{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":1,"startPagecode":1},"records":[{"abstractinfo":"通过用NH4NO3溶液处理商业硅胶,制备了不同pH值的硅胶载体和一系列Co/SiO2催化剂,并考察了催化剂的还原性能. 结果表明,载体pH值的降低,使Co/SiO2催化剂在工业还原条件(673 K)下的还原度从30.9%提高到72.4%. 用TPR和EXAFS技术研究了Co/SiO2催化剂的还原过程. 结果表明,催化剂较高的还原度是由于减弱了还原过程中生成的CoO与载体硅胶之间的相互作用,从而促进了CoO的进一步还原. 用FT-IR技术研究了不同pH值硅胶表面硅醇基的存在状态,发现酸性较强的载体上易于发生表面硅醇基间的缩合作用. 根据实验结果提出了Co/SiO2催化剂的还原机理.","authors":[{"authorName":"高海燕","id":"74712d14-de01-41ae-b642-092ff61522e1","originalAuthorName":"高海燕"},{"authorName":"<span style=\"color:red\">杨文书</span>","id":"a4d3bbf2-94e7-4074-ba73-766d0889101b","originalAuthorName":"杨文书"},{"authorName":"相宏伟","id":"d4bc727d-fe62-4d65-bc7f-f0631acbbda8","originalAuthorName":"相宏伟"},{"authorName":"李永旺","id":"c4eb3eb9-042a-43ee-a156-47fae17da08a","originalAuthorName":"李永旺"},{"authorName":"孙予罕","id":"6a65410d-2e69-4622-95ad-ed3040b59aaa","originalAuthorName":"孙予罕"},{"authorName":"刘涛","id":"47225a0c-ed76-4f54-85a7-8eabeda62307","originalAuthorName":"刘涛"},{"authorName":"谢亚宁","id":"650a9c91-7ff3-46f1-8edc-d3c13095e6f5","originalAuthorName":"谢亚宁"},{"authorName":"张静","id":"1678f477-e3f9-4a1a-9728-c62b0024f455","originalAuthorName":"张静"},{"authorName":"胡天斗","id":"d69a7692-5dd5-46d9-8771-f473786e1aeb","originalAuthorName":"胡天斗"}],"doi":"","fpage":"430","id":"a9c8f09e-4f2f-4347-b851-b7e15cb24e4c","issue":"5","journal":{"abbrevTitle":"CHXB","coverImgSrc":"journal/img/cover/CHXB.jpg","id":"18","issnPpub":"0253-9837","publisherId":"CHXB","title":"催化学报   "},"keywords":[{"id":"f0975ed7-8443-42e0-a130-e61614d5d256","keyword":"钴","originalKeyword":"钴"},{"id":"9eaabda8-a36f-4521-956b-23d36adb0835","keyword":"硅胶","originalKeyword":"硅胶"},{"id":"ae358909-b253-4bf7-bc19-96c8fe8e93cf","keyword":"负载型催化剂","originalKeyword":"负载型催化剂"},{"id":"2190c65e-b5a5-4fb3-a183-0acc79fe6d52","keyword":"还原性","originalKeyword":"还原性"},{"id":"71be1dc5-b747-43bc-a681-828d00184ed1","keyword":"pH值","originalKeyword":"pH值"}],"language":"zh","publisherId":"cuihuaxb200205011","title":"pH值对Co/SiO2催化剂还原性能的影响","volume":"23","year":"2002"},{"abstractinfo":"HMS介孔分子筛经水热处理得到无定形SiO2,分别以无定形SiO2和HMS为载体,用浸渍法制得了15%Co/SiO2和15%Co/HMS催化剂. 研究表明: 氧化态Co/SiO2和Co/HMS催化剂中的钴物种以Co3O4形式存在,且Co3O4晶粒粒径均较相应催化剂的孔径大,故有部分钴物种存在于催化剂外表面; 氧化态Co/HMS催化剂中的钴物种堵塞孔道较为严重; Co/HMS催化剂中存在较强的金属-载体相互作用,因此Co/HMS催化剂较Co/SiO2催化剂难还原; Co/HMS催化剂还原后具有较高的钴分散度,使其具有优异的费-托合成反应性能.","authors":[{"authorName":"<span style=\"color:red\">杨文书</span>","id":"7a9b80da-3394-4e5f-947e-e8ae862c7f51","originalAuthorName":"杨文书"},{"authorName":"房鼎业","id":"04297d4d-b9a9-44db-8040-8373ee277656","originalAuthorName":"房鼎业"},{"authorName":"相宏伟","id":"64ebc7a3-b991-41eb-916e-7e958c66af93","originalAuthorName":"相宏伟"},{"authorName":"李永旺","id":"e6231627-9366-471a-8239-7e9e42eabce6","originalAuthorName":"李永旺"},{"authorName":"刘继森","id":"b416da0b-db59-4d08-bc7b-d757fe872cad","originalAuthorName":"刘继森"}],"doi":"","fpage":"329","id":"bc6c9aa6-0b45-4a44-b4e9-93fc822908e3","issue":"4","journal":{"abbrevTitle":"CHXB","coverImgSrc":"journal/img/cover/CHXB.jpg","id":"18","issnPpub":"0253-9837","publisherId":"CHXB","title":"催化学报   "},"keywords":[{"id":"51719304-3861-4c88-a73c-97fac7564e3a","keyword":"HMS分子筛","originalKeyword":"HMS分子筛"},{"id":"2ef28ad6-f258-486c-9d4e-57759fde909b","keyword":"无定形二氧化硅","originalKeyword":"无定形二氧化硅"},{"id":"81209e4d-0576-4b54-b584-2219ddfa2989","keyword":"钴基催化剂","originalKeyword":"钴基催化剂"},{"id":"dfc02137-5946-4aaf-94d1-4d49e73ec236","keyword":"费-托合成","originalKeyword":"费-托合成"}],"language":"zh","publisherId":"cuihuaxb200504016","title":"Co/HMS和Co/SiO2催化剂的表征及在费-托合成反应中的催化性能","volume":"26","year":"2005"}],"totalpage":1,"totalrecord":2}