In order to couple merits of two dimension and porous materials, by using unique solvent free method, the mesoporous layered α-MnO₂ structured by 2 nm nanosheet was successfully synthesized, which possesses ultra-high surface area (339 m² g⁻¹), meso pore size of 6 nm and large amount of oxygen vacancies. When serving as a cathodic oxygen reduction reaction catalyst in microbial fuel cell, it exhibits superior electrocatalytic performance comparable to the commercial Pt/C and achieves the maximum power density of 1671 ± 26 mW m⁻² with a exchange current density of 21.18 A cm⁻². Meanwhile, density functional theory study reveals that the obviously shrinking of forbidden band and the pseudo band gap between two sharp peak of d DOS, which results in an excellent electrical conductivity, efficient electron transport and low overpotential of electrode. Therefore, it can be expected that the as-prepared MnO₂ catalyst, with extraordinary electrocatalytic performance through a combination of the ultrathin nanosheet architecture and oxygen vacancies, is promising and produces high power density in microbial fuel cell.

以二维和多孔材料，耦合优点通过使用独特的无溶剂的方法，所述介孔层状α-MnO的₂由2纳米结构纳米片成功地合成，其具有超高表面积（339米² 克^-1） ，介孔孔径为6 nm，并且有大量的氧空位。当用作微生物燃料电池中的阴极氧还原反应催化剂时，它表现出可与商用Pt / C相媲美的优异电催化性能，并以16.18 A cm-的交换电流密度实现最大功率密度1671±26 mW m ^{-2 。 2个}。同时，密度泛函理论研究表明，d DOS的两个尖峰之间的禁带明显缩小，且伪带隙明显减小，这导致了优异的导电性，有效的电子传输和电极的低电势。因此，可以预期的是，通过结合超薄纳米片结构和氧空位而具有非凡的电催化性能的制得的MnO ₂催化剂在微生物燃料电池中很有前途并产生高功率密度。