Pure and Ni2O3-decorated CeO2 nanoparticles applied as CO gas sensor: Experimental and theoretical insights

被引：16

作者：

Ciola Amoresi, Rafael Aparecido ^{[1
,2
]}

de Oliveira, Regiane Cristina ^{[3
]}

Cichetto, Leonelio, Jr. ^{[4
]}

Mariela Desimone, Paula ^{[5
,6
]}

Manuel Aldao, Celso ^{[6
,7
]}

Adolfo Ponce, Miguel ^{[5
,6
]}

Gracia, Lourdes ^{[2
]}

Sambrano, Julio R. ^{[3
]}

Longo, Elson ^{[4
]}

Andres, Juan ^{[2
]}

Simoes, Alexandre Zirpoli ^{[1
]}

机构：

[1] Sao Paulo State Univ UNESP, Sch Engn, BR-12516410 Guaratingueta, SP, Brazil

[2] Univ Jaume I UJI, Dept Analyt & Phys Chem, Castellon de La Plana 12071, Spain

[3] Sao Paulo State Univ UNESP, Modeling & Mol Simulat Grp, BR-17033360 Bauru, SP, Brazil

[4] Fed Univ Sao Carlos UFSCar, Funct Mat Dev Ctr, Sao Carlos, SP, Brazil

[5] Univ Mar Del Plata, Inst Mat Sci & Technol INTEMA, RA-7600 Mar Del Plata, Argentina

[6] Natl Res Council CONICET, Juan B Justo 4302,B7608FDQ, RA-7600 Mar Del Plata, Argentina

[7] Univ Mar del Plata, Inst Sci & Technol Res Elect ICYTE, Juan B Justo 4302,B7608FDQ, Mar Del Plata, Argentina

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 10期

基金：

巴西圣保罗研究基金会;

关键词：

CeO2; Surfaces; Interfaces; Electrical properties; SENSING PROPERTIES; PHOTOCATALYTIC DEGRADATION; DEFECT STRUCTURE; NICKEL-OXIDE; BAND-GAP; PLUS U; CERIA; SPECTRA; NIO; PERFORMANCE;

D O I：

10.1016/j.ceramint.2022.01.286

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present work, the structural, morphological and electrical properties of CeO2 nanoparticles with spherical and rod-like morphologies and rods decorated with Ni2O3 were investigated. Morphological, structural and electronic analyses showed a relationship between the shape/size of particles and the respective surface types, number of carriers, density of vacancies and local structural atomic order, in addition to an influence on the electrical properties of the materials. Electrical analyses revealed that the rod-like morphology has a better CO sensor response than the spherical one. In order to complement and rationalize the experimental findings, simulations at the density functional theory (DFT) were carried out to investigate the two possible mechanisms (Langmuir-Hinshelwood and Mars-Van Krevelen) acting on the CO adsorption process and elucidate the behavior of the sensor in heterojunction-type samples.

引用

页码：14014 / 14025

页数：12

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