[Angew. Chem. Int. Ed.] Prof. Jianfeng LI's group published a paper entitled “Probing Interfacial Electronic and Catalytic Properties on Well‐Defined Surfaces by Using In Situ Raman Spectroscopy”-College of Chemistry and Chemical Engineering

[Angew. Chem. Int. Ed.] Prof. Jianfeng LI's group published a paper entitled “Probing Interfacial Electronic and Catalytic Properties on Well‐Defined Surfaces by Using In Situ Raman Spectroscopy”

Publish Date:10.August 2018 Visted: Times

Title: Probing Interfacial Electronic and Catalytic Properties on Well‐Defined Surfaces by Using In Situ Raman Spectroscopy

Author: Ya‐Hao Wang, Miao‐Miao Liang, Yue‐Jiao Zhang, Shu Chen, Petar Radjenovic, Dr. Hua Zhang, Prof. Zhi‐Lin Yang, Prof. Xiao‐Shun Zhou, Prof. Zhong‐Qun Tian, Prof. Jian‐Feng Li

Summary:

Heterogeneous metal interfaces play a key role in determining the mechanism and performance of catalysts. However, in situ characterization of such interfaces at the molecular level is challenging. Herein, two model interfaces, Pd and Pt overlayers on Au single crystals, were constructed. The electronic structures of these interfaces as well as effects of crystallographic orientation on them were analyzed by shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS) using phenyl isocyanide (PIC) as a probe molecule. A clear red shift in the frequency of the C≡N stretch (ν_NC) was observed, which is consistent with X‐ray photoelectron spectroscopy (XPS) data and indicates that the ultrathin Pt and Pd layers donate their free electrons to the Au substrates. Furthermore, in situ electrochemical SHINERS studies showed that the electronic effects weaken Pt−C/Pd−C bonds, leading to improved surface activity towards CO electrooxidation.

Full Link：https://doi.org/10.1002/anie.201805464

Research Highlights

[Angew. Chem. Int. Ed.] Prof. Jianfeng LI's group published a paper entitled “Probing Interfacial Electronic and Catalytic Properties on Well‐Defined Surfaces by Using In Situ Raman Spectroscopy”