Pt/MnO 2 nanosheets: facile synthesis and highly efficient catalyst for ethylene oxidation at low temperature

• Published in: RSC advances Vol. 7; no. 24; pp. 14809 - 14815
• Main Authors: Wang, Min, Zhang, Lingxia, Huang, Weimin, Zhou, Yajun, Zhao, Han, Lv, Jian, Tian, Jianjian, Kan, Xiaotian, Shi, Jianlin
• Format: Journal Article
• Language: English
• Published: 2017
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/C6RA26529D

Transition metal oxides (TMOs) have been playing an indispensible role in the catalysis of redox reactions. In particular, two dimensional TMOs expose their surface/edge sites to a large extent, which brings unique catalytic features such as greatly enhanced catalytic activities. Here a series of MnO 2 nanosheets have been facilely synthesized by a simple redox reaction between KMnO 4 and 2-( N -morpholino)ethane sulfonic acid (MES) at room temperature. Among the obtained MnO 2 samples, MnO 2 -48 h showed the highest performance in removing C 2 H 4 resulting from its highest concentration of surface active oxygen species. To further improve the oxidation activity of the catalyst, a small amount of Pt nanoparticles (NPs) was subsequently loaded on MnO 2 nanosheets (Pt/MnO 2 ) by a colloidal deposition method. The Pt/MnO 2 demonstrated enhanced catalytic performance and maintained complete removal of 20 ppm C 2 H 4 at 50 °C for at least 12 h, which can be attributed to the large amount of adsorbed oxygen species and synergetic catalytic effect between Pt and the MnO 2 support.