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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 44, n. 39, p. 21659-21672, AUG 13 2019.
• Web of Science Citations: 1

Abstract

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)

• FAPESP's process: 12/14004-5 - Investigation of the photoluminescence and photocatalytic properties of pure and Mn, Cu, and Zn-doped BaWO4 and BaMoO4 powders
• Grantee: Júlio César Sczancoski
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC