Investigation of Perovskite Oxide SrCo 0.8Cu 0.1Nb 0.1O 3–δ as a Cathode Material for Room Temperature Direct Ammonia Fuel Cells

Peimiao Zhou, Shigang Zhen, Rong Lan, Shanwen Tao

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Abstract

Single-phase perovskite oxide SrCo 0.8Cu 0.1Nb 0.1O 3–δ was synthesized using a Pechini method. X-ray diffraction (XRD) analysis indicated a cubic structure with a=3.8806(7) Å. The oxide material was combined with active carbon, forming a composite electrode to be used as the cathode in a room temperature ammonia fuel cell based on an anion membrane electrolyte and NiCu/C anode. An open circuit voltage (OCV) of 0.19 V was observed with dilute 0.02 m (340 ppm) ammonia solution as the fuel. The power density and OCV were improved upon the addition of 1 m NaOH to the fuel, suggesting that the addition of NaOH, which could be achieved through the introduction of alkaline waste to the fuel stream, could improve performance when wastewater is used as the fuel. It was found that the SrCo 0.8Cu 0.1Nb 0.1O 3−δ cathode was converted from irregular shape into shuttle-shape during the fuel cell measurements. As the key catalysts for electrode materials for this fuel cell are all inexpensive, after further development, this could be a promising technology for removal of ammonia from wastewater.

Original languageEnglish
Pages (from-to)2788-2794
Number of pages7
JournalChemSusChem
Volume12
Issue number12
Early online date12 Apr 2019
DOIs
Publication statusPublished - 21 Jun 2019

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Bibliographical note

© 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Keywords

  • alkaline
  • cathode
  • direct ammonia fuel cell
  • non-precious metal catalyst
  • perovskite oxide

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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