A rechargeable hydrogen battery based on Ru catalysis

  • Hsu S
  • Rommel S
  • Eversfield P
 et al. 
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Apart from energy generation, the storage and liberation of energy are among the major problems in establishing a sustainable energy supply chain. Herein we report the development of a rechargeable H2 battery which is based on the principle of the Ru-catalyzed hydrogenation of CO2 to formic acid (charging process) and the Ru-catalyzed decomposition of formic acid to CO2 and H2 (discharging process). Both processes are driven by the same catalyst at elevated temperature either under pressure (charging process) or pressure-free conditions (discharging process). Up to five charging-discharging cycles were performed without decrease of storage capacity. The resulting CO2/H2 mixture is free of CO and can be employed directly in fuel-cell technology.

Author-supplied keywords

  • Ru catalysis
  • batteries
  • carbon dioxide
  • energy
  • hydrogenation

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  • Werner R. ThielTechnische Universität Kaiserslautern

  • Shih Fan Hsu

  • Susanne Rommel

  • Philipp Eversfield

  • Keven Muller

  • Elias Klemm

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