In‐situ SHINERS Study of the Size and Composition Effect of Pt‐based Nanocatalysts in Catalytic Hydrogenation

• Published in: ChemCatChem Vol. 12; no. 1; pp. 75 - 79
• Main Authors: Wang, Chen, Chen, Xing, Chen, Tian‐Ming, Wei, Jie, Qin, S.‐N., Zheng, Ju‐Fang, Zhang, Hua, Tian, Zhong‐Qun, Li, Jian‐Feng
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 08.01.2020
• Subjects: Bimetals; Catalysts; Catalytic activity; catalytic hydrogenation; Composition effects; Copper; Hydrogenation; in-situ study; Nanoparticles; Nickel; Pinholes; Platinum; platinum-based nanocatalysts; Raman spectroscopy; SHINERS; size and composition effect
• ISSN: 1867-3880; 1867-3899
• DOI: 10.1002/cctc.201901747

Understanding the structure‐activity relationship of catalytic reactions at a molecular level still remains a great challenge. Herein, shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS) is employed to in‐situ study the catalytic hydrogenation of para‐nitrothiophenol (pNTP) on Pt‐based nanocatalysts with different size and composition. The nanocatalysts are assembled on pinhole‐free shell‐isolate nanoparticles (SHINs), which work as Raman amplifiers to enhance the Raman signals of species on the catalysts, allowing the in‐situ monitoring of catalytic reactions carried out on the catalysts. Using this strategy, we find that the catalytic activity of the Pt nanocatalysts shows a volcanic trend with the Pt size, and that PtM (M=Ni or Cu) bimetallic nanocatalysts display much higher performance compared with Pt due to better activation of the nitro group. This work demonstrates that SHINERS is a promising technique for in‐situ study of nanocatalysis thus can deepen the understanding of the behaviors of different catalysts. Shine like a diamond! Shell‐isolated nanoparticles enhanced Raman spectroscopy (SHINERS) has been employed to reveal the size and composition effect of Pt‐based nanocatalysts towards the hydrogenation of pNTP.