Catalysis of oxygen reduction reaction for H2O2 electrogeneration: The impact of different conductive carbon matrices and their physicochemical properties

Autor: Marcos R.V. Lanza, Nathália C. Verissimo, Lorena Athie Goulart, Matheus S. Kronka, Rodnei Bertazzoli, Lucia H. Mascaro, Paulo Jorge Marques Cordeiro-Junior, Mauro C. Santos
Přispěvatelé: Universidade de São Paulo (USP), Universidade Estadual Paulista (Unesp), Universidade Estadual de Campinas (UNICAMP), Universidade Federal de São Carlos (UFSCar), Universidade Federal do ABC (UFABC)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Popis: Made available in DSpace on 2021-06-25T12:28:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Carbon-based catalysts are widely used in oxygen reduction reactions (ORR) via 2e- H2O2 electrogeneration. The direct comparability of the structural proprieties of different carbon matrices applied on ORR, however, has never been tested. Here, we evaluate how the electrochemical and structural properties of different carbon-based materials, including carbon Printex XE2B (PXE2BC), Printex L6 (PL6C), carbon derived from lignin (LIGC), graphite (GRA) and glassy carbon (GC), affect on ORR. All the materials were characterized by Raman spectroscopy, X-ray photoelectron spectrometry (XPS), elementary analysis, field emission gun scanning electron microscopy, surface area measurements and electrochemical assays for the evaluation of ORR. Notably, the morphology, the size of the particles and the types of functional groups present in the structure of carbon materials were keys in the efficiency of ORR. The carbon materials PL6C and PXE2BC with high surface area and oxygenated functional groups in their structure displaced the ORR potential, facilitating the reaction. Carbon materials with less surface area, such as GRA, LIGC and GC, and whose main functional groups in their structures were non-oxygenated or nitrogenated, were less active in ORR. The displacement of the potential and the efficiency of H2O2 generation were directly dependent on the electrochemical and structural characteristics of the materials used as catalysts. These results are particularly relevant regarding a proper choice of carbon catalyst can increase the efficiency of ORR. (C) 2020 Elsevier Inc. All rights reserved. Univ Sao Paulo, Sao Carlos Inst Chem IQSC, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil Sao Paulo State Univ, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, Araraquara, SP, Brazil State Univ Campinas Unicamp, Fac Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP, Brazil Fed Univ Sao Carlos UFSCar, Dept Chem, Rodovia Washington Luiz Km 235, BR-13565905 Sao Carlos, SP, Brazil Fed Univ ABC UFABC, Lab Eletroquim & Mat Nanoestruturados LEMN, Ctr Ciencias Nat & Humanas CCNH, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP, Brazil Univ Estadual Campinas, Brazilian Water Res Ctr BWRC, BR-13083970 Campinas, SP, Brazil Sao Paulo State Univ, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, Araraquara, SP, Brazil CNPq: 465571/2014-0 CNPq: 301492/2013-1 CNPq: 302874/2017-8 CNPq: 427452/2018-0 FAPESP: 2011/14314-1 FAPESP: 2014/50945-4 FAPESP: 2016/19612-4 FAPESP: 2016/01937-4 FAPESP: 2016/08760-2 FAPESP: 2017/10118-0 FAPESP: 2017/23464-3 CAPES: 001 CAPES: 88887126/2017/00
Databáze: OpenAIRE
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