The decisive factor of hollow spherical network morphology of Nd1-xCexCo1-yCuyO3±δ perovskites towards soot oxidation

• DOI: 10.1007/s11696-022-02122-2
• Publication Date: 2022-02-25T01:02:24Z
• Authors: Hari Prasad Uppara; Sunit Kumar Singh; Nitin Kumar Labhs...; Mudiyaru Subrahma...; Harshini Dasari
• Keywords: Orthorhombic crystal system; Crystal (programming language)

Abstract The perovskites Nd 1-x Ce x Co 1-y Cu y O 3 ( = 0–0.05, 0–0.1) have been synthesized using PVP-assisted sol–gel method and applied for soot oxidation reactions. XRD technique reveals the formation of orthorhombic phase with crystal volume around ~ 214 Å size 25–40 nm. interconnected nanoparticles hollow spherical network morphology particles are observed samples NdCoO (NC1) 0.98 0.02 0.95 0.05 (NC2) particle sizes 300–500 experienced a charge transfer from ligand (O 2− ) to cobalt cation in UV region (210–260 nm) also broad absorption bands visible (380–600 nm). In addition, bandgap energy NC2 showed lowest value (4.21 eV); as well surface morphological advantage promoted transport surface-chemisorbed oxygen species inner outer catalysts due reducibility catalyst $$\left( {\frac{{{\text{O}}_{2}^{{{\text{x}} - }} }}{{{\text{O}}_{2}^{{{\text{x}} + {\text{O}}^{2 } 0.90} \right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:mrow> <mml:mfrac> <mml:msubsup> <mml:mtext>O</mml:mtext> <mml:mn>2</mml:mn> </mml:mrow> <mml:mtext>x</mml:mtext> <mml:mo>-</mml:mo> </mml:msubsup> <mml:mo>+</mml:mo> <mml:msup> </mml:msup> </mml:mfrac> <mml:mo>=</mml:mo> <mml:mn>0.90</mml:mn> </mml:mfenced> </mml:math> . Furthermore, XPS results evidenced higher content 2+ upon substitution Ce/Cu into NC1, which successively formed more amount β -oxygen species. Remarkably, perovskite temperature T 50% 434 °C) among investigated perovskites. Besides, spherically networked NC2/NC1 decided process.