Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization
Electrochemical oxidation/reduction of radicals is a green and environmentally friendly approach to generating fuels. These reactions, however, suffer from sluggish kinetics due to a low local concentration of radicals around the electrocatalyst. A large applied electrode potential can enhance the f...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Institue of Optics and Electronics, Chinese Academy of Sciences
2022-11-01
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| Series: | Opto-Electronic Advances |
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| Online Access: | https://www.oejournal.org/article/doi/10.29026/oea.2022.210105 |
| _version_ | 1811205702284214272 |
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| author | Chaudry Sajed Saraj Subhash C. Singh Gopal Verma Rahul A Rajan Wei Li Chunlei Guo |
| author_facet | Chaudry Sajed Saraj Subhash C. Singh Gopal Verma Rahul A Rajan Wei Li Chunlei Guo |
| author_sort | Chaudry Sajed Saraj |
| collection | DOAJ |
| description | Electrochemical oxidation/reduction of radicals is a green and environmentally friendly approach to generating fuels. These reactions, however, suffer from sluggish kinetics due to a low local concentration of radicals around the electrocatalyst. A large applied electrode potential can enhance the fuel generation efficiency via enhancing the radical concentration around the electrocatalyst sites, but this comes at the cost of electricity. Here, we report about a ~45% saving in energy to achieve an electrochemical hydrogen generation rate of 3×1016 molecules cm–2s–1 (current density: 10 mA/cm2) through localized electric field-induced enhancement in the reagent concentration (LEFIRC) at laser-induced periodic surface structured (LIPSS) electrodes. The finite element model is used to simulate the spatial distribution of the electric field to understand the effects of LIPSS geometric parameters in field localization. When the LIPSS patterned electrodes are used as substrates to support Pt/C and RuO2 electrocatalysts, the η10 overpotentials for HER and OER are decreased by 40.4 and 25%, respectively. Moreover, the capability of the LIPSS-patterned electrodes to operate at significantly reduced energy is also demonstrated in a range of electrolytes, including alkaline, acidic, neutral, and seawater. Importantly, when two LIPSS patterned electrodes were assembled as the anode and cathode into a cell, it requires 330 mVs of lower electric potential with enhanced stability over a similar cell made of pristine electrodes to drive a current density of 10 mA/cm2. This work demonstrates a physical and versatile approach of electrode surface patterning to boost electrocatalytic fuel generation performance and can be applied to any metal and semiconductor catalysts for a range of electrochemical reactions. |
| first_indexed | 2024-04-12T03:36:25Z |
| format | Article |
| id | doaj.art-43110474327947a5ac129dcdf416c51a |
| institution | Directory Open Access Journal |
| issn | 2096-4579 |
| language | English |
| last_indexed | 2024-04-12T03:36:25Z |
| publishDate | 2022-11-01 |
| publisher | Institue of Optics and Electronics, Chinese Academy of Sciences |
| record_format | Article |
| series | Opto-Electronic Advances |
| spelling | doaj.art-43110474327947a5ac129dcdf416c51a2022-12-22T03:49:25ZengInstitue of Optics and Electronics, Chinese Academy of SciencesOpto-Electronic Advances2096-45792022-11-0151111610.29026/oea.2022.210105oea-2021-0105-guochunleiLaser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localizationChaudry Sajed Saraj0Subhash C. Singh1Gopal Verma2Rahul A Rajan3Wei Li4Chunlei Guo5GPL Photonics Lab, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaGPL Photonics Lab, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaGPL Photonics Lab, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaGPL Photonics Lab, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaGPL Photonics Lab, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaThe Institute of Optics, University of Rochester, Rochester, NY 14627, USAElectrochemical oxidation/reduction of radicals is a green and environmentally friendly approach to generating fuels. These reactions, however, suffer from sluggish kinetics due to a low local concentration of radicals around the electrocatalyst. A large applied electrode potential can enhance the fuel generation efficiency via enhancing the radical concentration around the electrocatalyst sites, but this comes at the cost of electricity. Here, we report about a ~45% saving in energy to achieve an electrochemical hydrogen generation rate of 3×1016 molecules cm–2s–1 (current density: 10 mA/cm2) through localized electric field-induced enhancement in the reagent concentration (LEFIRC) at laser-induced periodic surface structured (LIPSS) electrodes. The finite element model is used to simulate the spatial distribution of the electric field to understand the effects of LIPSS geometric parameters in field localization. When the LIPSS patterned electrodes are used as substrates to support Pt/C and RuO2 electrocatalysts, the η10 overpotentials for HER and OER are decreased by 40.4 and 25%, respectively. Moreover, the capability of the LIPSS-patterned electrodes to operate at significantly reduced energy is also demonstrated in a range of electrolytes, including alkaline, acidic, neutral, and seawater. Importantly, when two LIPSS patterned electrodes were assembled as the anode and cathode into a cell, it requires 330 mVs of lower electric potential with enhanced stability over a similar cell made of pristine electrodes to drive a current density of 10 mA/cm2. This work demonstrates a physical and versatile approach of electrode surface patterning to boost electrocatalytic fuel generation performance and can be applied to any metal and semiconductor catalysts for a range of electrochemical reactions.https://www.oejournal.org/article/doi/10.29026/oea.2022.210105electric field localizationhotspot formationlaser-induced periodic surface structureselectrochemical fuel generationoverall water splitting |
| spellingShingle | Chaudry Sajed Saraj Subhash C. Singh Gopal Verma Rahul A Rajan Wei Li Chunlei Guo Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization Opto-Electronic Advances electric field localization hotspot formation laser-induced periodic surface structures electrochemical fuel generation overall water splitting |
| title | Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization |
| title_full | Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization |
| title_fullStr | Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization |
| title_full_unstemmed | Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization |
| title_short | Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization |
| title_sort | laser induced periodic surface structured electrodes with 45 energy saving in electrochemical fuel generation through field localization |
| topic | electric field localization hotspot formation laser-induced periodic surface structures electrochemical fuel generation overall water splitting |
| url | https://www.oejournal.org/article/doi/10.29026/oea.2022.210105 |
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