Nanoceria samples were prepared by
three different procedures reported elsewhere28 (link) with some modifications. The samples were denoted according to the
procedure used as CeAMM, CePER, and CeUREA. Briefly, the CeAMM sample
was prepared by precipitation of cerium(III) nitrate aqueous solution
with an ammonia solution followed by aging for 4 h at 60 °C in
CO2-free ambient air without any calcination. The CePER
sample was prepared by precipitating an aqueous cerium(III) nitrate
solution with sodium hydroxide solution followed by treatment with
hydrogen peroxide and refluxing at 100 °C for 24 h without any
calcination. The CeUREA sample was synthesized by homogeneous precipitation
of aqueous cerium(III) nitrate solution with urea at 90 °C and
subsequent calcination at 500 °C/2 h. All prepared samples were
dried (or calcined) in atmospheric air and stored in vials under ambient
air. See details in theSupporting Information (SI).
three different procedures reported elsewhere28 (link) with some modifications. The samples were denoted according to the
procedure used as CeAMM, CePER, and CeUREA. Briefly, the CeAMM sample
was prepared by precipitation of cerium(III) nitrate aqueous solution
with an ammonia solution followed by aging for 4 h at 60 °C in
CO2-free ambient air without any calcination. The CePER
sample was prepared by precipitating an aqueous cerium(III) nitrate
solution with sodium hydroxide solution followed by treatment with
hydrogen peroxide and refluxing at 100 °C for 24 h without any
calcination. The CeUREA sample was synthesized by homogeneous precipitation
of aqueous cerium(III) nitrate solution with urea at 90 °C and
subsequent calcination at 500 °C/2 h. All prepared samples were
dried (or calcined) in atmospheric air and stored in vials under ambient
air. See details in the
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