It would be beneficial to design transition metal-based catalysts having large surface areas and good electron transmission efficiency to replace expensive noble metal-based catalysts. In this work, hollow graphitized carbon spheres loaded with MnO₂ nanosheets were prepared by a simple two step hydrothermal method. The large surface area and excellent conductivity promote the catalytic oxidation of toluene. The optimized catalyst degraded 90% of 500 ppm-toluene at 180 °C and so out-performed some noble metal-based catalysts. The working mechanism and intermediates are also explained in detail. This study demonstrates that the adsorption capacity and conductivity of a carbon-based support prepared by a simple process can promote catalytic performance and is expected to assist in the development of high-performance transition metal oxide catalysts for volatile organic compound remediation.

设计具有大表面积和良好电子传输效率的过渡金属基催化剂以替代昂贵的贵金属基催化剂将是有益的。在这项工作中，载有 MnO _{2 的空心石墨化碳球}通过简单的两步水热法制备纳米片。大的表面积和优异的导电性促进了甲苯的催化氧化。优化后的催化剂在 180 °C 时可降解 90% 的 500 ppm 甲苯，因此性能优于一些贵金属基催化剂。还详细解释了工作机制和中间体。该研究表明，通过简单工艺制备的碳基载体的吸附容量和电导率可以提高催化性能，有望协助开发用于挥发性有机化合物修复的高性能过渡金属氧化物催化剂。