TY - JOUR
T1 - Synthesis of tungstate oxide/bismuth tungstate composite and application in microbial fuel cell as superior low-cost cathode catalyst than platinum
AU - Das, Indrasis
AU - Noori, Md T.
AU - Bhowmick, G. D.
AU - Ghangrekar, M. M.
N1 - Funding Information:
This work is financially supported by Department of Science and Technology, Govt. of India (D.O. No. DST/TSG/NTS/2015/99).
Publisher Copyright:
© 2018 The Electrochemical Society.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Low cost tungsten oxide/bismuth tungstate (WO3/Bi2WO6) composite was synthesized and used as cathode catalyst in microbial fuel cell (MFC). Almost 1.5 times increment in specific surface area of WO3/Bi2WO6 composite was observed as compared with WO3 and WO3/Bi2WO6 exhibited efficient oxygen reduction reaction (ORR) having a current peak of 8.1 mA at – 12.6 mV during cyclic voltammetry analysis, demonstrating less ORR overpotential. The MFC using WO3/Bi2WO6 catalysed cathode could recover a power density (PD) of 145 ± 4.5 mW/m2 and coulombic efficiency (CE) of 28.3 ± 1.5%, followed by 35 ± 5.8 mW/m2 and 17.5 ± 2.4%, respectively, for MFC with WO3 catalyzed cathode and 10.4 ± 3.2 mW/m2 and 10.3 ± 0.9%, respectively, for MFC without any cathode catalyst. Moreover, the PD and CE of 138 ± 6.8 mW/m2 and 27.5 ± 2.0%, respectively, obtained from MFC using Pt/C cathode catalyst, was slightly lower than the MFC with WO3/Bi2WO6 catalyst on cathode. The specific power recovery per unit cost of cathode fabrication of 23.8 mW/$ obtained from MFC with WO3/Bi2WO6 catalyzed cathode is higher than the MFC with Pt/C (12.2 mW/$), making it low cost alternative for scaling-up of MFCs.
AB - Low cost tungsten oxide/bismuth tungstate (WO3/Bi2WO6) composite was synthesized and used as cathode catalyst in microbial fuel cell (MFC). Almost 1.5 times increment in specific surface area of WO3/Bi2WO6 composite was observed as compared with WO3 and WO3/Bi2WO6 exhibited efficient oxygen reduction reaction (ORR) having a current peak of 8.1 mA at – 12.6 mV during cyclic voltammetry analysis, demonstrating less ORR overpotential. The MFC using WO3/Bi2WO6 catalysed cathode could recover a power density (PD) of 145 ± 4.5 mW/m2 and coulombic efficiency (CE) of 28.3 ± 1.5%, followed by 35 ± 5.8 mW/m2 and 17.5 ± 2.4%, respectively, for MFC with WO3 catalyzed cathode and 10.4 ± 3.2 mW/m2 and 10.3 ± 0.9%, respectively, for MFC without any cathode catalyst. Moreover, the PD and CE of 138 ± 6.8 mW/m2 and 27.5 ± 2.0%, respectively, obtained from MFC using Pt/C cathode catalyst, was slightly lower than the MFC with WO3/Bi2WO6 catalyst on cathode. The specific power recovery per unit cost of cathode fabrication of 23.8 mW/$ obtained from MFC with WO3/Bi2WO6 catalyzed cathode is higher than the MFC with Pt/C (12.2 mW/$), making it low cost alternative for scaling-up of MFCs.
UR - http://www.scopus.com/inward/record.url?scp=85067623170&partnerID=8YFLogxK
U2 - 10.1149/2.0781813jes
DO - 10.1149/2.0781813jes
M3 - Article
AN - SCOPUS:85067623170
SN - 0013-4651
VL - 165
SP - G146-G153
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 13
ER -