Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites
[EN] Double perovskite oxides of the Sr 2 Fe 1.5 Mo 0.5 O 6-8 class are promising electrodes for Solid Oxide Fuel Cells (SOFCs) and Electrolyzers (SOECs) due to their outstanding electrochemical properties and durability. Additionally, their physicochemical properties can be tuned by B-site cation d...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/207841 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/207841 |
| Access Level: | acceso embargado |
| Palavra-chave: | Exsolution Double perovskites A-site deficiency A-site doping Solid oxide electrochemical cells Nickel |
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oai:riunet.upv.es:10251/207841 |
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Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites Delgado-Galicia, Blanca López-García, Andrés Carrillo-Del Teso, Alfonso Juan Serra Alfaro, José Manuel|||0000-0002-1515-1106 Exsolution Double perovskites A-site deficiency A-site doping Solid oxide electrochemical cells Nickel [EN] Double perovskite oxides of the Sr 2 Fe 1.5 Mo 0.5 O 6-8 class are promising electrodes for Solid Oxide Fuel Cells (SOFCs) and Electrolyzers (SOECs) due to their outstanding electrochemical properties and durability. Additionally, their physicochemical properties can be tuned by B-site cation doping, namely, by partially substituting Fe cations with other transition metals such as Ni, Co, Mn, or Cu. This also allows the grain-surface functionalization with metallic alloyed nanocatalysts upon reduction driven by the exsolution phenomena, leading to higher electrocatalytic activity and resistance against sintering and coking. Traditionally, A-site deficiency has been employed to improve the amount of exsolved nanoparticles and, thereby, increase the number of Triple Phase Boundaries in the electrode. However, in Ni-doped non-stoichiometric double perovskite materials (e.g., Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 ), A-site deficiency results in undesired NiO phase segregations. This, in turn, lowers the number of exsolvable cations, decreasing the number of metallic nanocatalysts compared to the stoichiometric compound. In this work, the impact of A-site doping with lanthanides (viz. Gd, La, Nd, and Pr) on the exsolution ability and electrochemical properties of non-stoichiometric Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 was evaluated. The results indicate that lanthanide doping enhances the conductivity of the double perovskites both in oxidizing and reducing atmospheres. In addition, lanthanide dopants that slightly destabilize the cubic structure also improve the exsolution dispersion, which decreases with increasing the double perovskite cell volume. These results illustrate how to design more efficient and durable electrocatalysts by modifying the double perovskite structure with A-site dopants. The project that gave rise to these results received the support of a fellowship from "la Caixa" Foundation (ID 100010434). The fellowship code is LCF/BQ/PI20/11760015. Financial support by the Spanish Ministry of Science and Innovation (CEX2021-001230-S grant funded by MCIN/AEI/10.13039/501100011033) and by Generalitat Valenciana (CIPROM/2022/10) is gratefully acknowledged. We thank the support of the Electronic Microscopy Service of the Universitat Politecnica de Valencia. Blanca Delgado-Galicia thanks the funding of the SECAT Grants Program for the Completion of Master's Theses in Catalysis.r Ministry of Science and Innovation (CEX2021-001230-S grant funded by MCIN/AEI/10.13039/501100011033) and by Generalitat Valenciana (CIPROM/2022/10) is gratefully acknowledged. We thank the support of the Electronic Microscopy Service of the Universitat Politècnica de València. Blanca Delgado-Galicia thanks the funding of the SECAT Grants Program for the Completion of Master's Theses in Catalysis. Elsevier https://riunet.upv.es/handle/10251/207841 |
| title |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites |
| spellingShingle |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites Delgado-Galicia, Blanca Exsolution Double perovskites A-site deficiency A-site doping Solid oxide electrochemical cells Nickel |
| title_short |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites |
| title_full |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites |
| title_fullStr |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites |
| title_full_unstemmed |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites |
| title_sort |
Effects of lanthanide doping on the electrode properties and exsolution behavior of A-site deficient Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 double perovskites |
| author |
Delgado-Galicia, Blanca |
| author_facet |
Delgado-Galicia, Blanca López-García, Andrés Carrillo-Del Teso, Alfonso Juan Serra Alfaro, José Manuel|||0000-0002-1515-1106 |
| author_role |
author |
| author2 |
López-García, Andrés Carrillo-Del Teso, Alfonso Juan Serra Alfaro, José Manuel|||0000-0002-1515-1106 |
| author2_role |
author author author |
| topic |
Exsolution Double perovskites A-site deficiency A-site doping Solid oxide electrochemical cells Nickel |
| topic_facet |
Exsolution Double perovskites A-site deficiency A-site doping Solid oxide electrochemical cells Nickel |
| description |
[EN] Double perovskite oxides of the Sr 2 Fe 1.5 Mo 0.5 O 6-8 class are promising electrodes for Solid Oxide Fuel Cells (SOFCs) and Electrolyzers (SOECs) due to their outstanding electrochemical properties and durability. Additionally, their physicochemical properties can be tuned by B-site cation doping, namely, by partially substituting Fe cations with other transition metals such as Ni, Co, Mn, or Cu. This also allows the grain-surface functionalization with metallic alloyed nanocatalysts upon reduction driven by the exsolution phenomena, leading to higher electrocatalytic activity and resistance against sintering and coking. Traditionally, A-site deficiency has been employed to improve the amount of exsolved nanoparticles and, thereby, increase the number of Triple Phase Boundaries in the electrode. However, in Ni-doped non-stoichiometric double perovskite materials (e.g., Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 ), A-site deficiency results in undesired NiO phase segregations. This, in turn, lowers the number of exsolvable cations, decreasing the number of metallic nanocatalysts compared to the stoichiometric compound. In this work, the impact of A-site doping with lanthanides (viz. Gd, La, Nd, and Pr) on the exsolution ability and electrochemical properties of non-stoichiometric Sr 1.9 Fe 1.3 Ni 0.2 Mo 0.5 O 6-8 was evaluated. The results indicate that lanthanide doping enhances the conductivity of the double perovskites both in oxidizing and reducing atmospheres. In addition, lanthanide dopants that slightly destabilize the cubic structure also improve the exsolution dispersion, which decreases with increasing the double perovskite cell volume. These results illustrate how to design more efficient and durable electrocatalysts by modifying the double perovskite structure with A-site dopants. |
| publishDate |
2024 |
| format |
article |
| url |
https://riunet.upv.es/handle/10251/207841 |
| language |
eng |
| eu_rights_str_mv |
embargoedAccess |
| publisher |
Elsevier |
| institution |
Universitat Politècnica de València (UPV) |
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RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| reponame_str |
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| instname_str |
Universitat Politècnica de València (UPV) |
| _version_ |
1878441450381770752 |
| publishDateSort |
2024 |
| author_browse |
Carrillo-Del Teso, Alfonso Juan Delgado-Galicia, Blanca López-García, Andrés Serra Alfaro, José Manuel|||0000-0002-1515-1106 |
| publisherStr |
Elsevier |
| score |
6,924472 |