Bismuth-impregnated ruthenium with activated carbon as photocathode catalyst to proliferate the efficacy of a microbial fuel cell

Gourav Dhar Bhowmick, Sovik Das, Koushik Adhikary, Makarand Madhao Ghangrekar, Arunabha Mitra

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Ruthenium (Ru) was impregnated with bismuth (Bi) to reduce the spectrum demand for the excitation of Ru to employ it as photocathode catalyst (Bi-Ru) in a microbial fuel cell (MFC) to ameliorate its power output in the presence of visible spectrum. The coulombic efficiency (CE) and power density of an MFC with Bi-Ru (MFC-BiRu) were 26.7 ± 0.8% and 10.0 ± 0.5 W/m3, respectively, which were two and six times higher than the control MFC that was operated without any cathode catalyst. Moreover, the CE and power density of the MFC-BiRu was 12.5% and 22% higher than the MFC that was operated with platinum (MFC-Pt) as the cathode catalyst (24.0 ± 0.7% and 8.2 ± 0.4 W/m3, respectively). Furthermore, the chemical oxygen demand (COD) removal efficiency and net energy recovery (NER) of MFC-BiRu were 91.8 ± 1.5% and 722 W-h/m3, which was almost 10% and 1.8 times higher than the MFC-Pt, respectively. Therefore, the results illustrated that Bi-Ru could be a plausible alternative to replace Pt as a cathode catalyst; therefore, rendering the field-scale application of MFC.

Original languageEnglish
Article number04020066
JournalJournal of Hazardous, Toxic, and Radioactive Waste
Volume25
Issue number1
DOIs
StatePublished - 1 Jan 2021
Externally publishedYes

Keywords

  • Bioenergy
  • Microbial fuel cell
  • Net energy recovery
  • Photocathode catalyst
  • Wastewater treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • General Chemical Engineering
  • Water Science and Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal

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