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首页> 外文期刊>RSC Advances >A graphene modified biocathode for enhancing hydrogen production
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A graphene modified biocathode for enhancing hydrogen production

机译：石墨烯修饰的生物阴极，可提高产氢量

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摘要

Biocathodes have shown great promise for developing low-cost cathodes for hydrogen production in microbial electrolysis cells (MEC). To promote the performance of hydrogen production with a biocathode, we constructed a graphene modified biocathode and assessed the performance of the modified biocathode by setting different cathode potentials. The results indicated that it was feasible to promote the current density, electron recovery efficiency (ERE) and hydrogen production rate by a modified biocathode using graphene. At -1.1 V (vs. Ag/AgCl), the hydrogen production rate of the graphene modified biocathode even achieved 2.49 +/- 0.23 m(3) per m(3) per day with 89.12 +/- 6.03% of ERE at a current density of 14.07 +/- 0.06 A m(-2), which were about 2.83 times, 1.38 times and 2.06 times that of the unmodified biocathode, respectively. The hydrogen production performance of the graphene modified biocathode was close to that of the platinum catalyzed cathode and superior to that of the stainless steel mesh cathode at -1.1 V.
机译：生物阴极在开发低成本阴极以显示微生物电解池（MEC）中的氢气生产方面显示出巨大的希望。为了提高生物阴极的制氢性能，我们构建了石墨烯修饰的生物阴极，并通过设置不同的阴极电势评估了修饰的生物阴极的性能。结果表明，采用石墨烯改性的生物阴极提高电流密度，电子回收效率（ERE）和产氢率是可行的。在-1.1 V（vs. Ag / AgCl）下，石墨烯改性生物阴极的产氢率甚至达到了每天每m（3）2.49 +/- 0.23 m（3）和89.12 +/- 6.03％的ERE。电流密度为14.07 +/- 0.06 A m（-2），分别是未修饰生物阴极的2.83倍，1.38倍和2.06倍。在-1.1 V下，石墨烯修饰的生物阴极的制氢性能接近铂催化的阴极，并且优于不锈钢网状阴极。

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