Investigation of the electrocatalytic performance for oxygen evolution reaction of Fe-doped lanthanum nickelate deposited on pyrolytic graphite sheets

Autor(es)

Gozzo, Cipriano B. ^[1] ; Soares, Mario R. S. ^{[1, 2]} ; Sczancoski, Julio C. ^[1] ; Nogueira, Icamira C. ^[3] ; Leite, Edson R. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Carlos UFSCar, Dept Chem, Sao Carlos, SP - Brazil

^[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, Campinas, SP - Brazil

^[3] Fed Univ Amazonas UFAM, Phys Dept, Manaus, AM - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 44, n. 39, p. 21659-21672, AUG 13 2019.
• Citações Web of Science: 1

Resumo

Perovskite-type metal oxides have emerged as important materials in renewable energy because the high electrocatalytic performance for oxygen evolution reaction (OER). Hence, we perform a study on the electrocatalytic properties of LaNi1-xFexO3 (x = 0.0, 0.3, 0.6, and 0.9 mol%) for OER, mainly analyzing the influence provoked by the incorporation of Fe3+ in the lattice as well as the use of pyrolytic graphite sheet (PGS) as a potential substrate for electrocatalysis. These perovskites were synthesized by the co-precipitation method. The thin film electrodes were prepared depositing the obtained powders on PGS substrates via drop-casting. Depending on the Fe3+ level, structural changes and morphological modifications were identified for these materials. The highest electrocatalytic activity for OER was detected for LaNi0.4Fe0.6O3. Besides the low charge transfer resistance, LaNi0.4Fe0.6O3 exhibited a lower overpotential (439 mV) and a smaller Tafel slope (52 mV dec(-1)) than the LaNiO3 (465 mV and 76 mV dec(-1)). (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/14004-5 - Investigação das propriedades fotoluminescentes e fotocatalíticas de pós de BaWO4 e BaMoO4 puros e dopados com Mn, Cu e Zn
• Beneficiário: Júlio César Sczancoski
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs