催化学报 ›› 2026, Vol. 85: 143-152.DOI: 10.1016/S1872-2067(26)65027-9

• 论文 • 上一篇    下一篇

Ni1-MoS2单原子催化剂用于CO2加氢制甲醇的优越性: 密度泛函理论与微观动力学研究

陈兰兰a,1, 圣利b,1, 周亚男c, 罗其全d, 李震宇a,e(), 张文华a,f(), 杨金龙a,e   

  1. a 中国科学技术大学精准智能化学全国重点实验室, 安徽合肥 230026
    b 合肥市计量测试中心, 安徽合肥 230088
    c 宁波大学材料科学与化学工程学院, 浙江宁波 315211
    d 安徽大学物质科学与信息技术研究院, 安徽合肥 230601
    e 中国科学技术大学化学物理系, 安徽合肥 230026
    f 中国科学技术大学合肥国家实验室, 安徽合肥 230088
  • 收稿日期:2025-09-05 接受日期:2026-01-08 出版日期:2026-06-18 发布日期:2026-05-18
  • 通讯作者: *电子信箱: whhzhang@ustc.edu.cn (张文华),
    zyli@ustc.edu.cn (李震宇).
  • 作者简介:

    1共同第一作者.

  • 基金资助:
    国家自然科学基金(22373092);国家重点研发计划(2023YFA1509000);量子科学与技术创新计划(2021ZD0303306);中央高校基础研究基金(WK2060000060);中国科学院“智能科学家”专项

Unraveling the superiority of Ni1-MoS2 single-atom catalyst in CO2 hydrogenation to methanol: A DFT combined microkinetic study

Lanlan Chena,1, Li Shengb,1, Yanan Zhouc, Qiquan Luod, Zhenyu Lia,e(), Wenhua Zhanga,f(), Jinlong Yanga,e   

  1. a State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China
    b Hefei Metrology and Testing Center, Hefei 230088, Anhui, China
    c School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
    d Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui, China
    e Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, Anhui, China
    f Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, Anhui, China
  • Received:2025-09-05 Accepted:2026-01-08 Online:2026-06-18 Published:2026-05-18
  • Contact: *E-mail: whhzhang@ustc.edu.cn (W. Zhang),
    zyli@ustc.edu.cn (Z. Li).
  • About author:

    1Contributed equally to this work.

  • Supported by:
    National Natural Science Foundation of China(22373092);National Key Research and Development Program of China(2023YFA1509000);Innovation Program for Quantum Science and Technology(2021ZD0303306);Fundamental Research Funds for the Central Universities(WK2060000060);robotic AI-Scientist platform of Chinese Academy of Science

摘要:

将二氧化碳(CO2)高效催化转化为甲醇, 是实现“碳中和”目标及碳资源循环利用的关键途径之一. 然而, 现有催化体系普遍存在贵金属依赖、反应条件苛刻、产物选择性低等问题, 开发兼具高活性、高选择性与良好稳定性的新型催化剂是当前的核心挑战. 单原子催化剂因其最大的原子利用率和独特的电子结构, 为该领域带来了新的机遇. 本文通过系统的理论计算与微观动力学研究, 不仅筛选出一种性能优异的非贵金属催化剂, 更阐明了其反应机制, 为理性设计面向CO2加氢制甲醇的高效单原子催化剂提供了重要的理论框架与材料平台, 对推动该技术的低成本和规模化发展具有重要意义.

本工作基于CO2加氢制甲醇的机理, 结合密度泛函理论(DFT)计算与微观动力学模拟, 对26种过渡金属单原子掺杂的平面MoS2催化剂(M1-MoS2, M = Sc-Zn, Y-Cd, Ta-Au)进行了系统性筛选与性能评估. 结果表明, 通过对比各M1-MoS2体系的形成能、氢原子在金属单原子直接键合的S位点上的吸附能以及氢气在M1-MoS2表面的解离能, 筛选出Ni1(Cu1, Zn1, Rh1, Pd1, Pt1)-MoS2作为CO2加氢制甲醇的潜在催化剂, 并确定其活性位点为S原子. 深入的机理研究表明, CO2加氢制甲醇的关键含碳反应中间体依次为*COOH, *C(OH)2, *CH(OH)2, *CHOH和*CH2OH. 为了更直观地模拟实际反应条件下的催化性能, 采用实验反应条件(210 °C, 8 bar CO2, 24 bar H2)进行了微观动力学模拟, 基于六种催化剂中H2解离能垒, 活性位点与非活位点之间氢扩散能垒以及表面不同种类氢物种与不同含碳中间体反应的能垒和反应能, 结果显示Ni1-MoS2的甲醇生成速率是已报道的、经实验验证的Pt1-MoS2催化剂的26.76倍, 并且对甲醇产物表现出极高的选择性, 有效抑制了甲酸、CO、甲烷等副产物的生成, 反应物CO2的分压对甲醇生成无显著影响, 而H2的分压对生成速率呈负相关影响, 其中各个催化剂表面含碳物种浓度最高的均为*CH2OH. 由此可见, DFT与微观动力学研究的结合有助于寻找高效CO2催化剂, Ni1-MoS2是一种极具应用前景的高效、低成本CO2加氢制甲醇单原子催化剂, 其性能显著优于Pt1-MoS2.

综上, 本工作所建立的理论筛选方法与机理分析框架, 为高效单原子催化剂的理性设计提供了理论框架与筛选方法, 有望加速推动CO2资源化利用从基础研究走向工业应用.

关键词: 密度泛函理论, 微观动力学分析, 单原子掺杂MoS2, CO2还原, 甲醇

Abstract:

Converting CO2 to methanol presents a crucial pathway for achieving carbon neutrality, yet designing highly active and selective nano catalysts remain challenging. In this work, we report a combined density functional theory and microkinetic study screening 26 transition metal single atoms (Sc-Zn, Y-Cd, Ta-Au) atomically dispersed in MoS2 nanosheet (M1-MoS2) for CO2 hydrogenation to methanol. Among these, Ni1-MoS2 was identified as a promising candidate, exhibiting excellent stability and hydrogen dissociation capability. The reaction proceeds through a dissociative hydrogenation mechanism via key intermediates including *COOH, *C(OH)2, *CH(OH)2, *CHOH, and *CH2OH. Microkinetic simulations reveal that Ni1-MoS2 significantly outperforms the experimentally validated Pt1-MoS2, demonstrating a 26.76-fold enhancement in formation rate and high selectivity under industrial relevant conditions (210 °C, 8 bar CO2, 24 bar H2). This work not only highlights Ni1-MoS2 as a highly efficient and cost-effective catalyst but also provides a mechanistic and kinetic framework for accelerating the design of single-atom catalysts for CO2 conversion.

Key words: Density functional theory, Microkinetic analysis, Single metal atom doped MoS2, CO2 hydrogenation, Methanol