Electrolytic hydrogen production is heavily restricted by high-energy consumption majorly due to the relatively high potential of anodic oxygen evolution reaction (OER). Development of OER-alternative reaction at the anode has been recently proposed as a promising pathway to address the associated issues. In this work, we report a hybrid acid/alkali dual-electrolyte electrolyzer by coupling acidic hydrogen evolution reaction (HER) using commercial Pt/C cathode with alkaline Electrocatalytic glycerol oxidation (GOR) which is implemented by developing a nickel foam (NF) supporting Co3O4 nanosheets anode that shows low overpotential and high selectivity toward GOR for formate production. The hybrid acid/alkali electrolyzer only requires an applied voltage of 0.55 V to achieve the electrolytic current density of 10 mA·cm–2 for glycerol conversion into formate at the anode and H2 production at the cathode with the Faraday efficiency of about 100%. The present work may open a new avenue to maximize the electron utilization efficiency and implement the energy-saving green route for H2 generation.
Self-supporting electrode; Glycerol oxidation; Electrocatalysis; Acid/alkali dual-electrolyte electrolyzer; Hydrogen generation
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Xin Feng, Bo-Wen Liu, Ke-Xin Guo, Lin-Feng Fan, Gen-Xiang Wang, Su-Qin Ci, Zhen-Hai Wen.
Anodic Electrocatalysis of Glycerol Oxidation for Hybrid Alkali/Acid Electrolytic Hydrogen Generation[J]. Journal of Electrochemistry,
Available at: https://jelectrochem.xmu.edu.cn/journal/vol29/iss2/5
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