<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-8196</journal-id>
<journal-title><![CDATA[Epistemus (Sonora)]]></journal-title>
<abbrev-journal-title><![CDATA[Epistemus (Sonora)]]></abbrev-journal-title>
<issn>2007-8196</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-81962022000200099</article-id>
<article-id pub-id-type="doi">10.36790/epistemus.v16i33.240</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Catalizadores de tres vías: historia, funcionamiento y ventajas ambientales]]></article-title>
<article-title xml:lang="en"><![CDATA[Three-Way Catalysts: History, Performance and Environmental Advantages]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro-Espinoza]]></surname>
<given-names><![CDATA[Sofía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meza-Figueroa]]></surname>
<given-names><![CDATA[Diana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedroza-Montero]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Puebla]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sonora Departamento de Ciencia Químico-Biológicas ]]></institution>
<addr-line><![CDATA[Hermosillo México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Sonora Departamento de Geología ]]></institution>
<addr-line><![CDATA[Hermosillo ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación en Física ]]></institution>
<addr-line><![CDATA[Hermosillo ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación en Física ]]></institution>
<addr-line><![CDATA[Hermosillo ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>16</volume>
<numero>33</numero>
<fpage>99</fpage>
<lpage>105</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-81962022000200099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-81962022000200099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-81962022000200099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El catalizador de tres vías es una herramienta utilizada para reducir la emisión de gases contaminantes liberados por el motor de combustión interna de un automóvil. Este trabajo tiene como objetivo proporcionar una comprensión del funcionamiento e importancia de los catalizadores de tres vías. Se presenta una descripción general de la evolución histórica de su desarrollo, hasta llegar a la formulación y estructura de los catalizadores actuales. Además, se describe su funcionamiento a nivel molecular y las condiciones de operación que aseguran su eficiencia de conversión. Discutimos las ventajas al medio ambiente y a la salud humana que acompañan su uso adecuado. Por último, se remarca la importancia de su reemplazo oportuno.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Three-way catalyst is a tool used to reduce the emission of pollutant gases released by an automobile's internal combustion engine. This paper aims to provide an understanding of the operation and the importance of the three-way catalyst. A general description of the historical evolution of their development, up to the formulation and structure of current catalysts, is presented. In addition, their operation at the molecular level and the operating conditions that ensure their conversion efficiency are described. We discuss the advantages to the environment and human health that come along with their proper use. Finally, the importance of their timely replacement is highlighted.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Catalizadores]]></kwd>
<kwd lng="es"><![CDATA[Contaminación atmosférica]]></kwd>
<kwd lng="es"><![CDATA[Emisión de gases]]></kwd>
<kwd lng="es"><![CDATA[Tráfico vehicular]]></kwd>
<kwd lng="en"><![CDATA[Catalysts]]></kwd>
<kwd lng="en"><![CDATA[Atmospheric pollution]]></kwd>
<kwd lng="en"><![CDATA[Gas emissions]]></kwd>
<kwd lng="en"><![CDATA[Vehicular traffic]]></kwd>
</kwd-group>
</article-meta>
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