Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells
The correlation between lattice strain induced by metal dispersion into grain and the cathodic overpotential is studied for increasing oxygen‐dissociation activity and improving power density of solid oxide fuel cells (SOFC) at decreased temperature. Pt or Au dispersion in Pr1.90Ni0.71Cu0.21Ga0.05O4...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-10-01
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| Series: | Advanced Energy & Sustainability Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/aesr.202300084 |
| _version_ | 1797662915460857856 |
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| author | Sun Jae Kim Motonori Watanabe Tatsumi Ishihara |
| author_facet | Sun Jae Kim Motonori Watanabe Tatsumi Ishihara |
| author_sort | Sun Jae Kim |
| collection | DOAJ |
| description | The correlation between lattice strain induced by metal dispersion into grain and the cathodic overpotential is studied for increasing oxygen‐dissociation activity and improving power density of solid oxide fuel cells (SOFC) at decreased temperature. Pt or Au dispersion in Pr1.90Ni0.71Cu0.21Ga0.05O4+d (PNCG) is prepared and the 3D tensile strain is successfully induced after sintering by a mismatch in thermal expansion coefficient. Due to higher hardness and melting temperature, Pt dispersion into bulk of PNCG introduces larger tensile strain than that by Au at the same amount. In particular, at 1 mol% Pt dispersion, large tensile strain of 0.67% is induced. Overpotential of 1 mol% Pt‐PNCG cathode is 8 times smaller (35 mV) than that of PNCG (270 mV) at 800 °C and 300 mA cm−2, and it is found that the cathodic overpotential of PNCG is decreased with tensile strain on both Pt and Au dispersion. This cathodic activity enhancement appears to be related with the increased diffusivity of oxide ion in PNCG. In this study, cathodic overpotential is more significantly influenced by the induced tensile strain comparing with the intrinsic catalytic activity of the dispersed metal. |
| first_indexed | 2024-03-11T19:07:01Z |
| format | Article |
| id | doaj.art-246944faecce426f98fb499c5c0098a9 |
| institution | Directory Open Access Journal |
| issn | 2699-9412 |
| language | English |
| last_indexed | 2024-03-11T19:07:01Z |
| publishDate | 2023-10-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Energy & Sustainability Research |
| spelling | doaj.art-246944faecce426f98fb499c5c0098a92023-10-10T05:50:52ZengWiley-VCHAdvanced Energy & Sustainability Research2699-94122023-10-01410n/an/a10.1002/aesr.202300084Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel CellsSun Jae Kim0Motonori Watanabe1Tatsumi Ishihara2Department of Applied Chemistry Faculty of Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 JapanInternational Institute for Carbon Neutral Energy Research (WPI-I2CNER) Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 JapanDepartment of Applied Chemistry Faculty of Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 JapanThe correlation between lattice strain induced by metal dispersion into grain and the cathodic overpotential is studied for increasing oxygen‐dissociation activity and improving power density of solid oxide fuel cells (SOFC) at decreased temperature. Pt or Au dispersion in Pr1.90Ni0.71Cu0.21Ga0.05O4+d (PNCG) is prepared and the 3D tensile strain is successfully induced after sintering by a mismatch in thermal expansion coefficient. Due to higher hardness and melting temperature, Pt dispersion into bulk of PNCG introduces larger tensile strain than that by Au at the same amount. In particular, at 1 mol% Pt dispersion, large tensile strain of 0.67% is induced. Overpotential of 1 mol% Pt‐PNCG cathode is 8 times smaller (35 mV) than that of PNCG (270 mV) at 800 °C and 300 mA cm−2, and it is found that the cathodic overpotential of PNCG is decreased with tensile strain on both Pt and Au dispersion. This cathodic activity enhancement appears to be related with the increased diffusivity of oxide ion in PNCG. In this study, cathodic overpotential is more significantly influenced by the induced tensile strain comparing with the intrinsic catalytic activity of the dispersed metal.https://doi.org/10.1002/aesr.202300084cathodesoxygen reduction reactionPr2NiO4solid oxide fuel cellsstrain effect |
| spellingShingle | Sun Jae Kim Motonori Watanabe Tatsumi Ishihara Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells Advanced Energy & Sustainability Research cathodes oxygen reduction reaction Pr2NiO4 solid oxide fuel cells strain effect |
| title | Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells |
| title_full | Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells |
| title_fullStr | Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells |
| title_full_unstemmed | Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells |
| title_short | Pronounced Strain Effects on Oxygen Dissociation; Pt‐ or Au‐Dispersed Pr2Ni(Cu, Ga)O4 for Active Cathode of Solid Oxide Fuel Cells |
| title_sort | pronounced strain effects on oxygen dissociation pt or au dispersed pr2ni cu ga o4 for active cathode of solid oxide fuel cells |
| topic | cathodes oxygen reduction reaction Pr2NiO4 solid oxide fuel cells strain effect |
| url | https://doi.org/10.1002/aesr.202300084 |
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