等离子体沉积 CoO-(碳基)薄膜纳米催化剂:纳米级 p-n 异质结对二氧化碳甲烷化活性的影响

IF 3.8 3区 化学 Q2 CHEMISTRY, PHYSICAL
Catalysts Pub Date : 2024-01-04 DOI:10.3390/catal14010038
Niloofar Mohammadpour, H. Kierzkowska‐Pawlak, J. Balcerzak, P. Uznański, J. Tyczkowski
{"title":"等离子体沉积 CoO-(碳基)薄膜纳米催化剂:纳米级 p-n 异质结对二氧化碳甲烷化活性的影响","authors":"Niloofar Mohammadpour, H. Kierzkowska‐Pawlak, J. Balcerzak, P. Uznański, J. Tyczkowski","doi":"10.3390/catal14010038","DOIUrl":null,"url":null,"abstract":"Addressing the challenges associated with the highly exothermic nature of CO2 methanation, there is considerable interest in innovative catalyst designs on structural metallic supports. One promising solution in this regard involves thin films containing cobalt oxide within a carbon matrix, fabricated using the cold plasma deposition method (PECVD). The objective of this study was to search for a relationship between the molecular structure, nanostructure, and electronic structure of such films and their catalytic activity. The investigations employed various techniques, including X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), X-ray diffraction (XRD), UV-VIS absorption, and catalytic tests in the CO2 methanation process. Three types of films were tested: untreated as-deposited (ad-CoO), thermally post-treated (TT-CoO), and argon plasma post-treated (PT-CoO) films. Among these, TT-CoO exhibited the most favorable catalytic properties, demonstrating a CO2 conversion rate of 83%, CH4 selectivity of 98% at 400 °C, and stability during the catalytic process. This superior performance was attributed to the formation of nanoscale heterojunctions in the TT-CoO film, where p-type CoO nanocrystallites interacted with the n-type carbon matrix. This work provides compelling evidence highlighting the key role of nanoscale heterojunctions in shaping the properties of nanocatalysts in thermal catalysis. These findings suggest promising prospects for designing new catalytic systems by manipulating interactions at the nanoscale.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"52 2","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Plasma-Deposited CoO–(Carbon Matrix) Thin-Film Nanocatalysts: The Impact of Nanoscale p-n Heterojunctions on Activity in CO2 Methanation\",\"authors\":\"Niloofar Mohammadpour, H. Kierzkowska‐Pawlak, J. Balcerzak, P. Uznański, J. Tyczkowski\",\"doi\":\"10.3390/catal14010038\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Addressing the challenges associated with the highly exothermic nature of CO2 methanation, there is considerable interest in innovative catalyst designs on structural metallic supports. One promising solution in this regard involves thin films containing cobalt oxide within a carbon matrix, fabricated using the cold plasma deposition method (PECVD). The objective of this study was to search for a relationship between the molecular structure, nanostructure, and electronic structure of such films and their catalytic activity. The investigations employed various techniques, including X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), X-ray diffraction (XRD), UV-VIS absorption, and catalytic tests in the CO2 methanation process. Three types of films were tested: untreated as-deposited (ad-CoO), thermally post-treated (TT-CoO), and argon plasma post-treated (PT-CoO) films. Among these, TT-CoO exhibited the most favorable catalytic properties, demonstrating a CO2 conversion rate of 83%, CH4 selectivity of 98% at 400 °C, and stability during the catalytic process. This superior performance was attributed to the formation of nanoscale heterojunctions in the TT-CoO film, where p-type CoO nanocrystallites interacted with the n-type carbon matrix. This work provides compelling evidence highlighting the key role of nanoscale heterojunctions in shaping the properties of nanocatalysts in thermal catalysis. These findings suggest promising prospects for designing new catalytic systems by manipulating interactions at the nanoscale.\",\"PeriodicalId\":9794,\"journal\":{\"name\":\"Catalysts\",\"volume\":\"52 2\",\"pages\":\"\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-01-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysts\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.3390/catal14010038\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysts","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.3390/catal14010038","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

摘要

为了应对二氧化碳甲烷化的高放热性所带来的挑战,人们对金属结构支撑物上的创新催化剂设计产生了浓厚的兴趣。这方面一个很有前景的解决方案是使用冷等离子体沉积法(PECVD)在碳基质中制造含有氧化钴的薄膜。本研究的目的是寻找此类薄膜的分子结构、纳米结构和电子结构与其催化活性之间的关系。研究采用了多种技术,包括 X 射线光电子能谱 (XPS)、紫外光电子能谱 (UPS)、X 射线衍射 (XRD)、紫外可见吸收以及二氧化碳甲烷化过程中的催化测试。测试了三种类型的薄膜:未经处理的沉积薄膜(ad-CoO)、热后处理薄膜(TT-CoO)和氩等离子体后处理薄膜(PT-CoO)。其中,TT-CoO 表现出最有利的催化特性,二氧化碳转化率达到 83%,400 °C 时的甲烷选择性达到 98%,并且在催化过程中保持稳定。这种优异的性能归功于 TT-CoO 薄膜中形成的纳米级异质结,其中 p 型 CoO 纳米晶与 n 型碳基质相互作用。这项工作提供了令人信服的证据,凸显了纳米级异质结在热催化中塑造纳米催化剂特性的关键作用。这些发现为通过操纵纳米尺度的相互作用来设计新型催化系统提供了广阔的前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Plasma-Deposited CoO–(Carbon Matrix) Thin-Film Nanocatalysts: The Impact of Nanoscale p-n Heterojunctions on Activity in CO2 Methanation
Addressing the challenges associated with the highly exothermic nature of CO2 methanation, there is considerable interest in innovative catalyst designs on structural metallic supports. One promising solution in this regard involves thin films containing cobalt oxide within a carbon matrix, fabricated using the cold plasma deposition method (PECVD). The objective of this study was to search for a relationship between the molecular structure, nanostructure, and electronic structure of such films and their catalytic activity. The investigations employed various techniques, including X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), X-ray diffraction (XRD), UV-VIS absorption, and catalytic tests in the CO2 methanation process. Three types of films were tested: untreated as-deposited (ad-CoO), thermally post-treated (TT-CoO), and argon plasma post-treated (PT-CoO) films. Among these, TT-CoO exhibited the most favorable catalytic properties, demonstrating a CO2 conversion rate of 83%, CH4 selectivity of 98% at 400 °C, and stability during the catalytic process. This superior performance was attributed to the formation of nanoscale heterojunctions in the TT-CoO film, where p-type CoO nanocrystallites interacted with the n-type carbon matrix. This work provides compelling evidence highlighting the key role of nanoscale heterojunctions in shaping the properties of nanocatalysts in thermal catalysis. These findings suggest promising prospects for designing new catalytic systems by manipulating interactions at the nanoscale.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Catalysts
Catalysts CHEMISTRY, PHYSICAL-
CiteScore
6.80
自引率
7.70%
发文量
1330
审稿时长
3 months
期刊介绍: Catalysts (ISSN 2073-4344) is an international open access journal of catalysts and catalyzed reactions. Catalysts publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信