Polyaniline/β-MnO2 nanocomposites as cathode electrocatalyst for oxygen reduction reaction in microbial fuel cells.

Abstract:

:An efficient and inexpensive catalyst for oxygen reduction reaction (ORR), polyaniline (PANI) and β-MnO2 nanocomposites (PANI/β-MnO2), was developed for air-cathode microbial fuel cells (MFCs). The PANI/β-MnO2, β-MnO2, PANI and β-MnO2 mixture modified graphite felt electrodes were fabricated as air-cathodes in double-chambered MFCs and their cell performances were compared. At a dosage of 6 mg cm-2, the maximum power densities of MFCs with PANI/β-MnO2, β-MnO2, PANI and β-MnO2 mixture cathodes reached 248, 183 and 204 mW m-2, respectively, while the cathode resistances were 38.4, 45.5 and 42.3 Ω, respectively, according to impedance analysis. Weak interaction existed between the rod-like β-MnO2 and surficial growth granular PANI, this together with the larger specific surface area and PANI electric conducting nature enhanced the electrochemical activity for ORR and improved the power generation. The PANI/β-MnO2 nanocomposites are a promising cathode catalyst for practical application of MFCs.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Zhou X,Xu Y,Mei X,Du N,Jv R,Hu Z,Chen S

doi

10.1016/j.chemosphere.2018.01.058

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

482-491

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(18)30066-3

journal_volume

198

pub_type

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