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A non‐precious metal ascorbate fuel cell
Author(s) -
Keramati Abtin,
Hendrix Kimberly,
Nguyen Diana,
Gonzales Fred,
Waters Kimberly,
FryPetit Allyson,
Haan John L.
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6565
Subject(s) - anode , ascorbic acid , open circuit voltage , cathode , catalysis , chemistry , direct ethanol fuel cell , precious metal , power density , metal , inorganic chemistry , electrode , chemical engineering , materials science , organic chemistry , voltage , electrical engineering , power (physics) , physics , food science , quantum mechanics , engineering
Summary The requirement of expensive precious metal catalysts as electrode materials in fuel cells remains a major obstacle to commercialization. In this work, two ascorbate fuel cells are fabricated without precious metal catalysts and are operated at 60°C with an alkaline fuel stream consisting of ascorbate and NaOH. A split pH ascorbate‐peroxide fuel cell utilizing a Cu/C anode and carbon black cathode was fabricated with a Na + conducting cation exchange membrane and operated with H 2 O 2 in H 2 SO 4 as the oxidant. It achieved a maximum power density of 51 mW cm −2 and an open circuit voltage of 1.05 V. This power density is comparable to previous ascorbate and ascorbic acid fuel cells that utilized precious metal catalysts (ie, Pd, Pt). Notably, the performance was achieved with simple Cu and C electrodes. For comparison, an alkaline ascorbate fuel cell was prepared that employed a Cu/C anode and ACTA cathode (FeCo/C) separated by an anion exchange membrane and used oxygen gas as the oxidant. It produced a maximum power density of 6 mW cm −2 and an open circuit voltage of 0.48 V. These ascorbate fuel cells demonstrate the opportunity to replace precious metal catalysts in order to dramatically lower the cost of fuel cell electrodes with comparable performance to counterpart ascorbate fuel cells previously employing precious metal catalysts.