journal of Chemistry |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535219301145 |
| _version_ | 1818437412313890816 |
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| author | Siva Prasad Mooni Kiran Kumar Kondamareddy Sunling Li Xin Zhou Liu Chang Xia Ke Xiaoqiang Yang Dan Li Qing Qu |
| author_facet | Siva Prasad Mooni Kiran Kumar Kondamareddy Sunling Li Xin Zhou Liu Chang Xia Ke Xiaoqiang Yang Dan Li Qing Qu |
| author_sort | Siva Prasad Mooni |
| collection | DOAJ |
| description | Precious non-noble metals have been constantly attracting research attention in order to realize an inexpensive, extra active and more stable electrocatalysts in terms of various oxidation states and structures for their applications in oxidation (splitting) of water. In the present work graphene oxide incorporated, MnO2-NiO composite metal oxide nanoflakes were synthesized on the stainless steel substrate using efficient electrodeposition route in alkaline media and drop casting method with further annealing treatment at 400 °C for 4 h. Initially MnO2-NiO nanoflakes were deposited using different cyclic sweep rates, later graphene oxide suspension was drop casted on the MnO2-NiO nanoflakes and subsequently subjected to annealing at 200 °C for 2 h. The prepared electrode material is denoted as GO/MnO2-NiO/SS and used as an electrocatalyst for oxygen evolution. Field emission scanning electron microscopy, transmission electron microscopy, Energy dispersive electron spectroscopy and X-ray diffraction spectroscopy were used to study the crystalline nature and morphologies of the deposited films. The electrochemical properties of the electrode material were investigated using cyclic voltammetry and linear sweep voltammetry. The electrode exhibits low overpotential and small Tafel slope of 379 mV and 47.84 mVdec−1 at the current density of 10 mA cm−2 in alkaline (KOH) medium. In addition, the electrode shows a long time stability of 28800 s. Hence, the present study suggests that the GO incorporated Mn-Ni bimetal oxide modified electrode is suitable electrode material for oxygen evolution reaction (OER), owing to its facile preparation, inexpensive, easy handling and high active nature. Keywords: MnO2, NiO, Graphene oxide, Electrodeposition, Alkaline solution, Annealing, OER |
| first_indexed | 2024-12-14T17:24:16Z |
| format | Article |
| id | doaj.art-f45d985ca985447b981739ac9a6fe243 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-14T17:24:16Z |
| publishDate | 2020-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-f45d985ca985447b981739ac9a6fe2432022-12-21T22:53:16ZengElsevierArabian Journal of Chemistry1878-53522020-03-0113345534563Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline mediaSiva Prasad Mooni0Kiran Kumar Kondamareddy1Sunling Li2Xin Zhou3Liu Chang4Xia Ke5Xiaoqiang Yang6Dan Li7Qing Qu8School of Chemical Science and Technology, Yunnan University, Kunming 650091, ChinaDepartment of Physics, School of Pure Sciences, College of Engineering Science and Technology, FIJI National University, Natabua Campus, Lautoka 5529, FijiSchool of Chemical Science and Technology, Yunnan University, Kunming 650091, ChinaSchool of Chemical Science and Technology, Yunnan University, Kunming 650091, ChinaSchool of Chemical Science and Technology, Yunnan University, Kunming 650091, ChinaSchool of Chemical Science and Technology, Yunnan University, Kunming 650091, ChinaSchool of Chemical Science and Technology, Yunnan University, Kunming 650091, ChinaThe State Key Laboratory for Refractories and Metallurgy, School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Chemical Science and Technology, Yunnan University, Kunming 650091, China; Corresponding author.Precious non-noble metals have been constantly attracting research attention in order to realize an inexpensive, extra active and more stable electrocatalysts in terms of various oxidation states and structures for their applications in oxidation (splitting) of water. In the present work graphene oxide incorporated, MnO2-NiO composite metal oxide nanoflakes were synthesized on the stainless steel substrate using efficient electrodeposition route in alkaline media and drop casting method with further annealing treatment at 400 °C for 4 h. Initially MnO2-NiO nanoflakes were deposited using different cyclic sweep rates, later graphene oxide suspension was drop casted on the MnO2-NiO nanoflakes and subsequently subjected to annealing at 200 °C for 2 h. The prepared electrode material is denoted as GO/MnO2-NiO/SS and used as an electrocatalyst for oxygen evolution. Field emission scanning electron microscopy, transmission electron microscopy, Energy dispersive electron spectroscopy and X-ray diffraction spectroscopy were used to study the crystalline nature and morphologies of the deposited films. The electrochemical properties of the electrode material were investigated using cyclic voltammetry and linear sweep voltammetry. The electrode exhibits low overpotential and small Tafel slope of 379 mV and 47.84 mVdec−1 at the current density of 10 mA cm−2 in alkaline (KOH) medium. In addition, the electrode shows a long time stability of 28800 s. Hence, the present study suggests that the GO incorporated Mn-Ni bimetal oxide modified electrode is suitable electrode material for oxygen evolution reaction (OER), owing to its facile preparation, inexpensive, easy handling and high active nature. Keywords: MnO2, NiO, Graphene oxide, Electrodeposition, Alkaline solution, Annealing, OERhttp://www.sciencedirect.com/science/article/pii/S1878535219301145 |
| spellingShingle | Siva Prasad Mooni Kiran Kumar Kondamareddy Sunling Li Xin Zhou Liu Chang Xia Ke Xiaoqiang Yang Dan Li Qing Qu Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media Arabian Journal of Chemistry |
| title | Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media |
| title_full | Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media |
| title_fullStr | Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media |
| title_full_unstemmed | Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media |
| title_short | Graphene oxide decorated bimetal (MnNi) oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media |
| title_sort | graphene oxide decorated bimetal mnni oxide nanoflakes used as an electrocatalyst for enhanced oxygen evolution reaction in alkaline media |
| url | http://www.sciencedirect.com/science/article/pii/S1878535219301145 |
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