Controlling Multiple Active Sites on Pd-CeO2 for Sequential C-C Cross-coupling and Alcohol Oxidation in One Reaction System

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Ko, Wonjae; Kim, Ju Hee; Yim, Guk Hee; Lee, Seong Chan; Kim, Sumin; Kwak, Minjoon; Choi, Hyunwoo; Kim, Jongchan; Antink, Wytse Hooch; Kim, Jiheon; Lee, Chan Woo; Bok, Jinsol; Jung, Yoon; Lee, Eunwon; Lee, Kug-Seung; Cho, Sung-Pyo; Kim, Do Heui; Kim, Young Gyu; Lee, Byoung-Hoon; Hyeon, Taeghwan; Yoo, Dongwon

Issue Date
Wiley - VCH Verlag GmbH & CO. KGaA
ChemCatChem, Vol.14 No.4, p. e202101760
Ceria (CeO2)-supported metal catalysts have been widely utilized for various single-step chemical transformations. However, using such catalysts for a multistep organic reaction in one reaction system has rarely been achieved. Here, we investigate multiple active sites on Pd-CeO2 catalysts and optimize them for a multistep reaction of C-C cross-coupling and alcohol oxidation. Atomic-level imaging and spectroscopic studies reveal that metallic Pd-0 and Pd-CeO2 interface are active sites on Pd-CeO2 for C-C cross-coupling and oxidation, respectively. These active sites are controlled under the structural evolution of Pd-CeO2 during reductive heat-treatments. Accordingly, we found that optimally reduced Pd-CeO2 catalysts containing similar to 1.5 nm-sized Pd nanoclusters with both sites in balance are ideal for multistep chemical transformations in one reaction system. Our strategy to design supported metal catalysts leads to one-pot sequential synthetic protocols for pharmaceutical building blocks.
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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