催化学报 ›› 2022, Vol. 43 ›› Issue (3): 761-770.DOI: 10.1016/S1872-2067(21)63907-4

• 论文 • 上一篇    下一篇

TiO2负载的高分散Cd团簇催化剂高效催化CO2加氢制甲醇

王集杰a,, Jittima Meeprasertb,, 韩哲a,c,, 王欢a, 冯振东a,d, 汤驰洲a,d, 沙峰a,c, 唐珊a,d, 李冠娜e,f, Evgeny A. Pidkob,#(), 李灿a,*()   

  1. a中国科学院大连化学物理研究所, 催化基础国家重点实验室, 辽宁大连 116023, 中国
    b代尔夫特理工大学化学工程系, 代尔夫特, 荷兰
    c南开大学, 材料科学与工程学院, 天津 300350, 中国
    d中国科学院大学, 北京 100049, 中国
    e瓦格宁根大学生物质化学与技术, 瓦格宁根, 荷兰
    f瓦格宁根大学有机化学实验室, 瓦格宁根, 荷兰
  • 收稿日期:2021-05-27 修回日期:2021-05-27 出版日期:2022-03-18 发布日期:2022-02-18
  • 通讯作者: Evgeny A. Pidko,李灿
  • 作者简介:第一联系人:

    共同第一作者

  • 基金资助:
    国家重点研发计划(2017YFB0702800);人工光合成基础科学中心(FReCAP)(22088102);国家自然科学基金(21802139);中国科学院青年创新促进会(2019183)

Highly dispersed Cd cluster supported on TiO2 as an efficient catalyst for CO2 hydrogenation to methanol

Jijie Wanga,, Jittima Meeprasertb,, Zhe Hana,c,, Huan Wanga, Zhendong Fenga,d, Chizhou Tanga,d, Feng Shaa,c, Shan Tanga,d, Guanna Lie,f, Evgeny A. Pidkob,#(), Can Lia,*()   

  1. aState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    bInorganic Systems Engineering, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg, the Netherlands
    cSchool of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
    dUniversity of Chinese Academy of Sciences, Beijing 100049, China
    eBiobased Chemistry and Technology, Wageningen University & Research, the Netherlands
    fLaboratory of Organic Chemistry, Wageningen University & Research, the Netherlands
  • Received:2021-05-27 Revised:2021-05-27 Online:2022-03-18 Published:2022-02-18
  • Contact: Evgeny A. Pidko, Can Li
  • About author:Jijie Wang (State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences) received his Ph.D degree in 2013 from Xiamen University. From 2013 to 2017, he did postdoctoral research at Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, his Co-supervisor is Professor Can Li. At the beginning of 2018, he joined the DICP, where he is now a professor of DICP. His researches mainly focus on catalytic hydrogenation of carbon dioxide to methanol, low carbon olefin, aromatic hydrocarbon, etc. He has made original achievements in the catalytic hydrogenation of carbon dioxide to methanol with high selectivity and stability, and developed ZnO-ZrO2 bimetal oxide solid solution catalyst to open up a new way for the hydrogenation of carbon dioxide. As one of the main contributors, he completed the world's first set of "liquid sunshine methanol" industrial pilot and demonstration projects. He has published 20 papers in Science Advances, Joule and other journals, applied for 14 domestic patents, and 2 international PCT patents. He has received Min Enze Energy and Chemical Industry Award-Youth Progress Award, International Catalytic Conference Young Scientist Award. He joined the editorial board of Chin. J. Catal. in 2020.
    First author contact:

    These authors contributed equally.

  • Supported by:
    National Key R&D Program of China(2017YFB0702800);Fundamental Research Center of Artificial Photosynthesis(22088102);National Natural Science Foundation of China(21802139);Youth Innovation Promotion Association CAS(2019183)

摘要:

近年来, 利用可再生能源分解水制氢进而开展二氧化碳资源化利用的研究引起了学术界和工业界的极大兴趣. 科学层面上它暗合了自然光合作用的理念; 应用层面上它把二氧化碳变废为宝, 既可以得到人类必需的含碳化学品, 又可以实现碳中和. 甲醇被认为是二氧化碳资源化的最佳选择, 可在动力、交通、化工等领域替代煤炭等传统化石能源, 也是良好的载氢分子, 还可作为基础原料生产烯烃、芳烃等大宗化学品. 美国南加州大学Olah教授和中国科学院顾问施春风教授曾先后提出“甲醇经济”和“液态阳光”, 系统阐述了上述理念. 针对CO2加氢制甲醇过程, 开发高效的催化剂仍是当前亟需解决的关键技术. 目前研究较多的铜基催化剂和氧化物催化剂存在转化率和选择性难以兼顾的问题, 近期报道的钴基催化剂等又存在副产物甲烷较高的不足.
本文报道了一种全新的Cd/TiO2催化剂, 其催化CO2加氢的转化率达到15.8%, 甲醇选择性达到81%, 甲烷选择性控制在0.7%以下, 是目前报道的综合性能最优的催化剂之一. 实验发现, Cd在不同载体上催化性能差异极大, Cd/TiO2表现出最佳催化性能, 单一的Cd或TiO2几乎没有活性, 说明Cd和TiO2产生了强烈的相互作用. TiO2载体上Cd含量优化实验表明, 随着Cd含量增加, CO2加氢活性和甲醇选择性均呈现上升趋势, 至3.5%含量时均达极大值; 继续增加Cd含量时, 活性和选择性略有下降. 催化剂的结构表征结果表明, 0.35%Cd/TiO2催化剂中Cd主要以单位点形式存在, 3.5%Cd/TiO2催化剂中Cd主要以团簇形式存在, 7%Cd/TiO2催化剂中Cd则以单位点、团簇及纳米颗粒共存状态存在. X射线光电子能谱结果表明, 0.35%Cd/TiO2和3.5%Cd/TiO2催化剂中单位点Cd和团簇Cd表现为+2价, 而7%Cd/TiO2催化剂中Cd表现为零价, 这可能是因为7%Cd/TiO2催化剂中Cd主要以金属颗粒形式存在. X射线精细结构衍射谱结果表明, Cd团簇除了与Cd单位点相同的Cd‒O键外, 还有少量Cd‒Cd键, 从而表现出独特的电子性能. 原位红外实验表明, Cd/TiO2催化剂上CO2加氢经过HCOO*中间体生成甲醇, 通过DFT计算发现, TiO2负载Cd团簇模型上CO2加氢生成甲醇的决速步能垒只有TiO2负载单位点Cd模型上的一半, 证明了TiO2负载Cd团簇是催化反应的活性中心.

关键词: 二氧化碳加氢, 甲醇, 镉/二氧化钛催化剂, 镉团簇, 二氧化钛

Abstract:

The conversion of CO2 to methanol with high activity and high selectivity remains challenging owing to the kinetic and thermodynamic limitations associated with the low chemical reactivity exhibited by CO2. Herein, we report a novel Cd/TiO2 catalyst exhibiting a methanol selectivity of 81%, a CO2 conversion of 15.8%, and a CH4 selectivity below 0.7%. A combination of experimental and computational studies revealed that the unique electronic properties exhibited by the Cd clusters supported by the TiO2 matrix were responsible for the high selectivity of CO2 hydrogenation to methanol via the HCOO* pathway at the interfacial catalytic sites.

Key words: CO2 hydrogenation, Methanol, Cd/TiO2 catalyst, Cd cluster, TiO2