Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis
Abstract Water electrolysis is considered one of the major sources of green hydrogen as the fuel of the future. However, due to limited freshwater resources, more interest has been geared toward seawater electrolysis for hydrogen production. The development of effective and selective electrocatalyst...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-46292-9 |
| _version_ | 1827603649237352448 |
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| author | Zafar Khan Ghouri David James Hughes Khalid Ahmed Khaled Elsaid Mohamed Mahmoud Nasef Ahmed Badreldin Ahmed Abdel-Wahab |
| author_facet | Zafar Khan Ghouri David James Hughes Khalid Ahmed Khaled Elsaid Mohamed Mahmoud Nasef Ahmed Badreldin Ahmed Abdel-Wahab |
| author_sort | Zafar Khan Ghouri |
| collection | DOAJ |
| description | Abstract Water electrolysis is considered one of the major sources of green hydrogen as the fuel of the future. However, due to limited freshwater resources, more interest has been geared toward seawater electrolysis for hydrogen production. The development of effective and selective electrocatalysts from earth-abundant elements for oxygen evolution reaction (OER) as the bottleneck for seawater electrolysis is highly desirable. This work introduces novel Pd-doped Co nanoparticles encapsulated in graphite carbon shell electrode (Pd-doped CoNPs@C shell) as a highly active OER electrocatalyst towards alkaline seawater oxidation, which outperforms the state-of-the-art catalyst, RuO2. Significantly, Pd-doped CoNPs@C shell electrode exhibiting low OER overpotential of ≈213, ≈372, and ≈ 429 mV at 10, 50, and 100 mA/cm2, respectively together with a small Tafel slope of ≈ 120 mV/dec than pure Co@C and Pd@C electrode in alkaline seawater media. The high catalytic activity at the aforementioned current density reveals decent selectivity, thus obviating the evolution of chloride reaction (CER), i.e., ∼490 mV, as competitive to the OER. Results indicated that Pd-doped Co nanoparticles encapsulated in graphite carbon shell (Pd-doped CoNPs@C electrode) could be a very promising candidate for seawater electrolysis. |
| first_indexed | 2024-03-09T05:43:40Z |
| format | Article |
| id | doaj.art-ebb607558b08430c93108b465a9470ea |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T05:43:40Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-ebb607558b08430c93108b465a9470ea2023-12-03T12:23:37ZengNature PortfolioScientific Reports2045-23222023-11-0113111110.1038/s41598-023-46292-9Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysisZafar Khan Ghouri0David James Hughes1Khalid Ahmed2Khaled Elsaid3Mohamed Mahmoud Nasef4Ahmed Badreldin5Ahmed Abdel-Wahab6School of Computing, Engineering and Digital Technologies, Teesside UniversitySchool of Computing, Engineering and Digital Technologies, Teesside UniversityInternational Center for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of KarachiChemical Engineering Program, Texas A&M University at QatarCenter of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi MalaysiaChemical Engineering Program, Texas A&M University at QatarChemical Engineering Program, Texas A&M University at QatarAbstract Water electrolysis is considered one of the major sources of green hydrogen as the fuel of the future. However, due to limited freshwater resources, more interest has been geared toward seawater electrolysis for hydrogen production. The development of effective and selective electrocatalysts from earth-abundant elements for oxygen evolution reaction (OER) as the bottleneck for seawater electrolysis is highly desirable. This work introduces novel Pd-doped Co nanoparticles encapsulated in graphite carbon shell electrode (Pd-doped CoNPs@C shell) as a highly active OER electrocatalyst towards alkaline seawater oxidation, which outperforms the state-of-the-art catalyst, RuO2. Significantly, Pd-doped CoNPs@C shell electrode exhibiting low OER overpotential of ≈213, ≈372, and ≈ 429 mV at 10, 50, and 100 mA/cm2, respectively together with a small Tafel slope of ≈ 120 mV/dec than pure Co@C and Pd@C electrode in alkaline seawater media. The high catalytic activity at the aforementioned current density reveals decent selectivity, thus obviating the evolution of chloride reaction (CER), i.e., ∼490 mV, as competitive to the OER. Results indicated that Pd-doped Co nanoparticles encapsulated in graphite carbon shell (Pd-doped CoNPs@C electrode) could be a very promising candidate for seawater electrolysis.https://doi.org/10.1038/s41598-023-46292-9 |
| spellingShingle | Zafar Khan Ghouri David James Hughes Khalid Ahmed Khaled Elsaid Mohamed Mahmoud Nasef Ahmed Badreldin Ahmed Abdel-Wahab Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis Scientific Reports |
| title | Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis |
| title_full | Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis |
| title_fullStr | Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis |
| title_full_unstemmed | Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis |
| title_short | Nanoengineered, Pd-doped Co@C nanoparticles as an effective electrocatalyst for OER in alkaline seawater electrolysis |
| title_sort | nanoengineered pd doped co c nanoparticles as an effective electrocatalyst for oer in alkaline seawater electrolysis |
| url | https://doi.org/10.1038/s41598-023-46292-9 |
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