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Research Papers

Doping Effect of Alkaline Earth Metal on Oxygen Reduction Reaction in Praseodymium Nickelate With Layered Perovskite Structure

[+] Author and Article Information
Lai Wei

Key Laboratory of Functional
Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: 791415049@qq.com

Li-Ping Sun

Key Laboratory of Functional
Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: lipingsun98@yahoo.com

Qiang Li

Key Laboratory of Functional
Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: lq1211@sina.com

Li-Hua Huo

Key Laboratory of Functional
Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: lhhuo68@yahoo.com

Hui Zhao

Key Laboratory of Functional
Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: zhaohui98@yahoo.com

1Corresponding author.

Manuscript received June 10, 2016; final manuscript received January 9, 2017; published online February 1, 2017. Assoc. Editor: San Ping Jiang.

J. Electrochem. En. Conv. Stor. 13(4), 041003 (Feb 01, 2017) (7 pages) Paper No: JEECS-16-1076; doi: 10.1115/1.4035731 History: Received June 10, 2016; Revised January 09, 2017

Pr1.9A0.1NiO4 (A = Ca, Sr, Ba) are synthesized and characterized by X-ray powder diffraction (XRD), infrared spectrum (IR), and X-ray photoelectron spectroscopy (XPS). The effects of alkaline earth doping on the covalence of Pr–O and Ni–O bond, the mean valence of Ni, and the hydroxide absorption ability of material surface are studied. It is found that the covalence of Pr–O and Ni–O bond increases with the decrease of alkaline earth element radius. Meanwhile, the mean valence of Ni and the surface hydroxide absorption ability are enhanced. The electrochemical measurement results indicate that the O22 /OH replacement reaction is facilitated by the increase of mean valence of Ni in the material. The best oxygen reduction reaction (ORR) activity is found in Pr1.9Ca0.1NiO4. The current density of 2.16 mA cm−2 is obtained at a potential of −0.6 V (versus Hg/HgO). The tafel slope is 66.48 mV decade−1, close to Pt/C material.

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References

Figures

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Fig. 1

XRD patterns of as prepared P2NO, PC1NO, PS1NO, and PB1NO

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Fig. 2

IR spectra of P2NO, PC1NO, PS1NO, and PB1NO

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Fig. 3

Ni 2p2/3 XPS spectra of P2NO, PC1NO, PS1NO, and PB1NO

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Fig. 4

O 1s XPS spectra of Pr1.9A0.1NiO4 (A = Ca, Sr, Ba) and Pr2NiO4

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Fig. 5

Nyquist plot measured at −0.25 V with varying rotation rates (a) and at varying bias voltage with 1000 rpm (b). The balls and red lines show experimental and fitted data, respectively, (c) Nyquist plot of Pr1.9A0.1NiO4 at −0.25 V and 1000 rpm.

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Fig. 6

(a) CV curve of P2NO, PC1NO, PS1NO, and PB1NO with a scanning rate of 20 mV s−1, (b) ORR polarization curves of P2NO, PC1NO, PS1NO, and PB1NO under 1600 rpm, (c) Tafel slope based on ORR polarization curves, (d) chronopotentiometic of Pr1.9Ca0.1NiO4 kept at 50 μA cm−2 for 600 min

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