期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 11, 页码 6583-6591出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.01.001
关键词
Hydrogen; Electrodeposition; Microbial electrolysis; Ni-Co-S; Overpotential
资金
- National Natural Science Foundation of China, China [51578534]
- Youth Innovation Promotion Association CAS, China [2017062]
High overpotential and soaring prices of the cathode electrode are the bottlenecks for the development of microbial electrolysis technology for hydrogen production. In this study, a novel one-step electrodeposition method has been attempted to fabricate electrodeposited cathodes in situ growth of Ni-Co-S, Ni-S, Co-S catalyst on nickel foam (NF) to reduce the overpotential of electrodes. Finally, a uniform nanosheet with a high specific surface area and more active sites is formed on the NF surface, resulting in a lower overpotential than plain NF. At 0.8 V, the Co-S/NF cathode produces a favorable 42% increase in hydrogen yield (0.68 m(3).m(-3).d(-1)), 40% upsurge in current density (10.6 mA/cm(3)) and 39% rise of cathodic recovery rate (58.0 +/- 3.2%) than bare NF, followed by Ni-Co-S/NF and Ni-S/NF cathode. All the electrodeposited electrodes demonstrate enhanced current density and reduced electron losses, thereby achieving efficient hydrogen production. These innovative varieties of electrodes are highly advantageous as they are relatively inexpensive and easy to manufacture with great potential in reducing costs and further real time application in large scale. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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