Developing a Thermal- and Coking-Resistant Cobalt–Tungsten Bimetallic Anode Catalyst for Solid Oxide Fuel Cells

Yan, Ning; Pandey, Jay; Zeng, Yimin; Amirkhiz, Babak Shalchi; Hua, Bin; Geels, Norbert J.; Luo, Jing‐Li; Rothenberg, Gadi

doi:10.1021/acscatal.6b01197

Cited by 27 publications

(18 citation statements)

References 60 publications

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“…Alternatively, the use of a well‐established perovskite oxide to form a cermet through coupling with a metallic catalyst (e.g., Co, Fe, Ni, Pd) could effectively overcome these obstacles . LSCM has low electronic conductivity as it has p‐type conduction behavior.…”

Section: The Evolution Of Perovskite Fuel Electrodesmentioning

confidence: 99%

Enhancing Perovskite Electrocatalysis of Solid Oxide Cells Through Controlled Exsolution of Nanoparticles

et al. 2017

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Perovskite oxides have received a great deal of attention as promising electrodes in both solid oxide fuel cells (SOFCs) and solid oxide electrolyzer cells (SOECs) because of their reasonable reactivity, impurity tolerance, and tunable properties. In particular, exploration is still required for improving perovskite electrodes, which normally suffer from slow kinetics in electrocatalysis. Experimental studies have led to the development of new classes of perovskites with advanced characteristics and electrode kinetics at technical levels. In parallel with those developments, achievements in theoretical and computational studies have led to substantial understanding, at the atomic level, of their physicochemical properties and electrocatalytic behaviors. Their chemical and structural flexibilities enable perovskites to accommodate most metallic elements without destroying their complex matrix structures, thereby delivering a pathway to engineer their catalytic properties. In this Minireview, recent advances in perovskite electrodes are introduced, and perovskites with exsolved nanoparticles are discussed as enhanced electrocatalytic materials.

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Section: The Evolution Of Perovskite Fuel Electrodesmentioning

confidence: 99%

Enhancing Perovskite Electrocatalysis of Solid Oxide Cells Through Controlled Exsolution of Nanoparticles

et al. 2017

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“…Heterogeneous catalysts often consist of small metal particles dispersed on supports . Although many methods have been proposed for their synthesis, the most common approach involves impregnating the support with a metal precursor solution, followed by thermal decomposition and reduction at a relatively high temperature .…”

Section: Figurementioning

confidence: 99%

“…Although many methods have been proposed for their synthesis, the most common approach involves impregnating the support with a metal precursor solution, followed by thermal decomposition and reduction at a relatively high temperature . The problem is that these steps often cause sintering and/or agglomeration . Moreover, many “too‐small‐to‐be‐stable” nanoparticles form through the Ostwald ripening mechanism .…”

Section: Figurementioning

confidence: 99%

Plasma‐Assisted Synthesis of Monodispersed and Robust Ruthenium Ultrafine Nanocatalysts for Organosilane Oxidation and Oxygen Evolution Reactions

Gnanakumar

Filiz

et al. 2017

ChemCatChem

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“…Due to the controlled composition and modulated physicochemical properties, alloys have been widely adopted in many fields. [ 41–49 ] One example is oxygen reduction reaction (ORR). [ 41,42 ] Precious metal‐based alloys incorporating transition metals as ORR electrocatalysts could not only lower the cost, but also enhance the catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction

Chen

et al. 2020

Advanced Science

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fuels. [1][2][3][4][5] However, as a half reaction, oxygen evolution reaction (OER) involves multiple electron and proton transfer and is considered to be the bottleneck of the overall water splitting. [6] It is of vital importance to develop efficient OER catalysts to accelerate the sluggish reaction and reduce the energy consumption. [7][8][9] Unfortunately, although the noble metalbased catalysts (e.g., IrO 2 , RuO 2 ) have been recognized to be the state-of-the-art OER catalysts, their dearth and high cost greatly impede their scalable application and commercialization. Therefore, developing OER catalysts with low cost as well as high performance is still a great challenge.Earth-abundant transition metal (especially Fe, Co, Ni) oxides or hydroxides, which possess multiple oxidation states, are often regarded as alternatives to precious metal-based catalysts towards OER. [10,11] Among them, NiFe (oxy) hydroxide has been proven to be one of the most effective materials under alkaline conditions. It is worth noting that transition metal oxides or hydroxides are semiconductors with poor intrinsic conductivity, which greatly obstruct their catalytic performance. [12] Thus, different strategies are developed to enhance electron transfer. One common approach is to fabricate metallic precursors (metals, [13] alloys, [14,15] phosphides, [16][17][18] nitrides, [19][20][21] borides [22] ) as precatalysts. The surface would be oxidized to oxide or hydroxide as the real active sites, which is evidenced by the experimental observations after the process of OER. The heterojunction between the metallic core and the (oxy)hydroxide shell is of great benefit to charge transport and OER activity. [23,24] For example, the improved electron transfer could be attributed to the in situformed interface metal/metal hydroxide heterojunction. [23] Coupling with electrically conductive materials (carbon nanotube, [25] graphene [26] ) seems to be another promising method. There are also some studies that investigate how the vacancies increase the conductivity of the electrocatalysts. [27,28] According to density functional theory calculations, introducing oxygen vacancies led to easy excitation of delocalized electron to conduction band, and hence the conductivity was enhanced. [28] On the other hand, the electrocatalytic OER process occurs at the electrode/electrolyte interface, which means that higher value of electrochemical active surface area (ECSA) Efficient electrocatalysts for the oxygen evolution reaction (OER) are highly desirable because of the intrinsically sluggish kinetics of OER. Herein, coreshell structured nanospheres of NiFe x Sn@NiFe (oxy)hydroxide (denoted as NiFe x Sn-A) are prepared as active OER catalysts by a facile electrochemical strategy, which includes electrodeposition of NiFe x Sn alloy nanospheres on carbon cloth (CC) and following anodization. The alloy core of NiFe x Sn could promote charge transfer, and the amorphous shell of NiFe (oxy)hydroxide is defect-rich and nanoporous due to the selective electroch...

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Developing a Thermal- and Coking-Resistant Cobalt–Tungsten Bimetallic Anode Catalyst for Solid Oxide Fuel Cells

Cited by 27 publications

References 60 publications

Enhancing Perovskite Electrocatalysis of Solid Oxide Cells Through Controlled Exsolution of Nanoparticles

Enhancing Perovskite Electrocatalysis of Solid Oxide Cells Through Controlled Exsolution of Nanoparticles

Plasma‐Assisted Synthesis of Monodispersed and Robust Ruthenium Ultrafine Nanocatalysts for Organosilane Oxidation and Oxygen Evolution Reactions

Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction

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