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Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
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Acidic enol electrooxidation-coupled hydrogen production with ampere-level current density
Zheng-Jie Chen1, Jiuyi Dong1, Jiajing Wu2
1Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
Nature Communications
|July 14, 2023
Summary
This study presents an efficient acidic hydrogen production system using ascorbic acid electrooxidation and iron single-atom catalysts. This method achieves high current densities and low energy consumption, paving the way for industrial-scale sustainable hydrogen generation from biomass.
Area of Science:
- Sustainable energy
- Electrochemistry
- Catalysis
Background:
- Biomass upgrading coupled with hydrogen production is crucial for sustainable energy.
- Current biomass electrooxidation methods face challenges with high voltage and low current density, limiting industrial application.
Purpose of the Study:
- To develop an efficient acidic hydrogen production system using biomass upgrading.
- To overcome the limitations of conventional biomass electrooxidation reactions.
Main Methods:
- Anodic electrooxidation of ascorbic acid coupled with cathodic hydrogen evolution in an acidic medium.
- Utilization of Fe single-atom catalysts for enhanced reaction kinetics.
- Fabrication of a two-electrode membrane-free electrolyzer.
Main Results:
- Achieved an ultralow overpotential of 12 mV at 10 mA/cm² with Fe single-atom catalysts.
- Reached a current density of 1 A/cm² at 0.75 V with ~100% Faraday efficiency for hydrogen production.
- Demonstrated an industrial current density of 2 A/cm² at 1.1 V with reduced energy consumption (2.63 kWh/Nm³ H₂).
Conclusions:
- The developed system offers a novel and efficient pathway for industrial-scale hydrogen production from biomass.
- The use of ascorbic acid and Fe single-atom catalysts significantly improves hydrogen generation efficiency and reduces energy requirements compared to water electrolysis.
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