Perovskite oxides as electrocatalyst for glycerol oxidation

[Display omitted] •LaNiO3 and LaCoO3 present catalytic activity towards glycerol electrooxidation.•At relatively high potentials, LaNiO3 and LaCoO3 are more active than metal oxide.•Substitution of the transition metal can tune the perovskite activity for GEOR.•LaCoO3 presents high resistance to sur...

Full description

Saved in:
Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2021-09, Vol.896, p.115198, Article 115198
Main Authors: Santiago, Patricia V.B., Lima, Carlos C., Bott-Neto, José L., Fernández, Pablo S., Angelucci, Camilo A., Souza-Garcia, Janaina
Format: Article
Language:English
Subjects:
Biodiesel fuels
Catalysts
Electrocatalysts
Energy sources
Glycerol
Glycerol electrooxidation reaction
In situ FTIR
online HPLC
Oxidation resistance
Palladium
Perovskites
Poisoning
Polyols
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •LaNiO3 and LaCoO3 present catalytic activity towards glycerol electrooxidation.•At relatively high potentials, LaNiO3 and LaCoO3 are more active than metal oxide.•Substitution of the transition metal can tune the perovskite activity for GEOR.•LaCoO3 presents high resistance to surface poisoning.•The products of glycerol electrooxidation are mainly glycolate and formate. Glycerol is a co-product from Biodiesel production with high abundance and low market price. Its transformation into valuable products or its use as an alternative source of energy has driven the search for selective catalysts. Herein we show first findings of perovskites as electrocatalysts for glycerol electrooxidation reaction (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. LaCoO3 exhibited resistance to poisoning during GEOR. Based on in situ FTIR and online HPLC experiments, GEOR on these perovskites yields formate and glycolate as final products, with no evidence of CO2 formation. Our results indicate that perovskites can be considered as alternative electrocatalysts for the selective oxidation of glycerol, opening the door for a new class of catalysts for polyols oxidation with efficiency in terms of current densities and poisoning resistance.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2021.115198