本文主要研究内容
作者袁满（2019）在《氮掺杂碳包裹钴纳米颗粒催化剂的制备及其催化芳香硝基化合物氢化性能研究》一文中研究指出：随着纳米技术的发展,纳米催化剂在非均相催化领域占据越来越重要的地位。钴作为过渡金属的一员,其低成本、相对低毒性和独特的反应特性使得钴基催化剂在非均相催化领域受到极大的关注。设计构建高效负载型钴基纳米催化剂是多相催化领域的研究热点。相比较于纯碳材料,氮掺杂碳材料在导电性、表面活性以及表面亲水性等方面都有很大的优势。作为催化剂载体时,氮掺杂碳材料独特的表面化学性质能够很好地改善负载型金属催化剂活性、选择性和稳定性。氮掺杂碳材料负载钴纳米颗粒催化剂应运而生,其独特高效的催化性能使其在催化加氢方面备受关注。然而,钴纳米颗粒裸露负载型催化剂仍无法达到贵金属负载性催化剂的高效催化活性和耐腐蚀性,这极大地限制了它的应用与发展。为了进一步拓展氮掺杂碳材料负载钴纳米颗粒催化剂在催化领域的应用,氮掺杂碳包覆钴纳米颗粒催化剂被开发出来和研究。本论文设计了以廉价前驱材料通过简单的策略制备氮掺杂碳包覆钴纳米颗粒催化剂。钴纳米颗粒被均匀高分散地限制在碳基质中。氮碳壳层在空间上将钴纳米颗粒隔断,有效地避免了钴的团聚、烧结和流失。钴纳米颗粒与氮碳壳层之间的强相互作用使得表面氮碳壳表现出类金属性质。这使得氮掺杂碳包覆钴纳米颗粒催化剂在芳香硝基化合物的催化加氢中表现了优异的催化活性和稳定性。所制备的催化剂的特殊结构对催化剂性能和稳定性作出了极大贡献。在芳香硝基化合物的绿色可持续和超高效率的催化加氢方面,本研究制备的一系列氮掺杂碳包覆钴纳米颗粒催化剂有着优异的催化性能。(1)在使用甲酸作为氢源的芳香硝基化合物催化转移加氢体系中,设计合成的Co@NC-600催化剂有效地克服了甲酸对钴的腐蚀。所制备的催化剂在无碱体系中有着优异的催化活性和稳定性。该工作开拓了芳香硝基化合物的可持续性催化氢化,拓展了钴基催化剂在该领域的应用。(2)此外,我们设计构建了一种yolk-shell结构的多级孔纳米反应器,通过催化剂结构的调控达到了媲美贵金属催化效率的芳香硝基化合物加氢催化剂。该工作中制备的Co@ZDC@mC-700纳米反应器催化剂在以水合肼作为氢源催化芳香硝基化合物加氢的反应中表现出了超高的催化效率,其催化活性几乎是同类型催化剂的50倍。
Abstract
sui zhao na mi ji shu de fa zhan ,na mi cui hua ji zai fei jun xiang cui hua ling yu zhan ju yue lai yue chong yao de de wei 。gu zuo wei guo du jin shu de yi yuan ,ji di cheng ben 、xiang dui di du xing he du te de fan ying te xing shi de gu ji cui hua ji zai fei jun xiang cui hua ling yu shou dao ji da de guan zhu 。she ji gou jian gao xiao fu zai xing gu ji na mi cui hua ji shi duo xiang cui hua ling yu de yan jiu re dian 。xiang bi jiao yu chun tan cai liao ,dan can za tan cai liao zai dao dian xing 、biao mian huo xing yi ji biao mian qin shui xing deng fang mian dou you hen da de you shi 。zuo wei cui hua ji zai ti shi ,dan can za tan cai liao du te de biao mian hua xue xing zhi neng gou hen hao de gai shan fu zai xing jin shu cui hua ji huo xing 、shua ze xing he wen ding xing 。dan can za tan cai liao fu zai gu na mi ke li cui hua ji ying yun er sheng ,ji du te gao xiao de cui hua xing neng shi ji zai cui hua jia qing fang mian bei shou guan zhu 。ran er ,gu na mi ke li luo lou fu zai xing cui hua ji reng mo fa da dao gui jin shu fu zai xing cui hua ji de gao xiao cui hua huo xing he nai fu shi xing ,zhe ji da de xian zhi le ta de ying yong yu fa zhan 。wei le jin yi bu ta zhan dan can za tan cai liao fu zai gu na mi ke li cui hua ji zai cui hua ling yu de ying yong ,dan can za tan bao fu gu na mi ke li cui hua ji bei kai fa chu lai he yan jiu 。