Hydrogen production from macroalgae by simultaneous dark fermentation and microbial electrolysis cell with surface-modified stainless steel mesh cathode. (16th November 2021)

• Record Type: Journal Article
• Authors: Yun, Woo Hyun; Yoon, Young Soo; Yoon, Hyon Hee; Nguyen, Phan Khanh Thinh; Hur, Jaehyun
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 79(2021)
• Page Start: 39136
• Page End: 39145
• Publication Date: 2021-11-16
• Subjects: Anodization -- Stainless steel mesh -- Hydrogen -- Macroalgae -- Microbial electrolysis cell; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.09.168
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: An affordable cathode material for microbial electrolysis cells (MECs) was synthesized via surface-modification of stainless steel mesh (SSM) by anodization. The anodization parameters, such as wire mesh size, temperature, applied voltage, operating time, were optimized. The surface-modified SSM (smSSM) exhibited porous surface and higher specific surface area. The as synthesized smSSMs were utilized as freestanding cathodes in a conventional microbial electrolysis cell (MEC) and a simultaneous dark fermentation and MEC process (sDFMEC). The H2 production in MEC and sDFMEC with smSSM as cathode was approximately 150% higher than that with SSM. The performance of smSSM was 67–75% of that of Pt/C. The sDFMEC with smSSM as cathode was stable for 12 cycles of fed-batch operation in 60 days. Overall, energy conversion from S. japonica by sDFMEC was as high as 23.4%. Graphical abstract: Image 1 Highlights: Anodized stainless steel mesh (smSSM) as efficient cathode material for MECs. The anodization conditions were optimized to be 25 °C, 5 min, and 20 V. The smSSM improved H2 production by 150% in an MEC compared to SSM. H2 production from S. japonica in sDFMEC with smSSM was stable for 60 d. H2 yield from S. japonica was as high as 408 mL/g-TS.