Exsolution of Ni Nanoparticles from A-Site-Deficient Layered Double Perovskites for Dry Reforming of Methane and as an Anode Material for a Solid Oxide Fuel Cell

Abstract

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A Flexible Method to Fabricate Exsolution‐Based Nanoparticle‐Decorated Materials in Seconds

“…This was mainly derived from the numerously exsolved nanocatalysts, yielding abundant active sites for the electrochemical reaction. [ 8 , 18 , 20 , 33 , 35 ]…”

“…This was mainly derived from the numerously exsolved nanocatalysts, yielding abundant active sites for the electrochemical reaction. [8,18,20,33,35] As to the electrochemical oxidation of hydrogen (Figure S11, Supporting Information), generally, it can be expressed by the Kröger-Vink notation (1). When the nanocatalysts are uniformly dispersed on the surface of oxide support, dissociative adsorption of hydrogen molecule dynamically takes place on the surface of the nanocatalyst, enhancing the kinetics of adsorption and desorption processes.…”

“…Different from the deposition method to fabricate the nanoparticle‐decorated materials (NDMs), [ 13 , 14 ] the products prepared by exsolution technique generally exhibit good spatial distribution and thermal stability due to the strong bonding between nanoparticle and support. [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ] Therefore, exsolution‐based NDMs are broadly applied in all‐solid electrochemical cells. [ 11 , 18 , 22 , 23 ]…”

“…[11,18,22,23] Conventionally, exsolution-based NDMs are usually prepared via chemical gas treatment. [20,24] Because of the sluggish diffusion of ions traversing from bulk to the surface of the perovskite support, normally tens of hours are needed to obtain the NDM products. As a result, the size of the exsolved nanoparticles is usually large due to the overlap with neighboring particles during the long-time treatment, resulting in an underestimated improvement of the electrocatalytic activity by this technique.…”

Strengthening the Connection between Science, Society and Environment to Develop Future French and European Bioeconomies: Cutting-Edge Research of VAALBIO Team at UCCS

“…In the laboratory, H 2 production is studied from ethanol by steam reforming (SRE), partial oxidation and oxidative steam reforming (OSRE, including autothermal reforming) reactions [82][83][84][85][86], and from CH 4 , by dry reforming (DRM) and oxidative dry reforming (ODRM) reactions [40,[87][88][89][90]. These last reactions are of particular interest because they allow the transformation and valorization of two greenhouse gases (CH 4 and CO 2 ), and also can be applied to fuel cells [90].…”