Nickel–Copper/Gadolinium‐Doped Ceria (CGO) Composite Electrocatalyst as a Protective Layer for a Solid‐Oxide Fuel Cell Anode Fed with Ethanol

Abstract

A nickel–copper alloy is prepared by using the oxalate method and subsequent in situ reduction. The bimetallic alloy is mixed with gadolinium‐doped ceria (CGO) to obtain a composite material with mixed electronic–ionic conductivity. The catalytic and electrocatalytic properties of the composite material for ethanol conversion are described. Different conditions to simulate bio‐ethanol feed operation are selected. Electrochemical tests are performed by utilizing the NiCu/CGO cermet as a barrier layer in a conventional anode‐supported solid‐oxide fuel cell (AS‐SOFC). A comparative study between the modified cell and a conventional AS‐SOFC without the protective layer is made. A maximum power density of 277 mW cm−2@0.63 V is recorded in the presence of a mixture of ethanol–water for a cell containing the protective anodic layer compared with 231 mW cm−2@0.64 V for a bare cell under the same conditions. This corresponds to a 20 % increase in performance.

Investigation of Ni-based alloy/CGO electro-catalysts as protective layer for a solid oxide fuel cell anode fed with ethanol

“…This confirms the need to avoid a large ensemble of pure Ni atoms as first catalytic layer in the presence of dry organic fuel feed. In this work, we have focused our efforts on a novel Ni-Co/ CGO combination for the electro-catalytic anode pre-layer in a SOFC and compared this formulation to the baseline Ni-Cu/CGO catalyst [25] in a process using ethanol feed.…”

Nickel‐Iron Alloy Nanoparticle‐Decorated K2NiF4‐Type Oxide as an Efficient and Sulfur‐Tolerant Anode for Solid Oxide Fuel Cells

“…A solid oxide fuel cell (SOFC) is an environmentally friendly and efficient device for generating electricity from various fuels for energy conversion . As an important component of the SOFC, the anode catalyzes the fuel oxidation/reaction and transports the charges generated from the electrochemical reactions among the triple phase boundaries (TPBs).…”

Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO2modified Pt/C

“…On the other hand, the helical spindle-like Heli-CeO 2 supported carbon black showed signicantly improved dispersion and distribution of the Pt nanoparticles, as presented in Fig. 18,32,33 Therefore, the surface electronic properties of Pt were modied, attributed to a shi in the d-band center of the surface Pt atoms, to induce a higher concentration of metallic Pt(0). The average diameter of the Pt nanoparticles with well-dened ngerprints (Fig.…”