Preparation, characterization and catalytic performance of single-atom catalysts

Wang, Liqiong; Huang, Liang; Liang, Feng; Liu, Simin; Wang, Yuhua; Zhang, Haijun

doi:10.1016/s1872-2067(17)62770-0

Cited by 76 publications

(29 citation statements)

References 75 publications

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“…Single-atom catalysts (SACs), with only isolated single-atom dispersion on the support surface, have attracted extensive attention in many kinds of catalysis community recently due to their maximum atom-utilization efficiency, high selectivity, and unique properties [73][74][75][76][77][78][79][80]. The first reported SACs by Zhang's groups occurred in 2011 where a coprecipitation method was employed to synthesize Pt SACs on iron oxide substrate (Pt 1 /FeO x ), showing high performance and durability toward the CO oxidation [74].…”

Section: Introductionmentioning

confidence: 99%

Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

et al. 2020

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HIGHLIGHTS• All the important single-atom catalysts (SACs) synthetic strategies, such as wet-chemistry method, atomic layer deposition, metalorganic framework-derived method, electrodeposition, high-temperature atom trapping from bulk particles, and vacancies/defects immobilized strategy, have been summarized and discussed in detail.• Various metal-based (especially Pt, Pd, Ru, Fe, Co, Ni, Mo, W, V) SACs in electrocatalytic hydrogen evolution reaction (HER) have been systematically reviewed.• The current key challenges in SACs for electrochemical HER are pointed out, and some potential strategies/perspectives are proposed.ABSTRACT Hydrogen, a renewable and outstanding energy carrier with zero carbon dioxide emission, is regarded as the best alternative to fossil fuels. The most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources (e.g., wind, solar, hydro, and tidal energy). However, the efficiency of water electrolysis is very much dependent on the activity of electrocatalysts. Thus, designing high-effective, stable, and cheap materials for hydrogen evolution reaction (HER) could have a substantial impact on renewable energy technologies. Recently, single-atom catalysts (SACs) have emerged as a new frontier in catalysis science, because SACs have maximum atom-utilization efficiency and excellent catalytic reaction activity.Various synthesis methods and analytical techniques have been adopted to prepare and characterize these SACs. In this review, we discuss recent progress on SACs synthesis, characterization methods, and their catalytic applications. Particularly, we highlight their unique electrochemical characteristics toward HER. Finally, the current key challenges in SACs for HER are pointed out and some potential directions are proposed as well. E le c tr on m ic ro s co py MO F-W e t-C h e m is t r y AL D De rived Sp ec tr o s c o p y te ch n iq u e H ER Im m o b il iz ed ato m tr ap p in g d e po sit ion E le ct ro-S iO 2

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Section: Introductionmentioning

confidence: 99%

Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

et al. 2020

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“…Wet chemical routes, such as incipient wetness impregnation (IWI) and strong electrostatic adsorption methods, are common in laboratory-scale catalyst synthesis. However, they are best suited to low metal loadings 1,35,36 and are often time-consuming and process intensive, which is unfavorable for scale-up 18,37 . In addition, the thermal stability of the resulting SACs is typically poor 18,35 .…”

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confidence: 99%

Strong metal-support interaction promoted scalable production of thermally stable single-atom catalysts

et al. 2020

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Single-atom catalysts (SACs) have demonstrated superior catalytic performance in numerous heterogeneous reactions. However, producing thermally stable SACs, especially in a simple and scalable way, remains a formidable challenge. Here, we report the synthesis of Ru SACs from commercial RuO 2 powders by physical mixing of sub-micron RuO 2 aggregates with a MgAl 1.2 Fe 0.8 O 4 spinel. Atomically dispersed Ru is confirmed by aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy. Detailed studies reveal that the dispersion process does not arise from a gas atom trapping mechanism, but rather from anti-Ostwald ripening promoted by a strong covalent metalsupport interaction. This synthetic strategy is simple and amenable to the large-scale manufacture of thermally stable SACs for industrial applications.

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“…CoS and Co 9 S 8 have been extensively investigated and their reversible Na-storage mechanism has been confirmed via conversion reactions. [22] As illustrated in Figure 2, CoS possesses ah exagonal-analogous structure,w ith as pace group of P6 3 /mmc (a = b = 3.37 and c = 5.14 ). [23] In contrast, Co 9 S 8 has ac ubic close-packed arrangement with the Fm3m group (a = b = c = 9.927 ).…”

Section: Ms X Based On Conversion Reactionsmentioning

confidence: 99%

Sulfur‐Based Electrodes that Function via Multielectron Reactions for Room‐Temperature Sodium‐Ion Storage

et al. 2019

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Emerging rechargeable sodium‐ion storage systems—sodium‐ion and room‐temperature sodium–sulfur (RT‐NaS) batteries—are gaining extensive research interest as low‐cost options for large‐scale energy‐storage applications. Owing to their abundance, easy accessibility, and unique physical and chemical properties, sulfur‐based materials, in particular metal sulfides (MSx) and elemental sulfur (S), are currently regarded as promising electrode candidates for Na‐storage technologies with high capacity and excellent redox reversibility based on multielectron conversion reactions. Here, we present current understanding of Na‐storage mechanisms of the S‐based electrode materials. Recent progress and strategies for improving electronic conductivity and tolerating volume variations of the MSx anodes in Na‐ion batteries are reviewed. In addition, current advances on S cathodes in RT‐NaS batteries are presented. We outline a novel emerging concept of integrating MSx electrocatalysts into conventional carbonaceous matrices as effective polarized S hosts in RT‐NaS batteries as well. This comprehensive progress report could provide guidance for research toward the development of S‐based materials for the future Na‐storage techniques.

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Preparation, characterization and catalytic performance of single-atom catalysts

Cited by 76 publications

References 75 publications

Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

Strong metal-support interaction promoted scalable production of thermally stable single-atom catalysts

Sulfur‐Based Electrodes that Function via Multielectron Reactions for Room‐Temperature Sodium‐Ion Storage

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