Ultralow-Loading Ruthenium Catalysts by Plasma-Enhanced Atomic Layer Deposition for a Solid Oxide Fuel Cell

Kye, Seunghyeon; Kim, Hyong June; Go, Dohyun; Yang, Byung Chan; Shin, Jeong Woo; Lee, Sungje; An, Jihwan

doi:10.1021/acscatal.0c04526

Cited by 22 publications

(12 citation statements)

References 41 publications

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“…The complete oxidation of CH 4 to CO 2 in solid oxide fuel cells to generate electricity is also being investigated; however, high operating temperature (300−700 °C), rapid drop in efficiency due to coke deposition, and sulfur poisoning are other unsolved issues. 16,17 Another, approach to utilize methane as a feedstock is thermocatalytic nonoxidative partial dehydrogenation to alkenes and aromatics which requires high temperature. Partial dehydrogenation is advantageous over complete dehydrogenation, as it produces platform chemicals that can be directly used for the chemical synthesis along with hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Single Atom Catalysts for Selective Methane Oxidation to Oxygenates

Kumar

Al‐Attas

et al. 2022

ACS Nano

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Direct conversion of methane (CH 4 ) to C 1−2 liquid oxygenates is a captivating approach to lock carbons in transportable value-added chemicals, while reducing global warming. Existing approaches utilizing the transformation of CH 4 to liquid fuel via tandemized steam methane reforming and the Fischer−Tropsch synthesis are energy and capital intensive. Chemocatalytic partial oxidation of methane remains challenging due to the negligible electron affinity, poor C−H bond polarizability, and high activation energy barrier. Transition-metal and stoichiometric catalysts utilizing harsh oxidants and reaction conditions perform poorly with randomized product distribution. Paradoxically, the catalysts which are active enough to break C−H also promote overoxidation, resulting in CO 2 generation and reduced carbon balance. Developing catalysts which can break C−H bonds of methane to selectively make useful chemicals at mild conditions is vital to commercialization. Single atom catalysts (SACs) with specifically coordinated metal centers on active support have displayed intrigued reactivity and selectivity for methane oxidation. SACs can significantly reduce the activation energy due to induced electrostatic polarization of the C−H bond to facilitate the accelerated reaction rate at the low reaction temperature. The distinct metal−support interaction can stabilize the intermediate and prevent the overoxidation of the reaction products. The present review accounts for recent progress in the field of SACs for the selective oxidation of CH 4 to C 1−2 oxygenates. The chemical nature of catalytic sites, effects of metal−support interaction, and stabilization of intermediate species on catalysts to minimize overoxidation are thoroughly discussed with a forward-looking perspective to improve the catalytic performance.

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Section: Introductionmentioning

confidence: 99%

Single Atom Catalysts for Selective Methane Oxidation to Oxygenates

Kumar

Al‐Attas

et al. 2022

ACS Nano

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“…In contrast, ALD offers the advantage of reproducibly introducing metal nanocatalysts with high uniformity even on complicated structures and easily depositing composite oxides with diverse compositions. [77][78][79][80][81][82][83][84][85][86] Recently, Tsampas reported an example of successful electrode activity enhancement using ALD by uniformly coating Pt nanocatalysts onto an LSCM electrode (Fig. 8a).…”

Section: Studies Of the Chemical/electrochemical Functionalization Of Electrodesmentioning

confidence: 99%

“…In addition, An et al reported that the plasma-enhanced atomic layer deposition (PEALD) technique can significantly reduce the amount of precious metal usage (2 ~ 100 times) by achieving efficient metal catalyst dispersion compared to the conventional sputtering method. 81 PEALD is a type of ALD that uses plasma as a reactant. It is known to facilitate nucleation in the first few cycles compared to general thermal ALD, providing metal nanocatalysts with high density levels using a very small number of ALD cycles.…”

Section: Studies Of the Chemical/electrochemical Functionalization Of Electrodesmentioning

confidence: 99%

Nanoscale interface engineering for solid oxide fuel cells using atomic layer deposition

et al. 2022

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“…reported ultralow (8 nm) loading of ruthenium catalyst on SDC anode for direct methanol solid oxide fuel cells, and compared the performance of electrodes prepared by plasma‐enhanced atomic layer deposition (PEALD) and sputtering technique (Figure 13e). [ 232 ] Where, PEALD technique achieved fine dispersion and ultralow loading (5%) of Ru nanoparticles, while sputtered Ru was not able to penetrate into the pores and build up on top of the SDC columnar structure (Figure 13f). The Ru/SDS anodes achieved 30% higher power density with high thermal density when compared to unmodified SDC structures.…”

Section: Ald In Fuel Cellsmentioning

confidence: 99%

“…The Ru/SDS anodes achieved 30% higher power density with high thermal density when compared to unmodified SDC structures. [ 232 ]…”

Section: Ald In Fuel Cellsmentioning

confidence: 99%

Recent Advances in Materials Design Using Atomic Layer Deposition for Energy Applications

Gupta

Hossain

Riaz

et al. 2021

Adv Funct Materials

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The design and development of materials at the nanoscale has enabled efficient, cutting‐edge renewable energy storage, and conversion devices such as solar cells, water splitting, fuel cells, batteries, and supercapacitors. In addition to creating new materials, the ability to refine the structure and interface properties holds the key to achieving superior performance and durability of these devices. Atomic layer deposition (ALD) has become an important tool for nanofabrication as it allows the deposition of pin‐hole‐free films with atomic‐level thickness and composition control over high aspect ratio surfaces. ALD is successfully used to fabricate devices for renewable energy storage and conversion, for example, to deposit absorber materials, passivation layers, selective contacts, catalyst films, protection barriers, etc. In this review article, recent advances enabled by ALD in designing materials for high‐performance solar cells, catalytic energy conversion systems, batteries, and fuel cells, are summarized. The critical issues impeding the performance and durability of these devices are introduced and then the role of ALD in addressing them is discussed. Finally, the challenges in the implementation of ALD technique for nanofabrication on industrial scale are highlighted and a perspective on potential solutions is provided.

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Ultralow-Loading Ruthenium Catalysts by Plasma-Enhanced Atomic Layer Deposition for a Solid Oxide Fuel Cell

Cited by 22 publications

References 41 publications

Single Atom Catalysts for Selective Methane Oxidation to Oxygenates

Single Atom Catalysts for Selective Methane Oxidation to Oxygenates

Nanoscale interface engineering for solid oxide fuel cells using atomic layer deposition

Recent Advances in Materials Design Using Atomic Layer Deposition for Energy Applications

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