Chinese Journal of Catalysis ›› 2024, Vol. 64: 44-53.DOI: 10.1016/S1872-2067(24)60100-2
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Zelong Qiaoa, Run Jianga, Jimmy Yunb,c, Dapeng Caoa,*()
Received:
2024-05-09
Accepted:
2024-06-24
Online:
2024-09-18
Published:
2024-09-19
Contact:
* E-mail: Supported by:
Zelong Qiao, Run Jiang, Jimmy Yun, Dapeng Cao. Why the abnormal phenomena of D-band center theory exist? A new BASED theory for surface catalysis and chemistry[J]. Chinese Journal of Catalysis, 2024, 64: 44-53.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60100-2
Fig. 2. Illustrations of BASED theory. (a) Schematic diagram of molecular orbital conversion to BASED. (b?d) Schematic diagram of three different bonding and anti-bonding orbitals, where the anti-bonding orbitals gradually right shift until they become unoccupied orbitals.
Fig. 3. Adsorption illustrations of different surface models. (a) The O*, OH*, H*, CH3* and NH2* adsorption models of SAC, including all kinds of 3d transition metal SACs. (b) The O*, OH*, OOH* and H* adsorption models of expanded material surface models (Bulk models) after adsorption, including RuO2 (001), Pt (111), Ni (111), Ag (111), and Cu (111) bulk models.
Fig. 4. Theoretical calculation results from different methods. The relationship between adsorption energy of intermediates and εd, OH* (a), O* (b) and H* (c). (d) The red circle represents four types of SACs with anti-D-band center phenomenon. (e) Projected DOS (PDOS) diagram of all 3d metal SACs slab. (f) The relationship between -ICOHP and adsorption energy. The larger the -ICOHP, the stronger the adsorption capability. The relationship between Q and adsorption energy. The larger the Q, the stronger the adsorption capability. (g) The relationship between -ICOHP and bond length. (h) The relationship between Q and bond length.
Fig. 5. Illustrations of STS phenomenon. (a) Schematic diagram of active center atoms in low spin state. (b) Schematic diagram of active center atoms in high spin state. (c) Schematic diagram of active center atoms completing adsorption process. The relationship between magnetic moment of active center atoms and the distance between the adsorbent (H*, O* and OH*) and slab, based on FeN4 (d), CoN4 (e), NiN4 (f), where the gray arrow represents the trend of magnetic moment variation with height. The relationship between magnetic moment of active center atoms and Q, based on FeN4 (g), CoN4 (h), NiN4 (i). High value of Q represents strong adsorption capability of the active center atom. The gray arrow represents the trend of the adsorption capability indicator Q with respect to magnetic moment.
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