Chinese Journal of Catalysis ›› 2024, Vol. 64: 44-53.DOI: 10.1016/S1872-2067(24)60100-2

• Articles • Previous Articles     Next Articles

Why the abnormal phenomena of D-band center theory exist? A new BASED theory for surface catalysis and chemistry

Zelong Qiaoa, Run Jianga, Jimmy Yunb,c, Dapeng Caoa,*()   

  1. aState Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
    bQingdao International Academician Park Research Institute, Qingdao 266000, Shandong, China
    cSchool of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
  • Received:2024-05-09 Accepted:2024-06-24 Online:2024-09-18 Published:2024-09-19
  • Contact: * E-mail: caodp@mail.buct.edu.cn (D. Cao).
  • Supported by:
    National Key Research and Development Project(2019YFA0210300);National Natural Science Foundation of China(22372006)

Abstract:

Since the D-band center theory was proposed, it has been widely used in the fields of surface chemistry by almost all researchers, due to its easy understanding, convenient operation and relative accuracy. However, with the continuous development of material systems and modification strategies, researchers have gradually found that D-band center theory is usually effective for large metal particle systems, but for small metal particle systems or semiconductors, such as single atom systems, the opposite conclusion to the D-band center theory is often obtained. To solve the issue above, here we propose a bonding and anti-bonding orbitals stable electron intensity difference (BASED) theory for surface chemistry. The newly-proposed BASED theory can not only successfully explain the abnormal phenomena of D-band center theory, but also exhibits a higher accuracy for prediction of adsorption energy and bond length of intermediates on active sites. Importantly, a new phenomenon of the spin transition state in the adsorption process is observed based on the BASED theory, where the active center atom usually yields an unstable high spin transition state to enhance its adsorption capability in the adsorption process of intermediates when their distance is about 2.5 Å. In short, the BASED theory can be considered as a general principle to understand catalytic mechanism of intermediates on surfaces.

Key words: Surface chemistry, Surface catalysis, D-band center theory, Bonding orbital, Anti-bonding orbital