We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Increasing the Distance of Adjacent Palladium Atoms for Configuration Matching in Selective Hydrogenation.
- Authors
Ge, Xiaohu; Cao, Yueqiang; Yan, Kelin; Li, Yurou; Zhou, Lihui; Dai, Sheng; Zhang, Jing; Gong, Xueqing; Qian, Gang; Zhou, Xinggui; Yuan, Weikang; Duan, Xuezhi
- Abstract
Precisely tailoring the distance between adjacent metal sites to match adsorption configurations of key species for the targeted reaction pathway is a great challenge in heterogeneous catalysis. Here, we report a proof‐of‐concept study on the atomically sites‐tailored pathway in Pd‐catalyzed acetylene hydrogenation, i.e. increasing the distance of adjacent Pd atoms (dPd‐a‐Pd) for configuration matching in acetylene semi‐hydrogenation against coupling. dPd‐a‐Pd is identified as a structural descriptor for describing the competitiveness for reaction pathways, and the increased dPd‐a‐Pd prefers the semi‐hydrogenation pathway due to simultaneously promoted C2H4 desorption and the destabilized transition state of the C2H3* coupling. Spectroscopic, kinetics and electronic structure studies reveal that increasing dPd‐a‐Pd to 3.31 Å delivers superior selectivity and stability due to energy matching and appropriate hybridization of Pd 4d with In 2s and, especially, 2p orbitals.
- Subjects
PALLADIUM; ORBITAL hybridization; ATOMS; HETEROGENEOUS catalysis; ELECTRONIC structure; CATALYTIC hydrogenation; PALLADIUM catalysts; HYDROGENATION
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 51, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202215225