{"title":"利用质子陶瓷电解槽进行氨电合成的铈铁电催化剂","authors":"Moe Okazaki , Junichiro Otomo","doi":"10.1016/j.ssi.2024.116649","DOIUrl":null,"url":null,"abstract":"<div><p>Iron has proven to be a simple yet high-performing electrode for ammonia electrosynthesis, particularly when used with protonic ceramic electrolysis cells. On a proton-conducting BaCe<sub>0.9</sub>Y<sub>0.1</sub>O<sub>3−δ</sub> (BCY) electrolyte, iron oxide forms an interfacial layer during sintering due to solid-state cation diffusion. In this work, we found that the ceria‑iron layer that is formed in-situ both enables electrode adhesion and is active for ammonia electrosynthesis. Cells with electrodes fabricated from CeO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub> at a weight ratio of 1:1 (CeFe11) and 6:1 (CeFe61), designed to replicate the composition of the interfacial layer, resulted in ammonia formation rates similar to those of cells with pure Fe electrodes, reaching 1.1–1.2 × 10<sup>−8</sup> mol s<sup>−1</sup> cm<sup>−2</sup> at an applied voltage of −1 V at 600 °C. The ceria‑iron catalysts exhibited higher catalytic activity and a moderate electrochemical activity. A comparison of these electrodes suggests that the regions where ceria and iron are in proximity are the most active for ammonia electrosynthesis. Furthermore, CeFe11 demonstrates similar ammonia formation rates on BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3−δ</sub> (BZCYYb1711) as on BCY; as BZCYYb is more stable than BCY in the presence of water vapor, the development of ceria‑iron electrodes could widen the application of iron-based electrodes to ammonia electrosynthesis combined with water electrolysis.</p></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"414 ","pages":"Article 116649"},"PeriodicalIF":3.0000,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ceria‑iron electrocatalysts for ammonia electrosynthesis using protonic ceramic electrolysis cells\",\"authors\":\"Moe Okazaki , Junichiro Otomo\",\"doi\":\"10.1016/j.ssi.2024.116649\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Iron has proven to be a simple yet high-performing electrode for ammonia electrosynthesis, particularly when used with protonic ceramic electrolysis cells. On a proton-conducting BaCe<sub>0.9</sub>Y<sub>0.1</sub>O<sub>3−δ</sub> (BCY) electrolyte, iron oxide forms an interfacial layer during sintering due to solid-state cation diffusion. In this work, we found that the ceria‑iron layer that is formed in-situ both enables electrode adhesion and is active for ammonia electrosynthesis. Cells with electrodes fabricated from CeO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub> at a weight ratio of 1:1 (CeFe11) and 6:1 (CeFe61), designed to replicate the composition of the interfacial layer, resulted in ammonia formation rates similar to those of cells with pure Fe electrodes, reaching 1.1–1.2 × 10<sup>−8</sup> mol s<sup>−1</sup> cm<sup>−2</sup> at an applied voltage of −1 V at 600 °C. The ceria‑iron catalysts exhibited higher catalytic activity and a moderate electrochemical activity. A comparison of these electrodes suggests that the regions where ceria and iron are in proximity are the most active for ammonia electrosynthesis. Furthermore, CeFe11 demonstrates similar ammonia formation rates on BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3−δ</sub> (BZCYYb1711) as on BCY; as BZCYYb is more stable than BCY in the presence of water vapor, the development of ceria‑iron electrodes could widen the application of iron-based electrodes to ammonia electrosynthesis combined with water electrolysis.</p></div>\",\"PeriodicalId\":431,\"journal\":{\"name\":\"Solid State Ionics\",\"volume\":\"414 \",\"pages\":\"Article 116649\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2024-08-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Solid State Ionics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0167273824001978\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid State Ionics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167273824001978","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
摘要
事实证明,铁是一种用于氨电解合成的简单而高性能的电极,尤其是在质子陶瓷电解槽中使用时。在质子传导的 BaCeYO(BCY)电解质上,由于固态阳离子扩散,氧化铁在烧结过程中形成了界面层。在这项工作中,我们发现原位形成的铈铁层既能实现电极粘附,又能促进氨的电合成。使用重量比为 1:1 (CeFe11)和 6:1(CeFe61)的 CeO-FeO 制成的电极(旨在复制界面层的成分)的电池,其氨气形成率与使用纯铁电极的电池相近,在 600 °C 下施加 -1 V 电压时达到 1.1-1.2 × 10 mol s cm。铈铁催化剂具有更高的催化活性和适度的电化学活性。对这些电极的比较表明,铈和铁相邻的区域对氨的电合成最为活跃。此外,CeFe11 在 BaZrCeYYbO(BZCYYb1711)上的氨形成率与在 BCY 上的氨形成率相似;由于 BZCYYb 在水蒸气存在下比 BCY 更稳定,因此铈铁电极的开发可拓宽铁基电极在结合水电解的氨电合成中的应用。
Ceria‑iron electrocatalysts for ammonia electrosynthesis using protonic ceramic electrolysis cells
Iron has proven to be a simple yet high-performing electrode for ammonia electrosynthesis, particularly when used with protonic ceramic electrolysis cells. On a proton-conducting BaCe0.9Y0.1O3−δ (BCY) electrolyte, iron oxide forms an interfacial layer during sintering due to solid-state cation diffusion. In this work, we found that the ceria‑iron layer that is formed in-situ both enables electrode adhesion and is active for ammonia electrosynthesis. Cells with electrodes fabricated from CeO2-Fe2O3 at a weight ratio of 1:1 (CeFe11) and 6:1 (CeFe61), designed to replicate the composition of the interfacial layer, resulted in ammonia formation rates similar to those of cells with pure Fe electrodes, reaching 1.1–1.2 × 10−8 mol s−1 cm−2 at an applied voltage of −1 V at 600 °C. The ceria‑iron catalysts exhibited higher catalytic activity and a moderate electrochemical activity. A comparison of these electrodes suggests that the regions where ceria and iron are in proximity are the most active for ammonia electrosynthesis. Furthermore, CeFe11 demonstrates similar ammonia formation rates on BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb1711) as on BCY; as BZCYYb is more stable than BCY in the presence of water vapor, the development of ceria‑iron electrodes could widen the application of iron-based electrodes to ammonia electrosynthesis combined with water electrolysis.
期刊介绍:
This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on:
(i) physics and chemistry of defects in solids;
(ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering;
(iii) ion transport measurements, mechanisms and theory;
(iv) solid state electrochemistry;
(v) ionically-electronically mixed conducting solids.
Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties.
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