Co-Precipitation Synthesis and Characterization of Strontium Lanthanum Vanadate Nanoparticles

Huynh Thanh-Nam; Hayk Hacob Nersisyan; Soon-Jik Hong; Jong-Hyeon Lee

doi:10.3740/MRSK.2021.31.4.209

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2021 Vol.31, Issue 4 Preview Page Next Page

Co-Precipitation Synthesis and Characterization of Strontium Lanthanum Vanadate Nanoparticles

April 2021. pp. 209-218

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Abstract

Strontium lanthanum vanadate La_1-xSr_xVO₃ (LSVO) is a promising anode material for electrochemical devices, especially for solid oxide fuel cells, thanks to its irregular electrical conductivity. However, the known synthesis methods are incapable of producing well-dispersed LSVO nanoparticles (NPs) with homogeneous size distribution, which partly impedes the applicability of the material. Thus, a new approach to synthesize LSVO NPs with such characteristics is of paramount importance. In the present work, we successfully prepare LSVO NPs with a high dispersion degree and homogeneous size distribution via a modified co-precipitation pathway, followed by hydrogen reduction at a temperature as low as 700 °C. The prepared LSVO NPs display uniform sizes in the range of 50 ~ 100 nm and do not contain any secondary phases, according to XRD analysis. The chemical mechanism of reactions that occur to form the LSVO is thoroughly highlighted. The work functions of NPs measured by the UPS analysis are in the 2.13 ~ 3.62 eV range, making the LSVO powders promising for use in thermionic devices. An explanation of the role of Sr substitution in work function values of LSVO is also proposed.

Keywords

strontium lanthanum vanadate

co-precipitation

perovskite

well-dispersed nanoparticle

work function

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 31
No :4
Pages :209-218
Received Date : 2021-03-11
Revised Date : 2021-03-23
Accepted Date : 2021-03-24
DOI :https://doi.org/10.3740/MRSK.2021.31.4.209

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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