DataVXACS Applied Materials & InterfacesPaper
journal article·2016-07-13

Electrochemically Scavenging the Silica Impurities at the Ni–YSZ Triple Phase Boundary of Solid Oxide Cells

Youkun Tao, Jing Shao, Shiyang Cheng

ACS Applied Materials & Interfaces· Volume 8· Issue 27
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Source abstract

Abstract

Silica impurity originated from the sealing or raw materials of the solid oxide cells (SOCs) accumulating at the Ni-YSZ triple phase boundaries (TPBs) is known as one major reason for electrode passivation. Here we report nanosilica precipitates inside Ni grains instead of blocking the TPBs when operating the SOCs at |i| ≥ 1.5 A cm(-2) for electrolysis of H2O/CO2. An electrochemical scavenging mechanism was proposed to explain this unique behavior: the removal of silica proceeded through the reduction of the silica to Si under strong cathodic polarization, followed by bulk diffusion of Si into Ni and reoxidation of Si in the Ni grain.
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Research context

Nanomaterials

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanical and Aerospace Engineering, West Virginia University, 395 Evansdale Drive, Morgantown, West Virginia 26505, United States

College of Chemistry and Environmental Engineering, Shenzhen University, 3688 Nanhai Avenue, Nanshan District, Shenzhen, P.R. China

Department of Energy Conversion and storage, Technical University of Denmark, DTU Risø Campus, Frederiksborgvej 399, Roskilde DK-4000, Denmark

Department of Chemistry, University of Oslo, Sem Sælands vei 26, 0371 Oslo, Norway

References (30)

Show source-provided references
1. 10.1038/nmat104010.1038/nmat1040 ↗
2. 10.1016/S1369-7021(11)70279-610.1016/S1369-7021(11)70279-6 ↗
3. 10.1146/annurev.matsci.33.022802.09271310.1146/annurev.matsci.33.022802.092713 ↗
4. 10.1021/cr500086510.1021/cr5000865 ↗
5. 10.1002/aenm.20140100310.1002/aenm.201401003 ↗
6. 10.1016/j.ijhydene.2009.10.04510.1016/j.ijhydene.2009.10.045 ↗
7. 10.1038/3510462010.1038/35104620 ↗
8. 10.1016/j.jpowsour.2013.03.00110.1016/j.jpowsour.2013.03.001 ↗
9. 10.1038/ncomms504510.1038/ncomms5045 ↗
10. 10.1126/science.117640410.1126/science.1176404 ↗
11. 10.1038/nmat416610.1038/nmat4166 ↗
12. 10.1149/1.273386110.1149/1.2733861 ↗
13. 10.1016/0167-2738(91)90225-Z10.1016/0167-2738(91)90225-Z ↗
14. 10.1016/S0167-2738(03)00147-410.1016/S0167-2738(03)00147-4 ↗
15. 10.1016/S0167-2738(02)00269-210.1016/S0167-2738(02)00269-2 ↗
16. 10.1016/S0167-2738(01)00969-910.1016/S0167-2738(01)00969-9 ↗
17. 10.1149/1.346480410.1149/1.3464804 ↗
18. 10.1149/2.079403jes10.1149/2.079403jes ↗
19. 10.1002/cctc.20130094110.1002/cctc.201300941 ↗
20. 10.1146/annurev.matsci.33.022802.09325810.1146/annurev.matsci.33.022802.093258 ↗
21. 10.1023/A:102055160923010.1023/A:1020551609230 ↗
22. 10.1039/C5FD00032G10.1039/C5FD00032G ↗
23. 10.1149/1.324456810.1149/1.3244568 ↗
24. 10.1063/1.9980210.1063/1.99802 ↗
25. 10.1063/1.33203410.1063/1.332034 ↗
26. 10.1007/BF0264622010.1007/BF02646220 ↗
27. 10.1007/BF0066672510.1007/BF00666725 ↗
28. 10.1149/1.356972710.1149/1.3569727 ↗
29. 10.1038/nchem.177310.1038/nchem.1773 ↗
30. 10.1016/j.ssi.2015.11.00710.1016/j.ssi.2015.11.007 ↗