ZnO-promoted surface diffusion on NiO-Ce                         
                        0.8
                                                 Sm                         
                        0.2
                                                 O                         
                        1.9
                                                  anode for solid oxide fuel cell

Xiaojing Zhi; Tian Gan; Nianjun Hou; Lijun Fan; Tongtong Yao; Jun Wang; Yicheng Zhao; Yongdan Li

doi:10.1016/j.jpowsour.2019.03.088

ZnO-promoted surface diffusion on NiO-Ce _0.8 Sm _0.2 O _1.9 anode for solid oxide fuel cell

Xiaojing Zhi
, Tian Gan
, Nianjun Hou
, Lijun Fan
, Tongtong Yao
, Jun Wang
, Yicheng Zhao^*
, Yongdan Li

^*Corresponding author for this work

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

34 Citations (Scopus)

142 Downloads (Pure)

Abstract

Ni _1-x Zn _x O-Ce _0.8 Sm _0.2 O _1.9 is studied as an anode material for solid oxide fuel cells with hydrogen and methanol as fuels. After reduction, Zn is incorporated into the lattice of Ni when x is less than 0.5, while NiZn alloy accompanied with ZnO is formed when x reaches 0.8. The electrochemical oxidation process of H ₂ on the anode is investigated with a symmetric cell under various H ₂ partial pressures. The addition of Zn increases the electron cloud density of Ni and thus weakens the adsorbing strength of H on Ni, accelerating the surface diffusion of H species, which is the rate determining step when the content of Zn is lower than 0.5. ZnO in the reduced Ni _0·2 Zn _0·8 O- Ce _0.8 Sm _0.2 O _1.9 anode facilitates H spillover, resulting in the variation of the rate determining step and the highest activity of the anode. The cell with Ni _0·2 Zn _0·8 O- Ce _0.8 Sm _0.2 O _1.9 anode shows the highest performance with both H ₂ and methanol fuels at 700 °C. ZnO also improves coking resistance of NiO-Ce _0.8 Sm _0.2 O _1.9 anode.

Original language	English
Pages (from-to)	290-296
Number of pages	7
Journal	Journal of Power Sources
Volume	423
DOIs	https://doi.org/10.1016/j.jpowsour.2019.03.088
Publication status	Published - 31 May 2019
MoE publication type	A1 Journal article-refereed

Funding

The financial support of NSF of China under contract number 51402210 and the support of Tianjin Municipal Science and Technology Commission under contract number 15JCQNJC06500 are gratefully acknowledged. The work has been also supported by the Program of Introducing Talents to the University Disciplines under file number B06006 , and the Program for Changjiang Scholars and Innovative Research Teams in Universities under file number IRT 0641 . Appendix A

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Anode
Methanol fuel
Solid oxide fuel cell
Surface diffusion
ZnO

Access to Document

10.1016/j.jpowsour.2019.03.088

CHEM_Zhi_et_al_ZnO-promoted_surface_diffusion_2019_Journal_of_Power_SourcesAccepted author manuscript, 705 KBLicence: CC BY-NC-ND

Cite this

Zhi, X., Gan, T., Hou, N., Fan, L., Yao, T., Wang, J., Zhao, Y., & Li, Y. (2019). ZnO-promoted surface diffusion on NiO-Ce _0.8 Sm _0.2 O _1.9 anode for solid oxide fuel cell. Journal of Power Sources, 423, 290-296. https://doi.org/10.1016/j.jpowsour.2019.03.088

Zhi, Xiaojing ; Gan, Tian ; Hou, Nianjun et al. / ZnO-promoted surface diffusion on NiO-Ce _0.8 Sm _0.2 O _1.9 anode for solid oxide fuel cell. In: Journal of Power Sources. 2019 ; Vol. 423. pp. 290-296.

@article{d170bb5bfd4343148019c0c60ed22839,

title = "ZnO-promoted surface diffusion on NiO-Ce 0.8 Sm 0.2 O 1.9 anode for solid oxide fuel cell",

abstract = " Ni 1-x Zn x O-Ce 0.8 Sm 0.2 O 1.9 is studied as an anode material for solid oxide fuel cells with hydrogen and methanol as fuels. After reduction, Zn is incorporated into the lattice of Ni when x is less than 0.5, while NiZn alloy accompanied with ZnO is formed when x reaches 0.8. The electrochemical oxidation process of H 2 on the anode is investigated with a symmetric cell under various H 2 partial pressures. The addition of Zn increases the electron cloud density of Ni and thus weakens the adsorbing strength of H on Ni, accelerating the surface diffusion of H species, which is the rate determining step when the content of Zn is lower than 0.5. ZnO in the reduced Ni 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 anode facilitates H spillover, resulting in the variation of the rate determining step and the highest activity of the anode. The cell with Ni 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 anode shows the highest performance with both H 2 and methanol fuels at 700 °C. ZnO also improves coking resistance of NiO-Ce 0.8 Sm 0.2 O 1.9 anode. ",

