{"title":"提高双轴应变诱导催化活性的聚氧化金属盐封装效率","authors":"","doi":"10.1016/j.ensm.2024.103777","DOIUrl":null,"url":null,"abstract":"<div><p>Controllable assembly of polyoxometalates (POMs) in confined nanochannels is crucial to understand the host-guest structures and tailor the emerging properties for applications. Here, we report the encapsulation of polyoxometalates inside single-walled carbon nanotubes (SWNTs) for target catalytic regulation. Theoretical modeling predicts the confined polyoxomolybdates are able to induce biaxial tensile strains of SWNTs for more stable interaction with iron phthalocyanine (FePc) and tailor the charge distribution and coordination environment of targetable FeN<sub>4</sub> sites, leading to improved catalytic activity toward oxygen reduction reaction (ORR). The polyoxomolybdates are confined in the SWNTs <em>via</em> redox-driven encapsulation mechanism with a POM encapsulation efficiency of about 21 %. The constructed FePc/SWNT@POM molecule catalyst exhibits a high half-wave potential of 0.90 V, excellent stability and methanol tolerance in alkaline medium. The zinc-air battery also presents prominent charge-discharge ability and long-term durability over 400 h with a peak power density of 190.8 mW cm<sup>–2</sup>.</p></div>","PeriodicalId":306,"journal":{"name":"Energy Storage Materials","volume":null,"pages":null},"PeriodicalIF":18.9000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Heightening polyoxometalate encapsulation efficiency for biaxial strain-induced catalytic activity boosting\",\"authors\":\"\",\"doi\":\"10.1016/j.ensm.2024.103777\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Controllable assembly of polyoxometalates (POMs) in confined nanochannels is crucial to understand the host-guest structures and tailor the emerging properties for applications. Here, we report the encapsulation of polyoxometalates inside single-walled carbon nanotubes (SWNTs) for target catalytic regulation. Theoretical modeling predicts the confined polyoxomolybdates are able to induce biaxial tensile strains of SWNTs for more stable interaction with iron phthalocyanine (FePc) and tailor the charge distribution and coordination environment of targetable FeN<sub>4</sub> sites, leading to improved catalytic activity toward oxygen reduction reaction (ORR). The polyoxomolybdates are confined in the SWNTs <em>via</em> redox-driven encapsulation mechanism with a POM encapsulation efficiency of about 21 %. The constructed FePc/SWNT@POM molecule catalyst exhibits a high half-wave potential of 0.90 V, excellent stability and methanol tolerance in alkaline medium. The zinc-air battery also presents prominent charge-discharge ability and long-term durability over 400 h with a peak power density of 190.8 mW cm<sup>–2</sup>.</p></div>\",\"PeriodicalId\":306,\"journal\":{\"name\":\"Energy Storage Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.9000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Energy Storage Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2405829724006032\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy Storage Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2405829724006032","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Heightening polyoxometalate encapsulation efficiency for biaxial strain-induced catalytic activity boosting
Controllable assembly of polyoxometalates (POMs) in confined nanochannels is crucial to understand the host-guest structures and tailor the emerging properties for applications. Here, we report the encapsulation of polyoxometalates inside single-walled carbon nanotubes (SWNTs) for target catalytic regulation. Theoretical modeling predicts the confined polyoxomolybdates are able to induce biaxial tensile strains of SWNTs for more stable interaction with iron phthalocyanine (FePc) and tailor the charge distribution and coordination environment of targetable FeN4 sites, leading to improved catalytic activity toward oxygen reduction reaction (ORR). The polyoxomolybdates are confined in the SWNTs via redox-driven encapsulation mechanism with a POM encapsulation efficiency of about 21 %. The constructed FePc/SWNT@POM molecule catalyst exhibits a high half-wave potential of 0.90 V, excellent stability and methanol tolerance in alkaline medium. The zinc-air battery also presents prominent charge-discharge ability and long-term durability over 400 h with a peak power density of 190.8 mW cm–2.
期刊介绍:
Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field.
Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy.
Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.