Grzegorz Słowik, Marek Rotko, Janusz Ryczkowski, Magdalena Greluk
{"title":"用 Fe 改性 Cu/CeO2 催化剂进行甲醇蒸汽转化制氢。","authors":"Grzegorz Słowik, Marek Rotko, Janusz Ryczkowski, Magdalena Greluk","doi":"10.3390/molecules29163963","DOIUrl":null,"url":null,"abstract":"<p><p>Fe-modified Cu catalysts with CeO<sub>2</sub> support, prepared by the impregnation method, were subjected to physicochemical analysis and catalytic tests in the steam reforming of methanol (SRM). Physicochemical studies of the catalysts were carried out using the XRF, TEM, STEM-EDS, XRD, TPR and nitrogen adsorption/desorption methods. XRD, TEM studies and catalytic tests of the catalysts were carried out at two reduction temperatures, 260 °C and 400 °C, to determine the relationship between the form and oxidation state of the active phase of the catalysts and the catalytic properties of these systems in the SRM. Additionally, the catalysts after the reaction were analysed for the changes in the structure and morphology using TEM methods. The presented results show that the composition of the catalysts, morphology, structure, form and oxidation state of the Cu and Fe active metals in the catalysts and the reaction temperature significantly impact their activity, selectivity and stability in the SRM process. The gradual deactivation of the studied catalysts under SRM conditions could result from the forming of carbon deposits and/or the gradual oxidation of the copper and iron phases under the reaction conditions.</p>","PeriodicalId":19041,"journal":{"name":"Molecules","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11357062/pdf/","citationCount":"0","resultStr":"{\"title\":\"Hydrogen Production from Methanol Steam Reforming over Fe-Modified Cu/CeO<sub>2</sub> Catalysts.\",\"authors\":\"Grzegorz Słowik, Marek Rotko, Janusz Ryczkowski, Magdalena Greluk\",\"doi\":\"10.3390/molecules29163963\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Fe-modified Cu catalysts with CeO<sub>2</sub> support, prepared by the impregnation method, were subjected to physicochemical analysis and catalytic tests in the steam reforming of methanol (SRM). Physicochemical studies of the catalysts were carried out using the XRF, TEM, STEM-EDS, XRD, TPR and nitrogen adsorption/desorption methods. XRD, TEM studies and catalytic tests of the catalysts were carried out at two reduction temperatures, 260 °C and 400 °C, to determine the relationship between the form and oxidation state of the active phase of the catalysts and the catalytic properties of these systems in the SRM. Additionally, the catalysts after the reaction were analysed for the changes in the structure and morphology using TEM methods. The presented results show that the composition of the catalysts, morphology, structure, form and oxidation state of the Cu and Fe active metals in the catalysts and the reaction temperature significantly impact their activity, selectivity and stability in the SRM process. The gradual deactivation of the studied catalysts under SRM conditions could result from the forming of carbon deposits and/or the gradual oxidation of the copper and iron phases under the reaction conditions.</p>\",\"PeriodicalId\":19041,\"journal\":{\"name\":\"Molecules\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2024-08-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11357062/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Molecules\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.3390/molecules29163963\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecules","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.3390/molecules29163963","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
摘要
采用浸渍法制备了以 CeO2 为载体的铁改性铜催化剂,并对其进行了理化分析和甲醇蒸汽转化(SRM)催化试验。使用 XRF、TEM、STEM-EDS、XRD、TPR 和氮吸附/解吸方法对催化剂进行了物理化学研究。在 260 °C 和 400 °C 两种还原温度下对催化剂进行了 XRD、TEM 研究和催化测试,以确定催化剂活性相的形态和氧化态与这些体系在 SRM 中的催化特性之间的关系。此外,还使用 TEM 方法分析了反应后催化剂结构和形态的变化。研究结果表明,催化剂的组成、形态、结构、催化剂中 Cu 和 Fe 活性金属的形态和氧化态以及反应温度对 SRM 工艺中催化剂的活性、选择性和稳定性有显著影响。所研究的催化剂在 SRM 条件下逐渐失活的原因可能是碳沉积的形成和/或铜和铁相在反应条件下的逐渐氧化。
Hydrogen Production from Methanol Steam Reforming over Fe-Modified Cu/CeO2 Catalysts.
Fe-modified Cu catalysts with CeO2 support, prepared by the impregnation method, were subjected to physicochemical analysis and catalytic tests in the steam reforming of methanol (SRM). Physicochemical studies of the catalysts were carried out using the XRF, TEM, STEM-EDS, XRD, TPR and nitrogen adsorption/desorption methods. XRD, TEM studies and catalytic tests of the catalysts were carried out at two reduction temperatures, 260 °C and 400 °C, to determine the relationship between the form and oxidation state of the active phase of the catalysts and the catalytic properties of these systems in the SRM. Additionally, the catalysts after the reaction were analysed for the changes in the structure and morphology using TEM methods. The presented results show that the composition of the catalysts, morphology, structure, form and oxidation state of the Cu and Fe active metals in the catalysts and the reaction temperature significantly impact their activity, selectivity and stability in the SRM process. The gradual deactivation of the studied catalysts under SRM conditions could result from the forming of carbon deposits and/or the gradual oxidation of the copper and iron phases under the reaction conditions.
期刊介绍:
Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.