ben lun wen she ji le yi lian jia qian qu cai liao tong guo jian chan de ce lve zhi bei dan can za tan bao fu gu na mi ke li cui hua ji 。gu na mi ke li bei jun yun gao fen san de xian zhi zai tan ji zhi zhong 。dan tan ke ceng zai kong jian shang jiang gu na mi ke li ge duan ,you xiao de bi mian le gu de tuan ju 、shao jie he liu shi 。gu na mi ke li yu dan tan ke ceng zhi jian de jiang xiang hu zuo yong shi de biao mian dan tan ke biao xian chu lei jin shu xing zhi 。zhe shi de dan can za tan bao fu gu na mi ke li cui hua ji zai fang xiang xiao ji hua ge wu de cui hua jia qing zhong biao xian le you yi de cui hua huo xing he wen ding xing 。suo zhi bei de cui hua ji de te shu jie gou dui cui hua ji xing neng he wen ding xing zuo chu le ji da gong suo 。zai fang xiang xiao ji hua ge wu de lu se ke chi xu he chao gao xiao lv de cui hua jia qing fang mian ,ben yan jiu zhi bei de yi ji lie dan can za tan bao fu gu na mi ke li cui hua ji you zhao you yi de cui hua xing neng 。(1)zai shi yong jia suan zuo wei qing yuan de fang xiang xiao ji hua ge wu cui hua zhuai yi jia qing ti ji zhong ,she ji ge cheng de Co@NC-600cui hua ji you xiao de ke fu le jia suan dui gu de fu shi 。suo zhi bei de cui hua ji zai mo jian ti ji zhong you zhao you yi de cui hua huo xing he wen ding xing 。gai gong zuo kai ta le fang xiang xiao ji hua ge wu de ke chi xu xing cui hua qing hua ,ta zhan le gu ji cui hua ji zai gai ling yu de ying yong 。(2)ci wai ,wo men she ji gou jian le yi chong yolk-shelljie gou de duo ji kong na mi fan ying qi ,tong guo cui hua ji jie gou de diao kong da dao le pi mei gui jin shu cui hua xiao lv de fang xiang xiao ji hua ge wu jia qing cui hua ji 。gai gong zuo zhong zhi bei de Co@ZDC@mC-700na mi fan ying qi cui hua ji zai yi shui ge jing zuo wei qing yuan cui hua fang xiang xiao ji hua ge wu jia qing de fan ying zhong biao xian chu le chao gao de cui hua xiao lv ,ji cui hua huo xing ji hu shi tong lei xing cui hua ji de 50bei 。
论文参考文献
论文详细介绍
论文作者分别是来自兰州大学的袁满，发表于刊物兰州大学2019-07-29论文，是一篇关于氮掺杂碳材料论文,钴基纳米催化剂论文,包覆型论文,芳香硝基化合物论文,催化加氢论文,兰州大学2019-07-29论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自兰州大学2019-07-29论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：氮掺杂碳材料论文; 钴基纳米催化剂论文; 包覆型论文; 芳香硝基化合物论文; 催化加氢论文; 兰州大学2019-07-29论文;