Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid
This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/85617 http://hdl.handle.net/10220/43774 |
| _version_ | 1826127155172474880 |
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| author | Ager III, Joel W. Xu, Zhichuan Jason Wang, Ying Sun, Yuanmiao Liao, Hanbin Sun, Shengnan Li, Shuzhou |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Ager III, Joel W. Xu, Zhichuan Jason Wang, Ying Sun, Yuanmiao Liao, Hanbin Sun, Shengnan Li, Shuzhou |
| author_sort | Ager III, Joel W. |
| collection | NTU |
| description | This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region. |
| first_indexed | 2024-10-01T07:04:09Z |
| format | Journal Article |
| id | ntu-10356/85617 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:04:09Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/856172021-01-05T06:36:57Z Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid Ager III, Joel W. Xu, Zhichuan Jason Wang, Ying Sun, Yuanmiao Liao, Hanbin Sun, Shengnan Li, Shuzhou School of Materials Science & Engineering Energy Research Institute @ NTU (ERI@N) Electrocatalysis Gold This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) 2017-09-20T07:48:45Z 2019-12-06T16:07:11Z 2017-09-20T07:48:45Z 2019-12-06T16:07:11Z 2016 Journal Article Wang, Y., Sun, Y., Liao, H., Sun, S., Li, S., Ager III, J. W., et al. (2016). Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid. Electrochimica Acta, 209, 440-447. 0013-4686 https://hdl.handle.net/10356/85617 http://hdl.handle.net/10220/43774 10.1016/j.electacta.2016.05.095 en Electrochimica Acta © 2016 Elsevier Ltd. |
| spellingShingle | Electrocatalysis Gold Ager III, Joel W. Xu, Zhichuan Jason Wang, Ying Sun, Yuanmiao Liao, Hanbin Sun, Shengnan Li, Shuzhou Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid |
| title | Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid |
| title_full | Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid |
| title_fullStr | Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid |
| title_full_unstemmed | Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid |
| title_short | Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid |
| title_sort | activation effect of electrochemical cycling on gold nanoparticles towards the hydrogen evolution reaction in sulfuric acid |
| topic | Electrocatalysis Gold |
| url | https://hdl.handle.net/10356/85617 http://hdl.handle.net/10220/43774 |
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