Three-dimensional hierarchical metal oxide-carbon electrode materials for highly efficient microbial electrosynthesis
By Cui, M.; Nie, H.; Zhang, T.; Lovley, D.; Russell, T. P.
Published in Sustainable Energy Fuels
2017
Abstract
The production of hierarchical hybrid conductive materials that are mesoporous, with pores spanning from sub-microns to microns in size, is important for large-area electrode applications. Here, a simple one-step, low-cost method to fabricate metal oxide-carbon hybrid materials with a hierarchical pore structure in a microwave oven is demonstrated. The microwave pyrolysis of ferrocene using carbon felt as a microwave absorber is a method that is rapid (takes of seconds), requires neither harsh conditions nor the use of costly equipment, and can be readily scaled up. The produced material has a high specific surface area, a multi-length scale porous structure and a high conductivity, and is quite stable, making it promising for many practical applications. As an electrode in microbial electrosynthesis, its performance is improved by a factor of five and an optimal biofilm of the microorganism is formed on the surface.
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