P. R. Jithesh, Robinson P. Ponminiessary, Aleena Varghese, K. V. Greeshma, Anandaram Sreekanth
{"title":"Reduction kinetics of nickel oxide dispersed on MCM-41","authors":"P. R. Jithesh, Robinson P. Ponminiessary, Aleena Varghese, K. V. Greeshma, Anandaram Sreekanth","doi":"10.1007/s11144-024-02741-8","DOIUrl":null,"url":null,"abstract":"<div><p>Nickel oxide was supported on MCM-41 using the precipitation method. Reduction kinetics of supported and unsupported nickel oxide was studied using non-isothermal methods to investigate the change in activation energy and the reduction reaction mechanism. Activation energy was determined using the Kissinger’s method and Straink’s method. Model discrimination was done using the Hancock-Sharp analysis and Malek’s method. The support influenced the reduction kinetics by increasing the activation energy. The reaction mechanism shifted from Avrami-Erofeev model in the unsupported to three-dimensional diffusion-controlled model in the supported nickel oxide. The higher activation energy and the model discrimination in the case of nickel oxide supported on MCM-41 indicates the diffusion of vacancies is the rate limiting step. The reduction mechanism of nickel oxide supported on MCM-41 was proposed in agreement with literature and current study.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"267 - 283"},"PeriodicalIF":1.7000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Reaction Kinetics, Mechanisms and Catalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11144-024-02741-8","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Nickel oxide was supported on MCM-41 using the precipitation method. Reduction kinetics of supported and unsupported nickel oxide was studied using non-isothermal methods to investigate the change in activation energy and the reduction reaction mechanism. Activation energy was determined using the Kissinger’s method and Straink’s method. Model discrimination was done using the Hancock-Sharp analysis and Malek’s method. The support influenced the reduction kinetics by increasing the activation energy. The reaction mechanism shifted from Avrami-Erofeev model in the unsupported to three-dimensional diffusion-controlled model in the supported nickel oxide. The higher activation energy and the model discrimination in the case of nickel oxide supported on MCM-41 indicates the diffusion of vacancies is the rate limiting step. The reduction mechanism of nickel oxide supported on MCM-41 was proposed in agreement with literature and current study.
期刊介绍：
Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields:
-kinetics of homogeneous reactions in gas, liquid and solid phase;
-Homogeneous catalysis;
-Heterogeneous catalysis;
-Adsorption in heterogeneous catalysis;
-Transport processes related to reaction kinetics and catalysis;
-Preparation and study of catalysts;
-Reactors and apparatus.
Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
