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The synergistic effect of Pt in different electronic states induces Sn-modified Pt/KY catalyst with high aromatization ability in n-octane reforming.

The weakened catalytic role of the zeolite channels might be a considerable reason for the low superiority of Pt/KL catalysts in n-octane aromatization.

H-Beta zeolites were employed for hexose decarburization to furfural. Excellent performance was achieved over high-Si H-Beta zeolite due to its high B/(B + L) ratio. The synergetic mechanism between *BEA channel and framework-Al is decisive.

The lower the minimum surface electrostatic potential of the ligand, the better the modification effect on Ru-based catalysts. The modification effect of HMTA and DABCO on Ru-based catalysts is greatly improved when they are prepared into organic chlorine salts.

The intrinsic principle of the electronic property of Pt catalysts for the selective hydrogenation of 1,3-butadiene was systemically elucidated.

To explore the role of substituents on ligands in the modification of metal catalysts, a series of Ru–amide/AC catalysts are synthesized with various amide ligands derived from formamide and assessed for acetylene hydrochlorination. Activity evaluation reveals a rule that replacing a hydrogen on formamide with an electron donor substituent can enhance the catalytic performance, while electron withdrawing substituents have the opposite effect. However, formanilide, which violates this law, shows the best modification effect, which is proved to be the effect of steric hindrance by characterization and DFT calculation. Therefore, another rule is concluded that the electron donor ability and steric hindrance of substituents on amide ligands jointly affect the modification effect. Finally, benzanilide, with a superior modification effect, which searched based on the above results, gives strong evidence for the correction of these rules. This work provides a theoretical basis for the search for efficient ligands for acetylene hydrochlorination.

Cobalt is an important catalyst for Fischer–Tropsch synthesis, and it can form cobalt carbide under syngas (CO + H2) reaction conditions, especially in CO-rich mixtures. As cobalt carbide has been credited as a promoter which brings about significant selectivity changes in CO hydrogenation, we are interested in studying it using a surface science approach, to understand its interaction with important reaction intermediates. In the present study, we use a NiAl(110) surface to produce a flat alumina film and prepare cobalt and cobalt carbide thereon. We find that cobalt is thermally stable up to 800 K on alumina/NiAl(110). Different preparation temperatures result in different morphologies of the surface. Cobalt carbide is obtained by evaporating cobalt in an C2H4 environment, as proved by the appearance of a C 1s peak at 283.3 eV of carbidic carbon and at 286.2 eV of chemisorbed CO on cobalt carbide in the XPS spectra. Large cobalt carbide crystals with a typical size of 100 nm × 50 nm are revealed by STM. The results show that cobalt and cobalt carbide on alumina/NiAl(110) can serve as suitable model systems for studying structures, adsorption and catalytic properties.