keywords = "Anode, Methanol fuel, Solid oxide fuel cell, Surface diffusion, ZnO",

author = "Xiaojing Zhi and Tian Gan and Nianjun Hou and Lijun Fan and Tongtong Yao and Jun Wang and Yicheng Zhao and Yongdan Li",

year = "2019",

month = may,

day = "31",

doi = "10.1016/j.jpowsour.2019.03.088",

language = "English",

volume = "423",

pages = "290--296",

journal = "Journal of Power Sources",

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Zhi, X, Gan, T, Hou, N, Fan, L, Yao, T, Wang, J, Zhao, Y & Li, Y 2019, 'ZnO-promoted surface diffusion on NiO-Ce _0.8 Sm _0.2 O _1.9 anode for solid oxide fuel cell', Journal of Power Sources, vol. 423, pp. 290-296. https://doi.org/10.1016/j.jpowsour.2019.03.088

ZnO-promoted surface diffusion on NiO-Ce _0.8 Sm _0.2 O _1.9 anode for solid oxide fuel cell. / Zhi, Xiaojing; Gan, Tian; Hou, Nianjun et al.
In: Journal of Power Sources, Vol. 423, 31.05.2019, p. 290-296.

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

TY - JOUR

T1 - ZnO-promoted surface diffusion on NiO-Ce 0.8 Sm 0.2 O 1.9 anode for solid oxide fuel cell

AU - Zhi, Xiaojing

AU - Gan, Tian

AU - Hou, Nianjun

AU - Fan, Lijun

AU - Yao, Tongtong

AU - Wang, Jun

AU - Zhao, Yicheng

AU - Li, Yongdan

PY - 2019/5/31

Y1 - 2019/5/31

N2 - Ni 1-x Zn x O-Ce 0.8 Sm 0.2 O 1.9 2 2 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 2 0.8 Sm 0.2 O 1.9 is studied as an anode material for solid oxide fuel cells with hydrogen and methanol as fuels. After reduction, Zn is incorporated into the lattice of Ni when x is less than 0.5, while NiZn alloy accompanied with ZnO is formed when x reaches 0.8. The electrochemical oxidation process of H on the anode is investigated with a symmetric cell under various H partial pressures. The addition of Zn increases the electron cloud density of Ni and thus weakens the adsorbing strength of H on Ni, accelerating the surface diffusion of H species, which is the rate determining step when the content of Zn is lower than 0.5. ZnO in the reduced Ni anode facilitates H spillover, resulting in the variation of the rate determining step and the highest activity of the anode. The cell with Ni anode shows the highest performance with both H and methanol fuels at 700 °C. ZnO also improves coking resistance of NiO-Ce anode.

AB - Ni 1-x Zn x O-Ce 0.8 Sm 0.2 O 1.9 is studied as an anode material for solid oxide fuel cells with hydrogen and methanol as fuels. After reduction, Zn is incorporated into the lattice of Ni when x is less than 0.5, while NiZn alloy accompanied with ZnO is formed when x reaches 0.8. The electrochemical oxidation process of H 2 on the anode is investigated with a symmetric cell under various H 2 partial pressures. The addition of Zn increases the electron cloud density of Ni and thus weakens the adsorbing strength of H on Ni, accelerating the surface diffusion of H species, which is the rate determining step when the content of Zn is lower than 0.5. ZnO in the reduced Ni 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 anode facilitates H spillover, resulting in the variation of the rate determining step and the highest activity of the anode. The cell with Ni 0·2 Zn 0·8 O- Ce 0.8 Sm 0.2 O 1.9 anode shows the highest performance with both H 2 and methanol fuels at 700 °C. ZnO also improves coking resistance of NiO-Ce 0.8 Sm 0.2 O 1.9 anode.

KW - Anode

KW - Methanol fuel

KW - Solid oxide fuel cell

KW - Surface diffusion

KW - ZnO

UR - https://www.scopus.com/pages/publications/85063354497

U2 - 10.1016/j.jpowsour.2019.03.088

DO - 10.1016/j.jpowsour.2019.03.088

M3 - Article

AN - SCOPUS:85063354497

SN - 0378-7753

VL - 423

SP - 290

EP - 296

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Zhi X, Gan T, Hou N, Fan L, Yao T, Wang J et al. ZnO-promoted surface diffusion on NiO-Ce _0.8 Sm _0.2 O _1.9 anode for solid oxide fuel cell. Journal of Power Sources. 2019 May 31;423:290-296. doi: 10.1016/j.jpowsour.2019.03.088