Oxygen Evolution Reaction over the Au/YSZ Interface at High Temperature

Abstract

The oxygen evolution reaction (OER) is as luggish electrocatalytic reaction in solid oxide electrolysis cells (SOECs) at high temperatures (600-850 8 8C). Perovskite oxide has been widely investigated for catalyzing the OER;however, the formation of cation-enriched secondary phases at the oxide/ oxide interface blocks the active sites and decreases OER performance.H erein, we showt hat the Au/yttria-stabilized zirconia (YSZ) interface possesses muchh igher OER activity than the lanthanum strontium manganite/YSZ anode.Electrochemical characterization and density functional theory calculations suggest that the Au/YSZ interface provides af avorable path for OER by triggering interfacial oxygen spillover from the YSZt ot he Au surface.I ns itu X-ray photoelectron spectroscopyr esults confirm the existence of spillover oxygen on the Au surface.T his study demonstrates that the Au/YSZ interface possesses excellent catalytic activity for OER at high temperatures in SOECs.

Selective Oxidative Coupling of Methane to Ethylene in a Solid Oxide Electrolyser Based on Porous Single‐Crystalline CeO2 Monoliths

“…Dioxygen species such as O 2 2− , O 2 − and O 2− show moderate reactivity towards CH 4 , which are favorable for the generation of C 2 products. Since O − is highly active, an excessive amount inevitably leads to the deep oxidation of CH 4 to CO 2 [10, 33, 34] . With the increase in positive voltages from 1.5 to 2.0 V, the intensity of active oxygen species dramatically increases, indicating the enhanced flux of active oxygen species driven by the external electrical field under mild temperatures.…”

“…Solid oxide electrolysers (SOEs) have attracted much attention because of their high efficiency in using renewable electricity to convert electrical energy into fuels and chemicals [10–15] . Their advantages of long lifetime, flexible scale and low cost show great potential for practical applications.…”

Manipulating Interfaces of Electrocatalysts Down to Atomic Scales: Fundamentals, Strategies, and Electrocatalytic Applications

“…To this end, the O atoms adsorbed on the Au cluster in the Au/YSZ could react and form O 2 molecules with a low energy barrier of 1.28 eV and the heat of formation approaching zero. [ 169 ] In particular, the oxidation in some specific electrocatalyst, like phosphides, carbides, etc., needs to be considered during the OER process. Liu et al.…”

Platinum‐Decorated Ceria Enhances CO2 Electroreduction in Solid Oxide Electrolysis Cells

“…Metal/oxide interfaces have been widely constructed to improve catalytic performance through their ability to change the chemical state of catalyst [10] by enhancingt he adsorption and activation of reactantm olecules [11] and the stability of reaction intermediates. [12] Metal nanoparticles decorated onto the oxide surfacec ould also increaset he interfacial oxygen vacancy concentration [13] andf urthere nhance CO 2 adsorption. [14] Therefore, the constructiono fm etal/oxide interfaces is expected to be beneficial for CO 2 electroreduction.I nt his study,P t/ SDC interfacesw ith different Pt loadings of 0, 0.005, 0.01, and 0.015 (mole fractions) were constructed by decorating Pt nanoparticles onto the SDCs urfaces, denoted as SDC, SDC-0.005 Pt, SDC-0.01 Pt, and SDC-0.015 Pt, respectively.T hen, the corresponding LSCF-SDC-x Pt composite cathodes were integrated into SOECs (Figure 1b).…”