Electrochemical performance and stability of nano-structured Co/PdO-co-impregnated Y2O3 stabilized ZrO2 cathode for intermediate temperature solid oxide fuel cells

Fengli Liang; Jaka Sunarso; Junkui Mao; Wei Zhou

doi:10.1016/j.ijhydene.2016.11.159

Electrochemical performance and stability of nano-structured Co/PdO-co-impregnated Y₂O₃ stabilized ZrO₂ cathode for intermediate temperature solid oxide fuel cells

Fengli Liang, Jaka Sunarso, Junkui Mao, Wei Zhou

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Palladium (Pd) is an attractive cathode catalyst component for solid oxide fuel cells (SOFCs) that has high tendency to agglomerate during operation at around 800 °C. This work shows that such agglomeration can be inhibited by alloying Co into Pd. PdO, Pd_0.95Co_0.05O, Pd_0.90Co_0.10O, and Pd_0.80Co_0.20O were synthesized and characterized. Powder X-ray diffraction patterns at 750 and 900 °C confirmed that PdO decomposition to Pd which normally occurred at 840 °C was suppressed for Co containing Pd alloys while thermal gravimetric analyses indicated improved redox reversibility of PdO ↔ Pd conversion for alloys during the thermal cycling between 600 and 900 °C. Scanning electron microscopy images supported these arguments. Pd_0.90Co_0.10+yttria stabilized zirconia (YSZ) electrode (i.e., 10 mol % Co containing PdO-impregnated YSZ electrode) displayed the highest oxygen reduction reaction (ORR) performance and stability. The polarization resistance for ORR on Pd_0.90Co_0.10+YSZ cathode is only 0.088 Ω cm² at 750 °C. During polarization test at 750 °C, Pd_0.90Co_0.10+YSZ cathode showed stable performance for 30 h while the performance of Pd+YSZ cathode degraded after 10 h.

Original language	English
Pages (from-to)	6978-6987
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	42
Issue number	10
DOIs	https://doi.org/10.1016/j.ijhydene.2016.11.159
State	Published - 9 Mar 2017

Keywords

Cathode
Electrochemical performance
Nano-structured electrode
PdO alloys
Solid oxide fuel cells
Thermal stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2016.11.159

Cite this

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title = "Electrochemical performance and stability of nano-structured Co/PdO-co-impregnated Y2O3 stabilized ZrO2 cathode for intermediate temperature solid oxide fuel cells",

abstract = "Palladium (Pd) is an attractive cathode catalyst component for solid oxide fuel cells (SOFCs) that has high tendency to agglomerate during operation at around 800 °C. This work shows that such agglomeration can be inhibited by alloying Co into Pd. PdO, Pd0.95Co0.05O, Pd0.90Co0.10O, and Pd0.80Co0.20O were synthesized and characterized. Powder X-ray diffraction patterns at 750 and 900 °C confirmed that PdO decomposition to Pd which normally occurred at 840 °C was suppressed for Co containing Pd alloys while thermal gravimetric analyses indicated improved redox reversibility of PdO ↔ Pd conversion for alloys during the thermal cycling between 600 and 900 °C. Scanning electron microscopy images supported these arguments. Pd0.90Co0.10+yttria stabilized zirconia (YSZ) electrode (i.e., 10 mol % Co containing PdO-impregnated YSZ electrode) displayed the highest oxygen reduction reaction (ORR) performance and stability. The polarization resistance for ORR on Pd0.90Co0.10+YSZ cathode is only 0.088 Ω cm2 at 750 °C. During polarization test at 750 °C, Pd0.90Co0.10+YSZ cathode showed stable performance for 30 h while the performance of Pd+YSZ cathode degraded after 10 h.",

keywords = "Cathode, Electrochemical performance, Nano-structured electrode, PdO alloys, Solid oxide fuel cells, Thermal stability",

author = "Fengli Liang and Jaka Sunarso and Junkui Mao and Wei Zhou",

note = "Publisher Copyright: {\textcopyright} 2016 Hydrogen Energy Publications LLC",

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Electrochemical performance and stability of nano-structured Co/PdO-co-impregnated Y₂O₃ stabilized ZrO₂ cathode for intermediate temperature solid oxide fuel cells. / Liang, Fengli; Sunarso, Jaka; Mao, Junkui et al.
In: International Journal of Hydrogen Energy, Vol. 42, No. 10, 09.03.2017, p. 6978-6987.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Electrochemical performance and stability of nano-structured Co/PdO-co-impregnated Y2O3 stabilized ZrO2 cathode for intermediate temperature solid oxide fuel cells

AU - Liang, Fengli

AU - Sunarso, Jaka

AU - Mao, Junkui

AU - Zhou, Wei

PY - 2017/3/9

Y1 - 2017/3/9

N2 - Palladium (Pd) is an attractive cathode catalyst component for solid oxide fuel cells (SOFCs) that has high tendency to agglomerate during operation at around 800 °C. This work shows that such agglomeration can be inhibited by alloying Co into Pd. PdO, Pd0.95Co0.05O, Pd0.90Co0.10O, and Pd0.80Co0.20O were synthesized and characterized. Powder X-ray diffraction patterns at 750 and 900 °C confirmed that PdO decomposition to Pd which normally occurred at 840 °C was suppressed for Co containing Pd alloys while thermal gravimetric analyses indicated improved redox reversibility of PdO ↔ Pd conversion for alloys during the thermal cycling between 600 and 900 °C. Scanning electron microscopy images supported these arguments. Pd0.90Co0.10+yttria stabilized zirconia (YSZ) electrode (i.e., 10 mol % Co containing PdO-impregnated YSZ electrode) displayed the highest oxygen reduction reaction (ORR) performance and stability. The polarization resistance for ORR on Pd0.90Co0.10+YSZ cathode is only 0.088 Ω cm2 at 750 °C. During polarization test at 750 °C, Pd0.90Co0.10+YSZ cathode showed stable performance for 30 h while the performance of Pd+YSZ cathode degraded after 10 h.

AB - Palladium (Pd) is an attractive cathode catalyst component for solid oxide fuel cells (SOFCs) that has high tendency to agglomerate during operation at around 800 °C. This work shows that such agglomeration can be inhibited by alloying Co into Pd. PdO, Pd0.95Co0.05O, Pd0.90Co0.10O, and Pd0.80Co0.20O were synthesized and characterized. Powder X-ray diffraction patterns at 750 and 900 °C confirmed that PdO decomposition to Pd which normally occurred at 840 °C was suppressed for Co containing Pd alloys while thermal gravimetric analyses indicated improved redox reversibility of PdO ↔ Pd conversion for alloys during the thermal cycling between 600 and 900 °C. Scanning electron microscopy images supported these arguments. Pd0.90Co0.10+yttria stabilized zirconia (YSZ) electrode (i.e., 10 mol % Co containing PdO-impregnated YSZ electrode) displayed the highest oxygen reduction reaction (ORR) performance and stability. The polarization resistance for ORR on Pd0.90Co0.10+YSZ cathode is only 0.088 Ω cm2 at 750 °C. During polarization test at 750 °C, Pd0.90Co0.10+YSZ cathode showed stable performance for 30 h while the performance of Pd+YSZ cathode degraded after 10 h.

KW - Cathode

KW - Electrochemical performance

KW - Nano-structured electrode

KW - PdO alloys

KW - Solid oxide fuel cells

KW - Thermal stability

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JF - International Journal of Hydrogen Energy

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