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Perovskite Oxides as Electrocatalyst for Glycerol Oxidation.

preprint
submitted on 15.07.2020 and posted on 15.07.2020 by Patrícia Santiago, Carlos C. Lima, José L. Bott-Neto, Pablo Fernández, Camilo A. Angelucci, Janaina Souza-Garcia
Glycerol is a co-product from Biodiesel production with high abundance and low market price. Its transformation into valuable products or as an alternative source of energy has driven the search for selective catalysts. Herein we present the first findings of perovskites as electrocatalysts for glycerol electrooxidation (GEOR). Alternatively to Pt and Pd based catalyst, perovskite oxides (LaNiO3 and LaCoO3) demonstrated high catalytic performance with faradaic currents of ca. 18 mA mg-1 at potentials higher than 1.6 V vs. RHE. Consecutive potential cycles exhibited the LaCoO3 perovskite resistant to poisoning during GEOR. Based on FTIR and online HPLC experiments the GEOR on perovskite oxides yields formic acid and glycolic acid as final products, with no signal of CO2 formation. Our results thus indicate that perovskites can be considered as an alternative for selectively oxidize glycerol, opening the door for a large variety of a new class of catalysts for polyols oxidation with efficiency in terms of current densities and poisoning stability.

Funding

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) - Project 2018/06677-6

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) - Project 2018/10292-2

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) - Project 2016/01365-0

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) - Project 2017/11986-5

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) - Project 2018/20952-

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) - Project 2019/07449-0

Shell and the strategic importance of the support given by ANP (Brazil’s National Oil, Natural Gas and Biofuels Agency) through the R&D levy regulation

History

Email Address of Submitting Author

janaina.garcia@ufabc.edu.br

Institution

Federal University of ABC

Country

Brazil

ORCID For Submitting Author

0000-0002-4715-6315

Declaration of Conflict of Interest

No conflict of interest

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