锌掺杂促进钴基催化剂对糠醛的选择性加氢活性  

Zn doping promotes the selective hydrogenation of furfural over Co-based catalysts

作　　者：黄德金 翟洲啸 赵旭 王瑛 庄长福 HUANG De-jin;ZHAI Zhou-xiao;ZHAO Xu;WANG Ying;ZHUANG Chang-fu(Minzu Normal University of Xingyi,Guizhou 562400,China;College of Chemical Engineering,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]兴义民族师范学院,贵州兴义562400 [2]西南林业大学化学工程学院,云南昆明650224

出　　处：《化学研究与应用》2023年第5期1146-1153,共8页Chemical Research and Application

基　　金：国家自然科学基金项目(31760190)资助;云南省农业联合重点专项(202101BD070001-007)资助;云南省中青年学术和技术带头人后备人才项目(202205AC160052)资助;云南省教育厅项目(2022Y567)资助。

摘　　要：采用金属掺杂策略,通过热解法制备了一种钴锌催化剂(CoZn@NC-600),并将其用于催化糠醛加氢制备糠醇。利用XRD、BET、XPS、TEM等表征手段对催化剂的元素、形貌以及结构进行了分析。结果表明,在120℃,4 h温和条件下,糠醛的转化率为100%,糠醇的选择性接近99%。与不含Zn的单金属催化剂Co@NC-600相比,CoZn@NC-600的催化活性提高了近1.8倍,这归因于Zn的加入不仅增加了比表面积,减小了Co纳米颗粒的尺寸,而且提高了活性位点Co(0)的含量。机理分析表明CoZn@NC-600主要是金属活性位点Co(0)与酸性位点协同催化。CoZn@NC-600催化剂具有较好的稳定性,循环使用3次之后催化性能没有明显降低。这种简单的金属掺杂策略为制备生物质催化材料提供了思路。A cobalt-zinc catalyst(CoZn@NC-600)was prepared by pyrolysis using a metal doping strategy and used to catalyse the hydrogenation of furfural to prepare furfuryl alcohol.The elements,morphology as well as the structure of the catalyst were analysed using XRD,BET,XPS and TEM characterisation.The results showed that the conversion of furfural was 100%and the selectivity of furfuryl alcohol was close to 99%at 120℃for 4 h under mild conditions.Compared with the single metal catalyst Co@NC-600 without Zn,the catalytic activity of CoZn@NC-600 increased by nearly 1.8 times,which was attributed to the addition of Zn not only increased the specific surface area,reduced the size of Co nanoparticles,but also increased the content of active site Co(0).The mechanism analysis shows that CoZn@NC-600 is mainly the synergistic catalysis of metal active site Co(0)and acid site.The CoZn@NC-600 catalyst has good stability,and the catalytic performance is not significantly reduced after 3 cycles.This simple metal doping strategy provides an idea for the preparation of biomass catalytic materials.

关 键 词：钴锌催化剂 掺杂 糠醛 加氢 糠醇 

分 类 号：O614.8[理学—无机化学]