Hyeongwon Jeong , Yo Han Kim , Wonjun Jang , Yunseong Ji , Jong-Eun Hong , Jae-ha Myung
{"title":"原位制备的通过氨分解高效制氢的共溶剂纳米催化剂","authors":"Hyeongwon Jeong , Yo Han Kim , Wonjun Jang , Yunseong Ji , Jong-Eun Hong , Jae-ha Myung","doi":"10.1016/j.ssi.2024.116679","DOIUrl":null,"url":null,"abstract":"<div><p>Active and durable catalytic material for ammonia (NH<sub>3</sub>) decomposition reaction is attracting attentions for utilization of NH<sub>3</sub> as an innovative hydrogen carrier. In this study, diverse single metal and alloy nano catalysts are prepared via in-situ exsolution method and their NH<sub>3</sub> decomposition properties are evaluated. Transition metal cations (Ni, Co, Fe ions) are doped into the La<sub>0.43</sub>Ca<sub>0.37</sub>M<sub>x</sub>N<sub>y</sub>Ti<sub>1-(x+y)</sub>O<sub>3-δ</sub> (LCMNT) perovskite oxide structure and exsolved on its surface as supported nano particles under reduction condition. The maximum doping level and chemical composition of exsolution catalysts are investigated to optimize their NH<sub>3</sub> decomposition activity. The exsolution catalyst demonstrates improved NH<sub>3</sub> decomposition characteristics compared to conventionally prepared infiltration catalysts, indicating higher conversion efficiency and H<sub>2</sub> production rate. The exsolved nano catalysts also exhibit great thermochemical stability against catalyst agglomeration or surface nitriding. The results obtained in this study suggest the potential utilization of exsolution catalysts for on-site production of H<sub>2</sub> through NH<sub>3</sub> decomposition catalysis.</p></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"416 ","pages":"Article 116679"},"PeriodicalIF":3.0000,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In-situ prepared co exsolution nano catalyst for efficient hydrogen generation via ammonia decomposition\",\"authors\":\"Hyeongwon Jeong , Yo Han Kim , Wonjun Jang , Yunseong Ji , Jong-Eun Hong , Jae-ha Myung\",\"doi\":\"10.1016/j.ssi.2024.116679\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Active and durable catalytic material for ammonia (NH<sub>3</sub>) decomposition reaction is attracting attentions for utilization of NH<sub>3</sub> as an innovative hydrogen carrier. In this study, diverse single metal and alloy nano catalysts are prepared via in-situ exsolution method and their NH<sub>3</sub> decomposition properties are evaluated. Transition metal cations (Ni, Co, Fe ions) are doped into the La<sub>0.43</sub>Ca<sub>0.37</sub>M<sub>x</sub>N<sub>y</sub>Ti<sub>1-(x+y)</sub>O<sub>3-δ</sub> (LCMNT) perovskite oxide structure and exsolved on its surface as supported nano particles under reduction condition. The maximum doping level and chemical composition of exsolution catalysts are investigated to optimize their NH<sub>3</sub> decomposition activity. The exsolution catalyst demonstrates improved NH<sub>3</sub> decomposition characteristics compared to conventionally prepared infiltration catalysts, indicating higher conversion efficiency and H<sub>2</sub> production rate. The exsolved nano catalysts also exhibit great thermochemical stability against catalyst agglomeration or surface nitriding. The results obtained in this study suggest the potential utilization of exsolution catalysts for on-site production of H<sub>2</sub> through NH<sub>3</sub> decomposition catalysis.</p></div>\",\"PeriodicalId\":431,\"journal\":{\"name\":\"Solid State Ionics\",\"volume\":\"416 \",\"pages\":\"Article 116679\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2024-08-31\",\"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/S0167273824002273\",\"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/S0167273824002273","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}
In-situ prepared co exsolution nano catalyst for efficient hydrogen generation via ammonia decomposition
Active and durable catalytic material for ammonia (NH3) decomposition reaction is attracting attentions for utilization of NH3 as an innovative hydrogen carrier. In this study, diverse single metal and alloy nano catalysts are prepared via in-situ exsolution method and their NH3 decomposition properties are evaluated. Transition metal cations (Ni, Co, Fe ions) are doped into the La0.43Ca0.37MxNyTi1-(x+y)O3-δ (LCMNT) perovskite oxide structure and exsolved on its surface as supported nano particles under reduction condition. The maximum doping level and chemical composition of exsolution catalysts are investigated to optimize their NH3 decomposition activity. The exsolution catalyst demonstrates improved NH3 decomposition characteristics compared to conventionally prepared infiltration catalysts, indicating higher conversion efficiency and H2 production rate. The exsolved nano catalysts also exhibit great thermochemical stability against catalyst agglomeration or surface nitriding. The results obtained in this study suggest the potential utilization of exsolution catalysts for on-site production of H2 through NH3 decomposition catalysis.
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.
Review papers and relevant symposium proceedings are welcome.
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