Formic acid oxidation on AuPd core-shell electrocatalysts: Effect of surface electronic structure
AuPd core-shell electrocatalysts were synthesized with cubic, cuboctahedric and octahedral shapes to study the electronic effects of these nanostructures on the formic acid oxidation reaction, FAOR. The morphology and the surface electronic structure of the different AuPd core-shell were examined by...
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Veröffentlicht in: | Electrochimica acta 2019-12, Vol.327, p.134977, Article 134977 |
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creator | Romero Hernández, A. Arce Estrada, E.M. Ezeta, A. Manríquez, M.E. |
description | AuPd core-shell electrocatalysts were synthesized with cubic, cuboctahedric and octahedral shapes to study the electronic effects of these nanostructures on the formic acid oxidation reaction, FAOR. The morphology and the surface electronic structure of the different AuPd core-shell were examined by high-resolution transmission electron microscopy, HRTEM, and X-ray photoelectron spectroscopy, XPS, respectively. The FAOR was analyzed by the binding energy of the d-band center of each core-shell nanostructure and its electrocatalytic behavior. The octahedron shape presents better affinity for the CO adsorption-desorption processes and higher overpotentials than the other electrocatalyst. Therefore, the FAOR indirect route is encouraged. Contrariwise, the cubic nanostructure favors the FAOR direct route due to its exchange current density of 1.741 mA cm−2 that suggest a fast kinetic associated with the lowest d-band binding energy among all the core-shell nanostructures. |
doi_str_mv | 10.1016/j.electacta.2019.134977 |
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The morphology and the surface electronic structure of the different AuPd core-shell were examined by high-resolution transmission electron microscopy, HRTEM, and X-ray photoelectron spectroscopy, XPS, respectively. The FAOR was analyzed by the binding energy of the d-band center of each core-shell nanostructure and its electrocatalytic behavior. The octahedron shape presents better affinity for the CO adsorption-desorption processes and higher overpotentials than the other electrocatalyst. Therefore, the FAOR indirect route is encouraged. 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Contrariwise, the cubic nanostructure favors the FAOR direct route due to its exchange current density of 1.741 mA cm−2 that suggest a fast kinetic associated with the lowest d-band binding energy among all the core-shell nanostructures.</description><subject>Binding energy</subject><subject>Core-shell nanostructures</subject><subject>Core-shell structure</subject><subject>D-band center</subject><subject>Electrocatalysis</subject><subject>Electrocatalysts</subject><subject>Electronic properties</subject><subject>Electronic structure</subject><subject>Electrons</subject><subject>FAOR</subject><subject>Formic acid</subject><subject>Intermetallic compounds</subject><subject>Morphology</subject><subject>Nanostructure</subject><subject>Oxidation</subject><subject>Photoelectrons</subject><subject>X ray photoelectron spectroscopy</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LAzEQhoMoWKu_wQXPWyebbZL1VkqrQkEPeg7ZZIIp26Ymu2L_valVr8LAwPB-MA8h1xQmFCi_XU-wQ9PrPJMKaDOhrG6EOCEjKgUrmZw2p2QEQFlZc8nPyUVKawAQXMCI6GWIG28Kbbwtwqe3uvdhW-SZDc-2MCFimd6w64rvlhiM7nW3T326KxbO5VMRXJGG6LTBX802B6Y-DqYfIl6SM6e7hFc_e0xel4uX-UO5erp_nM9WpWES-nLquMOKOytq1rYUnEHGOLQCNUWQVFrRNlA11roWm7amQnIqqpobnGJjgY3JzTF3F8P7gKlX6zDEba5UFatYDbKWTVaJo8rEkFJEp3bRb3TcKwrqwFOt1R9PdeCpjjyzc3Z0Yn7iw2NUyXjcGrQ-Zr2ywf-b8QV_f4QP</recordid><startdate>20191210</startdate><enddate>20191210</enddate><creator>Romero Hernández, A.</creator><creator>Arce Estrada, E.M.</creator><creator>Ezeta, A.</creator><creator>Manríquez, M.E.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20191210</creationdate><title>Formic acid oxidation on AuPd core-shell electrocatalysts: Effect of surface electronic structure</title><author>Romero Hernández, A. ; Arce Estrada, E.M. ; Ezeta, A. ; Manríquez, M.E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-5f6fe26fd743bb10fce3360b7ea1e0818d7b9029ddfbe9b4178617246ce5e9d03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Binding energy</topic><topic>Core-shell nanostructures</topic><topic>Core-shell structure</topic><topic>D-band center</topic><topic>Electrocatalysis</topic><topic>Electrocatalysts</topic><topic>Electronic properties</topic><topic>Electronic structure</topic><topic>Electrons</topic><topic>FAOR</topic><topic>Formic acid</topic><topic>Intermetallic compounds</topic><topic>Morphology</topic><topic>Nanostructure</topic><topic>Oxidation</topic><topic>Photoelectrons</topic><topic>X ray photoelectron spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Romero Hernández, A.</creatorcontrib><creatorcontrib>Arce Estrada, E.M.</creatorcontrib><creatorcontrib>Ezeta, A.</creatorcontrib><creatorcontrib>Manríquez, M.E.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Romero Hernández, A.</au><au>Arce Estrada, E.M.</au><au>Ezeta, A.</au><au>Manríquez, M.E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Formic acid oxidation on AuPd core-shell electrocatalysts: Effect of surface electronic structure</atitle><jtitle>Electrochimica acta</jtitle><date>2019-12-10</date><risdate>2019</risdate><volume>327</volume><spage>134977</spage><pages>134977-</pages><artnum>134977</artnum><issn>0013-4686</issn><eissn>1873-3859</eissn><abstract>AuPd core-shell electrocatalysts were synthesized with cubic, cuboctahedric and octahedral shapes to study the electronic effects of these nanostructures on the formic acid oxidation reaction, FAOR. The morphology and the surface electronic structure of the different AuPd core-shell were examined by high-resolution transmission electron microscopy, HRTEM, and X-ray photoelectron spectroscopy, XPS, respectively. The FAOR was analyzed by the binding energy of the d-band center of each core-shell nanostructure and its electrocatalytic behavior. The octahedron shape presents better affinity for the CO adsorption-desorption processes and higher overpotentials than the other electrocatalyst. Therefore, the FAOR indirect route is encouraged. Contrariwise, the cubic nanostructure favors the FAOR direct route due to its exchange current density of 1.741 mA cm−2 that suggest a fast kinetic associated with the lowest d-band binding energy among all the core-shell nanostructures.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.electacta.2019.134977</doi></addata></record> |
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subjects | Binding energy Core-shell nanostructures Core-shell structure D-band center Electrocatalysis Electrocatalysts Electronic properties Electronic structure Electrons FAOR Formic acid Intermetallic compounds Morphology Nanostructure Oxidation Photoelectrons X ray photoelectron spectroscopy |
title | Formic acid oxidation on AuPd core-shell electrocatalysts: Effect of surface electronic structure |
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