Jiaxin Su , Jiaqi Zhang , Shuming Chai , Yankun Wang , Sibo Wang , Yuanxing Fang
{"title":"二元熔盐法制备聚七嗪亚胺光阳极的优化研究","authors":"Jiaxin Su , Jiaqi Zhang , Shuming Chai , Yankun Wang , Sibo Wang , Yuanxing Fang","doi":"10.3866/PKU.WHXB202408012","DOIUrl":null,"url":null,"abstract":"<div><div>Polymer-based photoanodes for the water oxidation reaction have recently garnered attention, with carbon nitride standing out due to its numerous advantages. This study focuses on synthesizing crystalline carbon nitride photoanodes, specifically poly(heptazine imide) (PHI), and explores the role of salts in their production. Using a binary molten salt system, optimal photocurrent density of 365 μA·cm<sup>−2</sup> was achieved with a voltage bias of 1.23 V <em>versus</em> the reversible hydrogen electrode under AM 1.5G illumination, this performance is <em>ca</em>. 18 times to the pristine PCN photoanode. In this process, NH₄SCN facilitates the growth of SnS<sub>2</sub> seeding layers, while K<sub>2</sub>CO<sub>3</sub> enhances film crystallinity. <em>In situ</em> electrochemical analyses show that this salt combination improves photoexcited charge transfer efficiency and minimizes resistance in the SnS<sub>2</sub> layer. This study clarifies the role of salts in synthesizing the PHI photoanode and provides insights for designing high-crystallinity carbon nitride-based functional films.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (164KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":6964,"journal":{"name":"物理化学学报","volume":"40 12","pages":"Article 2408012"},"PeriodicalIF":13.5000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimizing Poly(heptazine imide) Photoanodes Using Binary Molten Salt Synthesis for Water Oxidation Reaction\",\"authors\":\"Jiaxin Su , Jiaqi Zhang , Shuming Chai , Yankun Wang , Sibo Wang , Yuanxing Fang\",\"doi\":\"10.3866/PKU.WHXB202408012\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Polymer-based photoanodes for the water oxidation reaction have recently garnered attention, with carbon nitride standing out due to its numerous advantages. This study focuses on synthesizing crystalline carbon nitride photoanodes, specifically poly(heptazine imide) (PHI), and explores the role of salts in their production. Using a binary molten salt system, optimal photocurrent density of 365 μA·cm<sup>−2</sup> was achieved with a voltage bias of 1.23 V <em>versus</em> the reversible hydrogen electrode under AM 1.5G illumination, this performance is <em>ca</em>. 18 times to the pristine PCN photoanode. In this process, NH₄SCN facilitates the growth of SnS<sub>2</sub> seeding layers, while K<sub>2</sub>CO<sub>3</sub> enhances film crystallinity. <em>In situ</em> electrochemical analyses show that this salt combination improves photoexcited charge transfer efficiency and minimizes resistance in the SnS<sub>2</sub> layer. This study clarifies the role of salts in synthesizing the PHI photoanode and provides insights for designing high-crystallinity carbon nitride-based functional films.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (164KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>\",\"PeriodicalId\":6964,\"journal\":{\"name\":\"物理化学学报\",\"volume\":\"40 12\",\"pages\":\"Article 2408012\"},\"PeriodicalIF\":13.5000,\"publicationDate\":\"2024-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"物理化学学报\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1000681824001899\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/10/17 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"物理化学学报","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1000681824001899","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/10/17 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Optimizing Poly(heptazine imide) Photoanodes Using Binary Molten Salt Synthesis for Water Oxidation Reaction
Polymer-based photoanodes for the water oxidation reaction have recently garnered attention, with carbon nitride standing out due to its numerous advantages. This study focuses on synthesizing crystalline carbon nitride photoanodes, specifically poly(heptazine imide) (PHI), and explores the role of salts in their production. Using a binary molten salt system, optimal photocurrent density of 365 μA·cm−2 was achieved with a voltage bias of 1.23 V versus the reversible hydrogen electrode under AM 1.5G illumination, this performance is ca. 18 times to the pristine PCN photoanode. In this process, NH₄SCN facilitates the growth of SnS2 seeding layers, while K2CO3 enhances film crystallinity. In situ electrochemical analyses show that this salt combination improves photoexcited charge transfer efficiency and minimizes resistance in the SnS2 layer. This study clarifies the role of salts in synthesizing the PHI photoanode and provides insights for designing high-crystallinity carbon nitride-based functional films.
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