Mechanochemical Synthesis of Platinum Nanoclusters Supported Cordierite for Enhanced Catalytic Oxidation of Toluene

Peng Du,1,2

Chaoliang Lin,1

Ruyue Wang,1,2

Xian He,1

Ru Zhang,2

Zhaofeng He,3,*Email

Geng Chang,4

Xuchao Pan,4,*Email

Kai Huang1,*Email

Ming Lei1,*Email

1State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

2Beijing Key Laboratory of Space-ground Interconnection and Convergence, Beijing University of Posts and Telecommunications (BUPT), Xitucheng Road NO.10, Beijing, 100876, China

3School of Artificial Intelligence, Beijing University of Posts and Telecommunications, Beijing 100876, China.

4Ministerial Key Laboratory of ZNDY, Nanjing University of Science &Technology, Nanjing 210094, China

Abstract

Developing a low cost and high efficiency synthetic pathway is essential for the large-scale application of supported noble metal catalysts in many important environmental catalytic reactions, especially for VOCs catalytic oxidation. In this study, we report a facile chemical wet ball-milling method to control the metal-support interactions and Pt nanoclusters (1.12 ± 0.23 nm) supported cordierite honeycomb ceramic (CHC) catalysts with enhanced toluene oxidation performance is obtained. The optimized Pt/CHC catalyst with Pt loading as low as 1.0 wt.% could convert 90% toluene (1000 ppm) to CO2 at about 160 °C under a space velocity of 40000 mL g−1 h−1. The catalyst also exhibits a low apparent activation energy of 44.1 kJ mol-1, high stability for more than 60 h and moisture resistance properties under reaction condition. It is concluded that the high adsorbed oxygen species concentration, better low-temperature reducibility, and synergistic effect between Pt nanoclusters and CHC support is responsible for enhanced catalytic performance. Furthermore, the present wet ball-milling synthetic strategy paves a new avenue for mass production of highly efficient supported noble metal catalysts for environmental applications.

Mechanochemical Synthesis of Platinum Nanoclusters Supported Cordierite for Enhanced Catalytic Oxidation of Toluene