Investigating the role of metals loaded on nitrogen-doped carbon-nanotube electrodes in electroenzymatic alcohol dehydrogenation

Sanath Kondaveeti, Gi Dae Park, Ramasamy Shanmugam, Raviteja Pagolu, Sanjay K.S. Patel, Aarti Bisht, Dong Rip Kim, Yun Chan Kang, Jung Kul Lee

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A new enzymatic biofuel cell (EBFC) is developed using conductive metal alloy nanoparticles with carbon cloth (CC) as an immobilization support for ethanol dehydrogenase (EtDH) and formolase (FLS). Ethanol (EtOH) dehydrogenation to acetaldehyde via direct electron transfer (DET) is pursued as the first step, followed by the condensation of acetaldehyde to acetoin. Metals are deposited onto novel three-dimensional jellyfish (JF)-shaped nanoparticles (SiO2–NCNT–CoFe2), where NCNT denotes “N-doped carbon nanotube”. The fabricated JF–metal–CC–EtDH bioelectrodes exhibit a variation in power generation with varying metals, with a value 37.6-fold higher than that of previously reported EBFC operations with DET for EtOH oxidation. The highest acetoin content is also found in JF-Os–CC–EtDH–FLS, attributable to faster electron uptake by the bioelectrode. First-principles calculations suggest that the d-state delocalization of metal-loaded JF particles is the cause of the enhanced catalytic activity, and it can be utilized in designing electrocatalysts.

Original languageEnglish
Article number121195
JournalApplied Catalysis B: Environmental
Volume307
DOIs
Publication statusPublished - 2022 Jun 15

Keywords

  • Acetoin
  • Carboligation
  • Enzyme fuel cell
  • First-principle analysis
  • Metal alloy nanoparticle

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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