Single-atom catalysis: Bridging the homo- and heterogeneous catalysis

Chen, Fang; Jiang, Xiaoying; Zhang, Leilei; Lang, Rui; Qiao, Botao

doi:10.1016/s1872-2067(18)63047-5

Cited by 234 publications

(118 citation statements)

References 20 publications

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“…Compared with other heterogeneous materials, SACs not only possess homogenized active species for catalytic reactions which are similar to homogeneous materials, but also have extra advantages of high reusability and durability that originate from heterogeneous materials. Therefore, SACs have great advantages [73,[81][82][83][84][85][86]. Given this unique characteristic, SACs have attracted extensive attention in various kinds of catalytic applications, including HER, OER, organic catalytic reaction, oxygen reduction reaction (ORR), N 2 reduction reaction (NRR), CO 2 reduction reaction (CO 2 RR), and other important reactions [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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“…In particular, the reaction generally requires a high temperature, which tends to cause sintering of the Rh nanoparticles and hence low selectivity. For some oxide-supported Rh catalysts TNTs [17,18], ZrO 2 [19], ZnO [20], MgO [21], mesoporous MCM-41 and SBA-15 [22], molecular sieve [23], porous organic polymers [24], Rh nanoparticles are prone to sintering caused by Ostwald ripening, coalescence, or particle migration due to the weak metal-support interactions. Therefore, it is welcome to improve the thermal stability of Rh nanoparticles on supports.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Rh/MgSNTs Catalyst for Hydroformylation of Vinyl Acetate: The Rh0 was Obtained by Calcination

Chen

Liu

et al. 2019

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A simple and practical Rh-catalyzed hydroformylation of vinyl acetate has been synthesized via impregnation-calcination method using silicate nanotubes (MgSNTs) as the supporter. The Rh0 (zero valent state of rhodium) was obtained by calcination. The influence of calcination temperature on catalytic performance of the catalysts was investigated in detail. The catalysts were characterized in detail by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectrometer (XPS), atomic emission spectrometer (ICP), and Brunauer–Emmett–Teller (BET) surface-area analyzers. The Rh/MgSNTs(a2) catalyst shows excellent catalytic activity, selectivity and superior cyclicity. The catalyst could be easily recovered by phase separation and was used up to four times.

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“…I n recent years, single-atom catalysts (SACs) have attracted considerable attention as a means by which to maximize precious metal utilization and generate well-defined, uniform active sites [1][2][3][4][5][6][7][8][9] . SACs exhibit superior catalytic performance (activity and/or selectivity) for thermal oxidation 1,10-12 and hydrogenation 9,[13][14][15][16][17] , electrochemistry [18][19][20][21][22][23] , and industrially important processes such as the water-gas shift reaction, C-C coupling, C-H activation, and methanol reforming 11,[24][25][26][27] .…”

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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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Single-atom catalysis: Bridging the homo- and heterogeneous catalysis

Cited by 234 publications

References 20 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

Preparation and Characterization of Rh/MgSNTs Catalyst for Hydroformylation of Vinyl Acetate: The Rh0 was Obtained by Calcination

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

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