Cu-Ce0.8Sm0.2O2-δ anode for electrochemical oxidation of methanol in solid oxide fuel cell: Improved activity by La and Nd doping

Yongxin Zhang, Zhiyong Huang, Tian Gan, Nianjun Hou, Lijun Fan, Xin Zhou, Ge Gao, Jingyu Li, Yicheng Zhao*, Yongdan Li

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Cu–Ce0.8La0.1Sm0.1O2-δ and Cu–Ce0.8Nd0.1Sm0.1O2-δ are studied as anode materials for solid oxide fuel cells with methanol as fuel. The oxygen surface exchange and bulk diffusion coefficients of Ce0.8Sm0.2O2-δ both increase with La and Nd doping. The CH3OH temperature-programmed surface reaction results show that the addition of La and Nd accelerates the chemical oxidation of CH3OH. Furthermore, compared with Cu–Ce0.8Sm0.2O2-δ, the anodes with La and Nd show higher resistance to coking in CH3OH atmosphere. The Cu-based cermet anode exhibits a low catalytic activity for the electrochemical oxidation of H2, and a single cell supported by a Ce0.8Sm0.2O2-δ‑carbonate composite electrolyte with Cu–Ce0.8Sm0.2O2-δ anode exhibits a maximum power density of 160 mW cm−2 at 650 °C using dry hydrogen as fuel. However, the maximum power density reaches 550 mW cm−2 when CH3OH is used as fuel, and further increases to 730 and 830 mW cm−2 with the addition of La and Nd in the anode, respectively. The results indicate that with the promotion of the oxygen activity, the Cu-based cermet is a promising anode material for solid oxide fuel cells using CH3OH as fuel.

Original languageEnglish
Article number115728
Number of pages7
JournalSolid State Ionics
Volume369
Early online date12 Aug 2021
DOIs
Publication statusPublished - 15 Oct 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Anode
  • Doped ceria
  • Methanol fuel
  • Oxygen activity
  • Solid oxide fuel cell

Fingerprint

Dive into the research topics of 'Cu-Ce0.8Sm0.2O2-δ anode for electrochemical oxidation of methanol in solid oxide fuel cell: Improved activity by La and Nd doping'. Together they form a unique fingerprint.

Cite this