Surface- and Tip-Enhanced Raman Spectroscopy in Catalysis

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• 作者：Thomas Hartman ; Caterina S. Wondergem ; Naresh Kumar ; Albert van den Berg ; Bert M. Weckhuysen
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2016
• 出版时间：April 21, 2016
• 年：2016
• 卷：7
• 期：8
• 页码：1570-1584
• 全文大小：861K
• 年卷期：0
• ISSN：1948-7185

文摘

Surface- and tip-enhanced Raman spectroscopy (SERS and TERS) techniques exhibit highly localized chemical sensitivity, making them ideal for studying chemical reactions, including processes at catalytic surfaces. Catalyst structures, adsorbates, and reaction intermediates can be observed in low quantities at hot spots where electromagnetic fields are the strongest, providing ample opportunities to elucidate reaction mechanisms. Moreover, under ideal measurement conditions, it can even be used to trigger chemical reactions. However, factors such as substrate instability and insufficient signal enhancement still limit the applicability of SERS and TERS in the field of catalysis. By the use of sophisticated colloidal synthesis methods and advanced techniques, such as shell-isolated nanoparticle-enhanced Raman spectroscopy, these challenges could be overcome.