首页|Regulating Oxygen Vacancy Defects in Heterogeneous NiO-CeO2-δ Hollow Multi-shelled Structure for Boosting Oxygen Evolution Reaction
Regulating Oxygen Vacancy Defects in Heterogeneous NiO-CeO2-δ Hollow Multi-shelled Structure for Boosting Oxygen Evolution Reaction
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CeO2 with excellent oxygen storage-exchange capacity and NiO with excellent surface activity were used to construct a heterogeneous NiO-CeO2-δ hollow multi-shelled structure(HoMS)by spray drying.It turned out that as the proportion of CeO2 increases,the overpotential and Tafel slope of NiO-CeO2-δ HoMSs first decreased and then increased.This is mainly because the construction of the NiO-CeO2-δ HoMSs not only increases the specific surface area,but also introduces oxygen vacancy defects,thus improving the interface charge transfer capability of the materials and further improving the oxygen evolution reaction(OER)performance.However,the increase of the calcination temperature will induce the decay of the OER performance of NiO-CeO2-δ HoMSs,which is mainly due to the decrease of the specific surface area,the reduction of oxygen vacancy defects,and the weakening of interface charge transfer capability.Furthermore,a series of heterogeneous composite HoMSs,such as Ni/Co,Mo/Ni,Al/Ni and Fe/Ni oxides was successfully constructed by spray drying,which enriched the diversity of HoMSs.
WANG Huan、GONG Guannan、SUN Guohua、QI Jian、YU Ranbo、WANG Dan
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Hebei Key Laboratory of Flexible Functionals Materials,School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050000,P.R.China
State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,P.R.China
Department of Physical Chemistry,School of Metallurgical and Ecological Engineering,University of Science & Technology Beijing,Beijing 100083,P.R.China
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