TY  - JOUR
AU  - Li, Tiesheng
AU  - Bi, Sa
AU  - Li, Huanhuan
AU  - Wang, Wei
PY  - 2022
DA  - 2022/12/02
TI  - Fabrication and Catalytic Property of an Ordered Terpyridine Pd(II)/Ni(II) Catalytic Monolayer for Suzuki Coupling Reactions
JO  - Catalysis Research
SP  - 042
VL  - 02
IS  - 04
AB  - Fabrication, arrangement, and controllable composition of ordered organometallic films are critical for designing a highly active catalyst and investigating the catalytic mechanism. In this paper, an organometallic terpyridine Pd(II)/Ni(II) monolayer linked on the silicon substrate surface (denoted as Si-Tpy-Pd1/Ni1) was prepared and characterized using water contact angle, ultraviolet spectra, X-ray diffraction, scanning electron microscopy, and X-ray photoelectron microscopy. Si-Tpy-Pd1/Ni1 exhibited high catalytic activity, substrate applicability, and reusability after 5 runs. During recycling, the deactivation was induced by the aggregation of active Pd/Ni nanoparticles. The catalytic mechanism was heterogeneous and occurred on the Si-Tpy-Pd1/Ni1 monolayer surface; the mechanism was confirmed using hot filtrate, poison test, and a three-phase experiment. The real active center was Pdδ–/Niδ+ and was formed in situ on the organometallic monolayer surface, which acted as a precursor with a synergistic effect between Pd and Ni. The electron density of Pd became more negative because of electron transfer from Ni to Pd, which facilitated the oxidative addition reaction.
SN  - 2771-490X
UR  - https://doi.org/10.21926/cr.2204042
DO  - 10.21926/cr.2204042
ID  - Li2022
ER  -