Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline
This article presents a systematic study on the composition dependence of Ni-Co oxides (NCOs) on their electrocatalytic activities toward ethylene glycol (EG) and ethanol (EtOH) oxidation. NCO electrodes were prepared by co-electrodeposition method followed by annealing in air. The atomic ratios of...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2019
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| Online Access: | https://hdl.handle.net/10356/87279 http://hdl.handle.net/10220/48208 |
| _version_ | 1811681508082057216 |
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| author | Xu, Zhichuan J. Sun, Shengnan Zhou, Ye Hu, Benlin Zhang, Qichun |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Xu, Zhichuan J. Sun, Shengnan Zhou, Ye Hu, Benlin Zhang, Qichun |
| author_sort | Xu, Zhichuan J. |
| collection | NTU |
| description | This article presents a systematic study on the composition dependence of Ni-Co oxides (NCOs) on their electrocatalytic activities toward ethylene glycol (EG) and ethanol (EtOH) oxidation. NCO electrodes were prepared by co-electrodeposition method followed by annealing in air. The atomic ratios of Ni / (Ni + Co) (Ni content) in NCOs were controlled by adjusting the concentration ratio of Ni and Co precursors. As the Ni content increased, the phase of materials changed from the spinel to the mixture of spinel and rock salt. The electrocatalytic activities of these NCOs toward EG and EtOH oxidation were investigated by cyclic voltammetry, differential pulse voltammetry, multi-step chronoamperometry, and electrochemical impedance spectroscopy techniques. It was found that the performance of NCOs for EG and EtOH oxidation exhibited a firstly-increase-then-decrease trend with the increase of Ni content and the best performance was found at 46% Ni. The presence of Ni probably can facilitate EG and EtOH oxidation. Increasing the concentration of reactants or pH can improve the reaction rates. The products from EG and EtOH oxidation were analyzed by nuclear magnetic resonance, which indicated that the oxidation reaction was a process from hydroxyl group to carboxyl group. |
| first_indexed | 2024-10-01T03:42:03Z |
| format | Journal Article |
| id | ntu-10356/87279 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:42:03Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/872792023-07-14T15:51:04Z Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline Xu, Zhichuan J. Sun, Shengnan Zhou, Ye Hu, Benlin Zhang, Qichun School of Materials Science & Engineering Solar Fuel Laboratory Energy Research Institute @ NTU (ERI@N) Ethanol Oxides DRNTU::Engineering::Materials This article presents a systematic study on the composition dependence of Ni-Co oxides (NCOs) on their electrocatalytic activities toward ethylene glycol (EG) and ethanol (EtOH) oxidation. NCO electrodes were prepared by co-electrodeposition method followed by annealing in air. The atomic ratios of Ni / (Ni + Co) (Ni content) in NCOs were controlled by adjusting the concentration ratio of Ni and Co precursors. As the Ni content increased, the phase of materials changed from the spinel to the mixture of spinel and rock salt. The electrocatalytic activities of these NCOs toward EG and EtOH oxidation were investigated by cyclic voltammetry, differential pulse voltammetry, multi-step chronoamperometry, and electrochemical impedance spectroscopy techniques. It was found that the performance of NCOs for EG and EtOH oxidation exhibited a firstly-increase-then-decrease trend with the increase of Ni content and the best performance was found at 46% Ni. The presence of Ni probably can facilitate EG and EtOH oxidation. Increasing the concentration of reactants or pH can improve the reaction rates. The products from EG and EtOH oxidation were analyzed by nuclear magnetic resonance, which indicated that the oxidation reaction was a process from hydroxyl group to carboxyl group. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2019-05-15T04:53:37Z 2019-12-06T16:38:47Z 2019-05-15T04:53:37Z 2019-12-06T16:38:47Z 2015 Journal Article Sun, S., Zhou, Y., Hu, B., Zhang, Q., & Xu, Z. J. (2016). Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline. Journal of The Electrochemical Society, 163(2), H99-H104. doi:10.1149/2.0761602jes 0013-4651 https://hdl.handle.net/10356/87279 http://hdl.handle.net/10220/48208 10.1149/2.0761602jes en Journal of The Electrochemical Society © 2015 The Electrochemical Society. All rights reserved. This paper was published in Journal of the Electrochemical Society and is made available with permission of The Electrochemical Society. 6 p. application/pdf |
| spellingShingle | Ethanol Oxides DRNTU::Engineering::Materials Xu, Zhichuan J. Sun, Shengnan Zhou, Ye Hu, Benlin Zhang, Qichun Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline |
| title | Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline |
| title_full | Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline |
| title_fullStr | Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline |
| title_full_unstemmed | Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline |
| title_short | Ethylene glycol and ethanol oxidation on spinel ni-co oxides in alkaline |
| title_sort | ethylene glycol and ethanol oxidation on spinel ni co oxides in alkaline |
| topic | Ethanol Oxides DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/87279 http://hdl.handle.net/10220/48208 |
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