A simple procedure was developed to prepare cobalt oxide nanoparticles (nano-CoOx) on multiwall carbon nanotube-modified glassy carbon electrode (MWNT/GCE). Scanning electron microscopy revealed the electrodeposition of nano-CoOx with an average particle size of 25 nm onto MWNT/GCE. Also, the presence of nano-CoOx was revealed by energy dispersive X-ray spectra. The electrocatalytic activity of nano-CoOx and MWNT composite-modified GCE (CoOx–MWNT/GCE) has been examined towards the oxygen evolution reaction (OER) by linear sweep voltammetry. The OER is significantly enhanced at CoOx–MWNT/GCE, as demonstrated by a negative shift in the polarization curves at the CoOx–MWNT/GCE compared with that obtained at the CoOx–GCE and GCE. Optimization of the operating experimental conditions (i.e., solution pH and loading level of nano-CoOx) has been achieved to maximize the electrocatalytic activity of CoOx–MWNT/GCE. The maximum electrocatalytic activity towards the OER was obtained in alkaline media (pH = 13). The electrocatalytic activity of CoOx–MWNT/GCE increased with the number of potential cycles employed for the CoOx deposition till a certain loading (20 cycles) beyond which an adverse effect is observed. The fabricated CoOx–MWNT/GCE exhibited a good stability and durability. The value of energy saving per gram of oxygen gas at a current density of 10 mA cm−2 is 19 .3 kWh kg−1.
机构:
Wuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2V4, CanadaWuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
Liu, Yuxi
Chen, Gang
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Wuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R ChinaWuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
Chen, Gang
Tian, Chong
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Wuhan Univ, Dept Power & Mech Engn, Wuhan, Hubei, Peoples R ChinaWuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
Tian, Chong
Gupta, Rajender
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Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2V4, CanadaWuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
Gupta, Rajender
Wang, Xiaogang
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Taiyuan Univ Sci & Technol, Heavy Machinery Engn Res Ctr, Coll Mat Sci & Engn, Educ Minist, Taiyuan 030024, Shanxi, Peoples R ChinaWuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
Wang, Xiaogang
Zeng, Hongbo
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Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2V4, CanadaWuhan Second Ship Design & Res Inst, Wuhan, Hubei, Peoples R China
机构:
Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Babar, P. T.
Lokhande, A. C.
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Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Lokhande, A. C.
Pawar, B. S.
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Dongguk Univ, Div Phys & Semicond Sci, Seoul 100715, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Pawar, B. S.
Gang, M. G.
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Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Gang, M. G.
Jo, Eunjin
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Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Jo, Eunjin
Go, Changsik
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Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Go, Changsik
Suryawanshi, M. P.
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Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
Suryawanshi, M. P.
Pawar, S. M.
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Dongguk Univ, Div Phys & Semicond Sci, Seoul 100715, South KoreaChonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, Gwangju 500757, South Korea
机构:
Bar Ilan Univ, Dept Chem, IL-5290002 Ramat Gan, Israel
Bar Ilan Univ, Bar Ilan Inst Nanotechnol & Adv Mat BINA, IL-5290002 Ramat Gan, IsraelBar Ilan Univ, Dept Chem, IL-5290002 Ramat Gan, Israel
Malik, Bibhudatta
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Sadhanala, Hari Krishna
Aziz, S. K. Tarik
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Bar Ilan Univ, Dept Chem, IL-5290002 Ramat Gan, Israel
Bar Ilan Univ, Bar Ilan Inst Nanotechnol & Adv Mat BINA, IL-5290002 Ramat Gan, IsraelBar Ilan Univ, Dept Chem, IL-5290002 Ramat Gan, Israel
Aziz, S. K. Tarik
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Majumder, Sumit
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Konar, Rajashree
Gedanken, Aharon
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Bar Ilan Univ, Dept Chem, IL-5290002 Ramat Gan, Israel
Bar Ilan Univ, Bar Ilan Inst Nanotechnol & Adv Mat BINA, IL-5290002 Ramat Gan, IsraelBar Ilan Univ, Dept Chem, IL-5290002 Ramat Gan, Israel