Chemistry - A European Journal
Chemistry - A European Journal
5 years ago

Protection of Platinum-Based Micromotors from Thiol Toxicity by Using Manganese Oxide

Protection of Platinum-Based Micromotors from Thiol Toxicity by Using Manganese Oxide
Tam Do Minh, Muhammad Safdar, Janne Jänis
Platinum-based micromotors have shown many exciting applications when functionalized using gold–thiol chemistry. However, thiols are known to bind to the Pt surface, which can lead to serious deactivation of the catalyst. In this paper, it is demonstrated that MnO2 can be used to protect Pt-based micromotors prior to the thiol treatment, thus fully avoiding the catalyst poisoning. This approach will greatly facilitate the use of the functionalized Pt micromotors for which the thiol toxicity has been a limiting factor. Keep it moving: A proof-of-concept solution for the protection of Pt-based micromotors against thiol-induced deactivation, which limits their functionalization by gold–thiol chemistry for a variety of applications, is proposed. Thiols are known to bind to the Pt surface, which can lead to serious deactivation of the catalyst. The inner catalytic surface of the electrochemically fabricated Au/Pt micromotors can be covered with MnO2 to completely block the pores prior to thiol treatment, thus protecting the inner Pt surface from thiol chemisorption. This approach will greatly facilitate the use of the functionalized Pt micromotors for which the thiol toxicity has been a limiting factor.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700788

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