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Effectiveness of phase- and morphology-controlled MnO2 nanomaterials derived from flower-like δ-MnO2 as alternative cathode catalyst in microbial fuel cells.
Dalton Trans. 2019 Apr 16; 48(16):5429-5443.DT

Abstract

Crystal phase and morphology variations obtained by simple high-temperature annealing offer promising strategies for employing nanostructured manganese oxide as a cathode catalyst for microbial fuel cells (MFCs). This study examines the effectiveness of simultaneous-phase and morphology-controlled manganese dioxide nanomaterials, designed by annealing a hydrothermally synthesized flower-like δ-manganese dioxide precursor at 300-800 °C, as cathode catalysts for MFCs. MFCs with the best-performing catalyst cathode (at a reasonable mass loading) were also analyzed through cyclic voltammetry and electrochemical impedance spectroscopy. Among MFCs with non-annealed and annealed manganese dioxide cathodes (0.5 mg cm-2), those with the catalyst annealed at 500 °C (148 ± 7 mW m-2, CE = 13 ± 1%) generated the most power (5-52%). MFCs with the catalyst annealed at 500 °C at a loading of 1 mg cm-2 as the cathode delivered the highest maximum power density (213 ± 9 mW m-2, CE = 13 ± 1%), representing 44% of that obtained using Pt/C at 0.5 mg Pt per cm2 (483 ± 11 mW m-2, CE = 18 ± 2%) and a comparatively low internal resistance (164 ± 2 Ω). Both cyclic voltammetry and electrochemical impedance spectroscopy results were consistent with empirical data. Compared with previously reported cathode materials, the annealed product from the precursor flower-like δ-manganese dioxide annealed at 500 °C (particularly at a loading of 1 mg cm-2) was a more reliable, efficient, and inexpensive sustainable cathode catalyst for scaled-up MFCs.

Authors+Show Affiliations

Water and Wastewater Research Center (WWRC), Water Research Institute (WRI), Shahid Abbaspour Blvd., Tehran, 16765 313, Iran. alirezavalipour.envi@gmail.com.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30951077

Citation

Valipour, Alireza, et al. "Effectiveness of Phase- and Morphology-controlled MnO2 Nanomaterials Derived From Flower-like δ-MnO2 as Alternative Cathode Catalyst in Microbial Fuel Cells." Dalton Transactions (Cambridge, England : 2003), vol. 48, no. 16, 2019, pp. 5429-5443.
Valipour A, Hamnabard N, Meshkati SMH, et al. Effectiveness of phase- and morphology-controlled MnO2 nanomaterials derived from flower-like δ-MnO2 as alternative cathode catalyst in microbial fuel cells. Dalton Trans. 2019;48(16):5429-5443.
Valipour, A., Hamnabard, N., Meshkati, S. M. H., Pakan, M., & Ahn, Y. H. (2019). Effectiveness of phase- and morphology-controlled MnO2 nanomaterials derived from flower-like δ-MnO2 as alternative cathode catalyst in microbial fuel cells. Dalton Transactions (Cambridge, England : 2003), 48(16), 5429-5443. https://doi.org/10.1039/c9dt00520j
Valipour A, et al. Effectiveness of Phase- and Morphology-controlled MnO2 Nanomaterials Derived From Flower-like δ-MnO2 as Alternative Cathode Catalyst in Microbial Fuel Cells. Dalton Trans. 2019 Apr 16;48(16):5429-5443. PubMed PMID: 30951077.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effectiveness of phase- and morphology-controlled MnO2 nanomaterials derived from flower-like δ-MnO2 as alternative cathode catalyst in microbial fuel cells. AU - Valipour,Alireza, AU - Hamnabard,Nazanin, AU - Meshkati,Seyed Mohammad Hadi, AU - Pakan,Mahyar, AU - Ahn,Young-Ho, PY - 2019/4/6/pubmed PY - 2019/7/31/medline PY - 2019/4/6/entrez SP - 5429 EP - 5443 JF - Dalton transactions (Cambridge, England : 2003) JO - Dalton Trans VL - 48 IS - 16 N2 - Crystal phase and morphology variations obtained by simple high-temperature annealing offer promising strategies for employing nanostructured manganese oxide as a cathode catalyst for microbial fuel cells (MFCs). This study examines the effectiveness of simultaneous-phase and morphology-controlled manganese dioxide nanomaterials, designed by annealing a hydrothermally synthesized flower-like δ-manganese dioxide precursor at 300-800 °C, as cathode catalysts for MFCs. MFCs with the best-performing catalyst cathode (at a reasonable mass loading) were also analyzed through cyclic voltammetry and electrochemical impedance spectroscopy. Among MFCs with non-annealed and annealed manganese dioxide cathodes (0.5 mg cm-2), those with the catalyst annealed at 500 °C (148 ± 7 mW m-2, CE = 13 ± 1%) generated the most power (5-52%). MFCs with the catalyst annealed at 500 °C at a loading of 1 mg cm-2 as the cathode delivered the highest maximum power density (213 ± 9 mW m-2, CE = 13 ± 1%), representing 44% of that obtained using Pt/C at 0.5 mg Pt per cm2 (483 ± 11 mW m-2, CE = 18 ± 2%) and a comparatively low internal resistance (164 ± 2 Ω). Both cyclic voltammetry and electrochemical impedance spectroscopy results were consistent with empirical data. Compared with previously reported cathode materials, the annealed product from the precursor flower-like δ-manganese dioxide annealed at 500 °C (particularly at a loading of 1 mg cm-2) was a more reliable, efficient, and inexpensive sustainable cathode catalyst for scaled-up MFCs. SN - 1477-9234 UR - https://www.unboundmedicine.com/medline/citation/30951077/Effectiveness_of_phase__and_morphology_controlled_MnO2_nanomaterials_derived_from_flower_like_δ_MnO2_as_alternative_cathode_catalyst_in_microbial_fuel_cells_ L2 - https://doi.org/10.1039/c9dt00520j DB - PRIME DP - Unbound Medicine ER -