Copper based catalysts have high potential for the substituent of noble-metal based catalysts as their high selectivity and moderate activity for selective hydrogenation reaction;however,achieving further high catalyt...Copper based catalysts have high potential for the substituent of noble-metal based catalysts as their high selectivity and moderate activity for selective hydrogenation reaction;however,achieving further high catalytic stability is very difficult.In this work,the carbonization process of Cu-based organic frameworks was explored for the synthesis of highly-dispersed Cu supported by hierarchically porous carbon with high catalytic performance for selective hydrogenation of 1,3-butadiene.The porous hierarchy of carbon support and the dispersion of copper nanoparticles can be precisely tuned by controlling the carbonization process.The resultant catalyst carbonized at 600°C exhibits a rather low reaction temperature at 75°C for 100%butadiene conversion with 100%selectivity to butenes,due to its reasonable porous hierarchy and highly-dispersed copper sites.More importantly,unprecedentedly stability of the corresponding Cu catalyst was firstly observed for selective 1,3-butadiene hydrogenation,with both 100%butadiene conversion and 100%butenes selectivity over 120 h of reaction at 75°C.This study verifies that a simply control the carbonization process of metal organic frameworks can be an effective way to obtain Cu-based catalysts with superior catalytic performance for selective hydrogenation reaction.展开更多
访谈整理者按:鲁惟一(Michael Loewe),1922年生于英国牛津,著名历史学家和汉学家,研究领域为中国汉代史。剑桥大学荣休教师、克莱尔学堂(Clare Hall)院士。鲁惟一本科就读于牛津大学,1942年离开牛津,时值二战,在政府通讯总部接受训练,...访谈整理者按:鲁惟一(Michael Loewe),1922年生于英国牛津,著名历史学家和汉学家,研究领域为中国汉代史。剑桥大学荣休教师、克莱尔学堂(Clare Hall)院士。鲁惟一本科就读于牛津大学,1942年离开牛津,时值二战,在政府通讯总部接受训练,破译日军密码。期间开始学习汉语,并于1947年前往中国,回国后在伦敦大学亚非学院攻读汉语本科学位。1956-1963年间任职于伦敦大学,1963年获伦敦亚非学院博士学位后入职剑桥大学,直至1990年退休。鲁惟一著有《汉代行政记录》(Records of Han Administration)、《汉代的信仰、神话和理性》(Chinese ldeas of Life and Death:Faith,Myth and Reason in the Han Period)等,编撰《中国古代典籍导读》(Early Chinese Texts:A Bibliographical Guide)、合作编撰《剑桥中国秦汉史》(The Cambridge History of China Volume l:The Ch'in and Han Empires,221 B.C.-A.D.220)及《剑桥中国上古史》(The Cambridge History of Ancient China)。2019年8月20日,胡司德与赵静一在英国剑桥格兰彻斯特村(Grantchester,Cambridge,UK)对话鲁惟一,探讨其编撰《剑桥中国上古史》的前前后后、从事中国研究的经历、感受以及治学方法。展开更多
文摘Copper based catalysts have high potential for the substituent of noble-metal based catalysts as their high selectivity and moderate activity for selective hydrogenation reaction;however,achieving further high catalytic stability is very difficult.In this work,the carbonization process of Cu-based organic frameworks was explored for the synthesis of highly-dispersed Cu supported by hierarchically porous carbon with high catalytic performance for selective hydrogenation of 1,3-butadiene.The porous hierarchy of carbon support and the dispersion of copper nanoparticles can be precisely tuned by controlling the carbonization process.The resultant catalyst carbonized at 600°C exhibits a rather low reaction temperature at 75°C for 100%butadiene conversion with 100%selectivity to butenes,due to its reasonable porous hierarchy and highly-dispersed copper sites.More importantly,unprecedentedly stability of the corresponding Cu catalyst was firstly observed for selective 1,3-butadiene hydrogenation,with both 100%butadiene conversion and 100%butenes selectivity over 120 h of reaction at 75°C.This study verifies that a simply control the carbonization process of metal organic frameworks can be an effective way to obtain Cu-based catalysts with superior catalytic performance for selective hydrogenation reaction.
文摘访谈整理者按:鲁惟一(Michael Loewe),1922年生于英国牛津,著名历史学家和汉学家,研究领域为中国汉代史。剑桥大学荣休教师、克莱尔学堂(Clare Hall)院士。鲁惟一本科就读于牛津大学,1942年离开牛津,时值二战,在政府通讯总部接受训练,破译日军密码。期间开始学习汉语,并于1947年前往中国,回国后在伦敦大学亚非学院攻读汉语本科学位。1956-1963年间任职于伦敦大学,1963年获伦敦亚非学院博士学位后入职剑桥大学,直至1990年退休。鲁惟一著有《汉代行政记录》(Records of Han Administration)、《汉代的信仰、神话和理性》(Chinese ldeas of Life and Death:Faith,Myth and Reason in the Han Period)等,编撰《中国古代典籍导读》(Early Chinese Texts:A Bibliographical Guide)、合作编撰《剑桥中国秦汉史》(The Cambridge History of China Volume l:The Ch'in and Han Empires,221 B.C.-A.D.220)及《剑桥中国上古史》(The Cambridge History of Ancient China)。2019年8月20日,胡司德与赵静一在英国剑桥格兰彻斯特村(Grantchester,Cambridge,UK)对话鲁惟一,探讨其编撰《剑桥中国上古史》的前前后后、从事中国研究的经历、感受以及治学方法。
