Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations
Abstract Direct alcohol fuel cells (DAFCs) face several challenges such as carbon support corrosion, poor kinetics, and long‐term stability, requiring improved electrocatalyst support development. We synthesized 5 %Pd/fMC−NiO using a microwave‐assisted sodium borohydride‐enhanced polyol method. X‐ra...
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| Format: | Article |
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Wiley-VCH
2024-02-01
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| Series: | ChemElectroChem |
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| Online Access: | https://doi.org/10.1002/celc.202300564 |
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| author | Thabo Matthews Dr. Tarekegn H. Dolla Siyabonga P. Mbokazi Makhaokane P. Chabalala Dr. Julia Gallenberger Prof. Jan P. Hofmann Dr. Kiarii E. Muriithi Prof. Penny P. Govender Prof. Nobanathi W. Maxakato |
| author_facet | Thabo Matthews Dr. Tarekegn H. Dolla Siyabonga P. Mbokazi Makhaokane P. Chabalala Dr. Julia Gallenberger Prof. Jan P. Hofmann Dr. Kiarii E. Muriithi Prof. Penny P. Govender Prof. Nobanathi W. Maxakato |
| author_sort | Thabo Matthews |
| collection | DOAJ |
| description | Abstract Direct alcohol fuel cells (DAFCs) face several challenges such as carbon support corrosion, poor kinetics, and long‐term stability, requiring improved electrocatalyst support development. We synthesized 5 %Pd/fMC−NiO using a microwave‐assisted sodium borohydride‐enhanced polyol method. X‐ray photoelectron spectroscopy, transmission electron microscope, and X‐ray diffractometry probed the material's surface composition, morphology, and structure. ICP‐OES is employed to quantify palladium loading. Fourier Transform Infrared Spectroscopy mapped the functional groups. Cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy, and chronoamperometry show that the 5 %Pd/fMC−NiO has the lowest activation energy, and with that, the best electroactivity, which is ~16 times higher compared to commercial Pd/C; additionally, the catalyst shows anti‐poisoning properties, and long‐term durability. This is merited to the cooperation and promotional effect of Pd/fMC−NiO. The electrocatalysts’ electroactivity improved via enhanced electron movement instigated by NiO. This study introduced the parallelism effect concept borrowed from the graphite structure for controlled electron channeling the 5 % Pd/fMC−NiO electrocatalyst. The theoretical calculations corroborated the experimental findings that our approach favors anchoring and dispersing Pd NPs uniformly, demonstrating NiO′s cooperative and promotional effects. Thus, opening new opportunities for the development of electrocatalysts for high‐performance DAFCs. |
| first_indexed | 2024-03-08T00:19:42Z |
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| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-04-24T07:41:09Z |
| publishDate | 2024-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-3ec44223feed49aeb69186e7b4d945b22024-04-19T13:10:31ZengWiley-VCHChemElectroChem2196-02162024-02-01114n/an/a10.1002/celc.202300564Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT CalculationsThabo Matthews0Dr. Tarekegn H. Dolla1Siyabonga P. Mbokazi2Makhaokane P. Chabalala3Dr. Julia Gallenberger4Prof. Jan P. Hofmann5Dr. Kiarii E. Muriithi6Prof. Penny P. Govender7Prof. Nobanathi W. Maxakato8Department of Chemical Sciences University of Johannesburg 2028 Doornfontein South AfricaDepartment of Chemistry Wolaita Sodo University P.O. Box 138 Wolaita Sodo EthiopiaDepartment of Chemical Sciences University of Johannesburg 2028 Doornfontein South AfricaDepartment of Chemical Sciences University of Johannesburg 2028 Doornfontein South AfricaSurface Science Laboratory Department of Materials and Earth Sciences Technical University of Darmstadt Otto-Berndt-Strasse 3 64287 Darmstadt GermanySurface Science Laboratory Department of Materials and Earth Sciences Technical University of Darmstadt Otto-Berndt-Strasse 3 64287 Darmstadt GermanyDepartment of Chemical Sciences University of Johannesburg 2028 Doornfontein South AfricaDepartment of Physics University of Johannesburg Auckland Park 2006 Johannesburg South AfricaDepartment of Chemical Sciences University of Johannesburg 2028 Doornfontein South AfricaAbstract Direct alcohol fuel cells (DAFCs) face several challenges such as carbon support corrosion, poor kinetics, and long‐term stability, requiring improved electrocatalyst support development. We synthesized 5 %Pd/fMC−NiO using a microwave‐assisted sodium borohydride‐enhanced polyol method. X‐ray photoelectron spectroscopy, transmission electron microscope, and X‐ray diffractometry probed the material's surface composition, morphology, and structure. ICP‐OES is employed to quantify palladium loading. Fourier Transform Infrared Spectroscopy mapped the functional groups. Cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy, and chronoamperometry show that the 5 %Pd/fMC−NiO has the lowest activation energy, and with that, the best electroactivity, which is ~16 times higher compared to commercial Pd/C; additionally, the catalyst shows anti‐poisoning properties, and long‐term durability. This is merited to the cooperation and promotional effect of Pd/fMC−NiO. The electrocatalysts’ electroactivity improved via enhanced electron movement instigated by NiO. This study introduced the parallelism effect concept borrowed from the graphite structure for controlled electron channeling the 5 % Pd/fMC−NiO electrocatalyst. The theoretical calculations corroborated the experimental findings that our approach favors anchoring and dispersing Pd NPs uniformly, demonstrating NiO′s cooperative and promotional effects. Thus, opening new opportunities for the development of electrocatalysts for high‐performance DAFCs.https://doi.org/10.1002/celc.202300564energyethylene glycol electrooxidationfuel cellspalladiumsynergism |
| spellingShingle | Thabo Matthews Dr. Tarekegn H. Dolla Siyabonga P. Mbokazi Makhaokane P. Chabalala Dr. Julia Gallenberger Prof. Jan P. Hofmann Dr. Kiarii E. Muriithi Prof. Penny P. Govender Prof. Nobanathi W. Maxakato Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations ChemElectroChem energy ethylene glycol electrooxidation fuel cells palladium synergism |
| title | Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations |
| title_full | Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations |
| title_fullStr | Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations |
| title_full_unstemmed | Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations |
| title_short | Pd/fMC−NiO Synergistic, Promotional Effect and Cooperation Induced Electrocatalysis towards Ethylene Glycol Electrooxidation: Experimental Approach and DFT Calculations |
| title_sort | pd fmc nio synergistic promotional effect and cooperation induced electrocatalysis towards ethylene glycol electrooxidation experimental approach and dft calculations |
| topic | energy ethylene glycol electrooxidation fuel cells palladium synergism |
| url | https://doi.org/10.1002/celc.202300564 |
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