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New Insight into the Doped Strontium Titanate Cathode with In Situ Exsolved Nickel Nanoparticles for Electrolysis of Carbon Dioxide
Author(s) -
Bai Lu,
Li Haibin,
Yan Zhen,
Hao Xiaohan,
Ke Minghui,
Xie Kui,
Li Baoguang
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202001598
Subject(s) - materials science , cathode , electrolysis , nickel , chemical engineering , strontium titanate , nanoparticle , carbon fibers , strontium , analytical chemistry (journal) , inorganic chemistry , nanotechnology , thin film , metallurgy , composite material , electrode , chemistry , electrolyte , environmental chemistry , physics , nuclear physics , engineering , composite number
One way to avoid CO 2 pollution is changing it into CO by solid oxide electrolyzers, in which doped SrTiO 3 can be used as cathode materials. It is found that in situ exsolved Ni nanoparticles in doped SrTiO 3 cathode can further improve the electrolysis performance. In this work, (La 0.2 Sr 0.8 ) 0.85 Ti 0.8 Cr 0.1 Ni 0.1 O 3− δ cathode with in situ exsolved Ni particles is investigated. A new model proposed explains the influence of exsolution process on crystal structure. Based on thermogravimetric analysis, it is estimated that about 13.6% to 37.4% Ni atoms exsolve out of original cathode. With the new cathode containing Ni nanoparticles, the yield of CO from electrolysis is improved at about 50% and the current efficiency is increased at about 10%.