It is urgent to develop low-cost but efficient oxygen reduction reaction (ORR) catalysts for the emerging clean energy devices of fuel cells based on proton exchange membrane. Herein, we report a facile method to covert the biomass of black fungus into an efficient ORR catalyst. The black fungus undergoes hydrothermal and pyrolysis processes to transform into carbon-based materials. The as-obtained BF-N-950 catalyst shows prominent ORR catalytic activities in both acidic and alkaline electrolytes with a half-wave potential reaching 0.77 and 0.91 V, respectively. A membrane electrolyte assembly was fabricated with the as-obtained BF-N-950 as the cathode catalyst which shows a high peak power density of 255 mW cm^-2. The study shows the potential of converting conventional biomass into low-cost ORR catalyst, which is promising for the fuel cell technology.

迫切需要开发低成本，高效的氧还原反应（ORR）催化剂，以用于基于质子交换膜的燃料电池新兴清洁能源装置。在本文中，我们报道了一种简便的方法将黑木耳的生物量转化为有效的ORR催化剂。黑木耳经过水热和热解过程，转变为碳基材料。如此获得的BF-N-950催化剂在酸性和碱性电解质中均显示出显着的ORR催化活性，其半波电势分别达到0.77和0.91V。使用获得的BF-N-950作为阴极催化剂制造了膜电解质组件，该组件显示出255 mW cm ^-2的高峰值功率密度。这项研究表明了将传统生物质转化为低成本ORR催化剂的潜力，这对于燃料电池技术是有前途的。