{"title":"钴配合物催化过氧化氢分解的研究","authors":"R.V. Prasad, N.V. Thakkar","doi":"10.1016/0304-5102(94)00063-8","DOIUrl":null,"url":null,"abstract":"<div><p>The role of cobalt(II) and its complexes with 1-phenyl 1-hydrazonyl 2-oximinopropanedione (HPHOPD) as homogeneous and heterogeneous catalysts in the decomposition of hydrogen peroxide has been investigated by measuring evolution of oxygen at different time intervals in the temperature range 35–60°C. Enhanced activity is observed with Co(PHOPD)<sub>2</sub> used as heterogeneous catalyst and with cobalt:HPHOPD (1:1) complex heterogenized by adsorption on alumina, while in case of solutions of cobalt(II) chloride and cobalt:HPHOPD (1:1), used as homogeneous catalysts, the activity is comparatively low and negligible respectively. The reaction rate, in general, is found to increase with increase in temperature and quantity of the catalyst. Various thermodynamic parameters have been calculated. The adduct formation with a heterocyclic base like pyridine, 3-methyl pyridine, chloro pyridine or quinoline is found to inhibit the catalytic activity of Co(PHOPD)<sub>2</sub>. The probable reaction mechanisms have been suggested for Co(PHOPD)<sub>2</sub> and alumina-Co<sup>II</sup>-HPHOPD as catalysts.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"92 1","pages":"Pages 9-20"},"PeriodicalIF":0.0000,"publicationDate":"1994-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)00063-8","citationCount":"32","resultStr":"{\"title\":\"Study of cobalt complexes as catalysts in the decomposition of hydrogen peroxide\",\"authors\":\"R.V. Prasad, N.V. Thakkar\",\"doi\":\"10.1016/0304-5102(94)00063-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The role of cobalt(II) and its complexes with 1-phenyl 1-hydrazonyl 2-oximinopropanedione (HPHOPD) as homogeneous and heterogeneous catalysts in the decomposition of hydrogen peroxide has been investigated by measuring evolution of oxygen at different time intervals in the temperature range 35–60°C. Enhanced activity is observed with Co(PHOPD)<sub>2</sub> used as heterogeneous catalyst and with cobalt:HPHOPD (1:1) complex heterogenized by adsorption on alumina, while in case of solutions of cobalt(II) chloride and cobalt:HPHOPD (1:1), used as homogeneous catalysts, the activity is comparatively low and negligible respectively. The reaction rate, in general, is found to increase with increase in temperature and quantity of the catalyst. Various thermodynamic parameters have been calculated. The adduct formation with a heterocyclic base like pyridine, 3-methyl pyridine, chloro pyridine or quinoline is found to inhibit the catalytic activity of Co(PHOPD)<sub>2</sub>. The probable reaction mechanisms have been suggested for Co(PHOPD)<sub>2</sub> and alumina-Co<sup>II</sup>-HPHOPD as catalysts.</p></div>\",\"PeriodicalId\":16567,\"journal\":{\"name\":\"分子催化\",\"volume\":\"92 1\",\"pages\":\"Pages 9-20\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0304-5102(94)00063-8\",\"citationCount\":\"32\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"分子催化\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0304510294000638\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Chemical Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304510294000638","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
Study of cobalt complexes as catalysts in the decomposition of hydrogen peroxide
The role of cobalt(II) and its complexes with 1-phenyl 1-hydrazonyl 2-oximinopropanedione (HPHOPD) as homogeneous and heterogeneous catalysts in the decomposition of hydrogen peroxide has been investigated by measuring evolution of oxygen at different time intervals in the temperature range 35–60°C. Enhanced activity is observed with Co(PHOPD)2 used as heterogeneous catalyst and with cobalt:HPHOPD (1:1) complex heterogenized by adsorption on alumina, while in case of solutions of cobalt(II) chloride and cobalt:HPHOPD (1:1), used as homogeneous catalysts, the activity is comparatively low and negligible respectively. The reaction rate, in general, is found to increase with increase in temperature and quantity of the catalyst. Various thermodynamic parameters have been calculated. The adduct formation with a heterocyclic base like pyridine, 3-methyl pyridine, chloro pyridine or quinoline is found to inhibit the catalytic activity of Co(PHOPD)2. The probable reaction mechanisms have been suggested for Co(PHOPD)2 and alumina-CoII-HPHOPD as catalysts.
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