期刊
BIOSENSORS & BIOELECTRONICS
卷 80, 期 -, 页码 118-122出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2016.01.008
关键词
Nickel foam; Graphene; Cathode; Hydrogen recovery
类别
资金
- National Science Foundation for Distinguished Young Scholars [51225802]
- National Natural Science Foundation of China (NSFC) [51578534]
- Hundred Talents Program of the Chinese Academy of Sciences
- Chinese Academy of Sciences [YSW2013B06, 135]
- Sino-EU International S&T cooperation program [S2015GR1012]
In comparison to precious metal catalyst especially Platinum (Pt), nickel foam (NF) owned cheap cost and unique three-dimensional (3D) structure, however, it was scarcely applied as cathode material in microbial electrolysis cell (MEC) as the intrinsic laggard electrochemical activity for hydrogen recovery. In this study, a self-assembly 3D nickel foam-graphene (NF-G) cathode was fabricated by facile hydro thermal approach for hydrogen evolution in MECs. Electrochemical analysis (linear scan voltammetry and electrochemical impedance spectroscopy) revealed the improved electrochemical activity and effective mass diffusion after coating with graphene. NF-G as cathode in MEC showed a significant enhancement in hydrogen production rate compared with nickel foam at a variety of biases. Noticeably, NF-G showed a comparable averaged hydrogen production rate (1.31 +/- 0.07 mL H-2 mL(-1) reactor d(-1)) to Platinum/carbon (Pt/C) (1.32 +/- 0.07 mL H-2 mL(-1) reactor d(-1)) at 0.8 V. Profitable energy recovery could be achieved by NF-G cathode at higher applied voltage, which performed the best hydrogen yield of 3.27 +/- 0.16 mol H-2 mol(-1) acetate at 0.8 V and highest energy efficiency of 185.92 +/- 6.48% at 0.6 V. (C) 2016 Elsevier B.V. All rights reserved.
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