New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode
Yttrium-doped barium cerate (BCY15) was used as an anode ceramic matrix for synthesis of the Ni-based cermet anode with application in proton-conducting solid oxide fuel cells (pSOFC). The hydrazine wet-chemical synthesis was developed as an alternative low-cost energy-efficient route that promotes...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/12/3224 |
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| author | Dimitrinka Nikolova Margarita Gabrovska Gergana Raikova Emiliya Mladenova Daria Vladikova Krassimir L. Kostov Yordanka Karakirova |
| author_facet | Dimitrinka Nikolova Margarita Gabrovska Gergana Raikova Emiliya Mladenova Daria Vladikova Krassimir L. Kostov Yordanka Karakirova |
| author_sort | Dimitrinka Nikolova |
| collection | DOAJ |
| description | Yttrium-doped barium cerate (BCY15) was used as an anode ceramic matrix for synthesis of the Ni-based cermet anode with application in proton-conducting solid oxide fuel cells (pSOFC). The hydrazine wet-chemical synthesis was developed as an alternative low-cost energy-efficient route that promotes ‘in situ’ introduction of metallic Ni particles in the BCY15 matrix. The focus of this study is a detailed comparative characterization of the nickel state in the Ni/BCY15 cermets obtained in two types of medium, aqueous and anhydrous ethylene glycol environment, performed by a combination of XRD, N<sub>2</sub> physisorption, SEM, EPR, XPS, and electrochemical impedance spectroscopy. Obtained results on the effect of the working medium show that ethylene glycol ensures active Ni cermet preparation with well-dispersed nanoscale metal Ni particles and provides a strong interaction between hydrazine-originating metallic Ni and cerium from the BCY15 matrix. The metallic Ni phase in the pSOFC anode is more stable during reoxidation compared to the Ni cermet prepared by the commercial mechanical mixing procedure. These factors contribute toward improvement of the anode’s electrochemical performance in pSOFC, enhanced stability, and a lower degradation rate during operation. |
| first_indexed | 2024-03-10T03:27:30Z |
| format | Article |
| id | doaj.art-9a0122d12ee7414fbde88a03c3891593 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T03:27:30Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-9a0122d12ee7414fbde88a03c38915932023-11-23T09:49:36ZengMDPI AGNanomaterials2079-49912021-11-011112322410.3390/nano11123224New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC AnodeDimitrinka Nikolova0Margarita Gabrovska1Gergana Raikova2Emiliya Mladenova3Daria Vladikova4Krassimir L. Kostov5Yordanka Karakirova6Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaAcad. Evgeni Budevski Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaAcad. Evgeni Budevski Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaAcad. Evgeni Budevski Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaYttrium-doped barium cerate (BCY15) was used as an anode ceramic matrix for synthesis of the Ni-based cermet anode with application in proton-conducting solid oxide fuel cells (pSOFC). The hydrazine wet-chemical synthesis was developed as an alternative low-cost energy-efficient route that promotes ‘in situ’ introduction of metallic Ni particles in the BCY15 matrix. The focus of this study is a detailed comparative characterization of the nickel state in the Ni/BCY15 cermets obtained in two types of medium, aqueous and anhydrous ethylene glycol environment, performed by a combination of XRD, N<sub>2</sub> physisorption, SEM, EPR, XPS, and electrochemical impedance spectroscopy. Obtained results on the effect of the working medium show that ethylene glycol ensures active Ni cermet preparation with well-dispersed nanoscale metal Ni particles and provides a strong interaction between hydrazine-originating metallic Ni and cerium from the BCY15 matrix. The metallic Ni phase in the pSOFC anode is more stable during reoxidation compared to the Ni cermet prepared by the commercial mechanical mixing procedure. These factors contribute toward improvement of the anode’s electrochemical performance in pSOFC, enhanced stability, and a lower degradation rate during operation.https://www.mdpi.com/2079-4991/11/12/3224Ni/BCY15 proton-conducting anodehydrazine reductionNi–Ce interactionSOFCelectrochemical impedance spectroscopyXPS |
| spellingShingle | Dimitrinka Nikolova Margarita Gabrovska Gergana Raikova Emiliya Mladenova Daria Vladikova Krassimir L. Kostov Yordanka Karakirova New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode Nanomaterials Ni/BCY15 proton-conducting anode hydrazine reduction Ni–Ce interaction SOFC electrochemical impedance spectroscopy XPS |
| title | New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode |
| title_full | New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode |
| title_fullStr | New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode |
| title_full_unstemmed | New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode |
| title_short | New Insights on the Nickel State Deposited by Hydrazine Wet-Chemical Synthesis Route in the Ni/BCY15 Proton-Conducting SOFC Anode |
| title_sort | new insights on the nickel state deposited by hydrazine wet chemical synthesis route in the ni bcy15 proton conducting sofc anode |
| topic | Ni/BCY15 proton-conducting anode hydrazine reduction Ni–Ce interaction SOFC electrochemical impedance spectroscopy XPS |
| url | https://www.mdpi.com/2079-4991/11/12/3224 |
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