Enhanced methane electrooxidation by ceria and nickel oxide impregnated perovskite anodes in solid oxide fuel cells

Co3O4-Impregnated NiO–YSZ: An Efficient Catalyst for Direct Methane Electrooxidation

“…The i o value of 3.1 mA cm –1 estimated for the benchmark anode, N–Y in H 2 , is lower compared to the values found in the literature (Table ). The reason for the low i o value of N–Y anode in H 2 could arise because of the following reasons: first, the percolation of Ni falls below 30 vol % in the N–Y anode (1:1 ratio of NiO and YSZ in wt %), affecting the triple-phase boundary and electrical conductivity, which can hinder the kinetics of electrooxidation, leading to reduced i o values (3.1 mA cm –2 ) as reported in our previous work . Second, the reason for higher values reported in the literature could also be due to usage of Pt and/or Rh current collectors .…”

“…The i o value of as reported in our previous work. 19 Second, the reason for higher values reported in the literature could also be due to usage of Pt and/or Rh current collectors. 14 The E a for hydrogen oxidation in our analysis for the benchmark N−Y anode (84.5 kJ mol −1 ) was comparable to that reported in the literature 14 (90 ± 10 kJ mol −1 ).…”

“…As the rate of the electrochemical reaction is proportional to the exchange current density ( i o ), i o is considered the primary descriptor of kinetic facility and is extracted at high overpotential regions of the polarization curve . Our recent study also showcases the estimation of i o on impregnated perovskite anodes for methane electrooxidation in SOFCs. , The i o values from the literature for various metal cermets and alloys in hydrogen and methane are compiled and reported in Table .…”

“…18 Our recent study also showcases the estimation of i o on impregnated perovskite anodes for methane electrooxidation in SOFCs. 19,20 The i o values from the literature for various metal cermets and alloys in hydrogen and methane are compiled and reported in Table 1. This work emphasizes the electrochemical isolation and study of Co 3 O 4 -impregnated NiO−YSZ anode for methane electrooxidation.…”

Achieving performance and longevity with butane-operated low-temperature solid oxide fuel cells using low-cost Cu and CeO2 catalysts

“…53 However, most of these studies were performed under hightemperature conditions, from 750 to 900 C, and with methane as the fuel. [54][55][56][57] In this work, Cu and CeO 2 were incorporated into two different regions of a TF-SOFC to achieve both high performance and durability of the ISRB-SOFC. Cu was sputterdeposited at the AFL via sandwich-like placement between the NiO-YSZ composite layers.…”