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<p>Hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) is not only a key eco-friendly oxidizer but also a promising energy carrier with an energy density comparable to that of compressed hydrogen. The industrial production of H<sub>2</sub>O<sub>2</sub> relies on the energy-intensive and environmentally detrimental anthraquinone process, necessitating the exploration of greener alternatives. Here we demonstrate sustainable and unassisted electrochemical H<sub>2</sub>O<sub>2</sub> production (via the two-electron oxygen reduction reaction) coupled to the oxidative valorization of glycerol, a biomass energy by-product, operating without external electric or solar energy inputs. We applied bismuth-loaded Pt and oxidized carbon nanotube electrocatalysts, for glycerol oxidation reaction and two-electron oxygen reduction reaction, respectively, which possess onset potentials close to the theoretical values for the electrochemical reactions. With this system, we achieved a high H<sub>2</sub>O<sub>2</sub> production rate of approximately 8.475 μmol cm<sup>−2</sup> min<sup>−1</sup> and high glycerate selectivity for in situ glycerol oxidation reaction (74%), while producing renewable electricity on-site.</p><p></p>

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Unassisted electrochemical H2O2 production coupled to glycerol oxidation

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • Dongrak Oh,
  • Seon Woo Hwang,
  • Dong Yeon Kim,
  • Jesse E. Matthews,
  • Jinyoung Lee,
  • Jaime E. Avilés Acosta,
  • Sang-Won Lee,
  • Yi Xu,
  • Ara Cho,
  • Dong Un Lee,
  • Thomas F. Jaramillo,
  • Dong-Hwa Seo,
  • Ji-Wook Jang

摘要

Hydrogen peroxide (H2O2) is not only a key eco-friendly oxidizer but also a promising energy carrier with an energy density comparable to that of compressed hydrogen. The industrial production of H2O2 relies on the energy-intensive and environmentally detrimental anthraquinone process, necessitating the exploration of greener alternatives. Here we demonstrate sustainable and unassisted electrochemical H2O2 production (via the two-electron oxygen reduction reaction) coupled to the oxidative valorization of glycerol, a biomass energy by-product, operating without external electric or solar energy inputs. We applied bismuth-loaded Pt and oxidized carbon nanotube electrocatalysts, for glycerol oxidation reaction and two-electron oxygen reduction reaction, respectively, which possess onset potentials close to the theoretical values for the electrochemical reactions. With this system, we achieved a high H2O2 production rate of approximately 8.475 μmol cm−2 min−1 and high glycerate selectivity for in situ glycerol oxidation reaction (74%), while producing renewable electricity on-site.