Electrochemical deposition as a universal route for fabricating single-atom catalysts

Zhang, Zhirong; Chen, Feng; Liu, Chunxiao; Zuo, Ming J.; Qin, Lang; Yan, Xupeng; Ye, Xing; Li, Hongliang; Si, Rui; Zhou, Shiming; Zeng, Jie

doi:10.1038/s41467-020-14917-6

Cited by 350 publications

(280 citation statements)

References 35 publications

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“…ED methods have been widely used for single-atom synthesis in recent years. However, these processes are usually either completed within hours (at least 10 h) or less controllable, which result in the formation of nanoclusters/nanoparticles at longer cycling time or higher metal precursor concentration 33 – 35 (detailed comparison shown in Supplementary Fig. 30 , Supplementary Note 9 , and Supplementary Table 10 ).…”

Section: Discussionmentioning

confidence: 99%

Site-specific electrodeposition enables self-terminating growth of atomically dispersed metal catalysts

et al. 2020

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The growth of atomically dispersed metal catalysts (ADMCs) remains a great challenge owing to the thermodynamically driven atom aggregation. Here we report a surface-limited electrodeposition technique that uses site-specific substrates for the rapid and room-temperature synthesis of ADMCs. We obtained ADMCs by the underpotential deposition of a non-noble single-atom metal onto the chalcogen atoms of transition metal dichalcogenides and subsequent galvanic displacement with a more-noble single-atom metal. The site-specific electrodeposition enables the formation of energetically favorable metal–support bonds, and then automatically terminates the sequential formation of metallic bonding. The self-terminating effect restricts the metal deposition to the atomic scale. The modulated ADMCs exhibit remarkable activity and stability in the hydrogen evolution reaction compared to state-of-the-art single-atom electrocatalysts. We demonstrate that this methodology could be extended to the synthesis of a variety of ADMCs (Pt, Pd, Rh, Cu, Pb, Bi, and Sn), showing its general scope for functional ADMCs manufacturing in heterogeneous catalysis.

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Section: Discussionmentioning

confidence: 99%

Site-specific electrodeposition enables self-terminating growth of atomically dispersed metal catalysts

et al. 2020

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“…[108][109][110] By this synthesis technique, a series of atomic transition metal-based catalysts were prepared by Zeng and coworkers, on which isolated metals including Ru, Rh, Pd, Ag, Ir, Pt, and Au were atomically anchored on the support through cathodic or anodic deposition. [111] As shown in Figure 4, low-valence and high-valence Ir SACs (Ir 1 /Co(OH) 2 ) can be produced from cathodic and anodic reactions, respectively, and Ir concentration in the solution had great influence on the metal loading of Ir 1 /Co(OH) 2 , further influencing the atomic-scale control of Ir 1 /Co(OH) 2 . At the cathode, IrCl 3þ was electrochemically reduced to produce C-Ir 1 /Co(OH) 2 , forming the low-valence Ir of Reproduced with permission.…”

Section: Atomic-scale Control Of Single Metal Atomsmentioning

confidence: 99%

“…At the cathode, IrCl 3þ was electrochemically reduced to produce C-Ir 1 /Co(OH) 2 , forming the low-valence Ir of Reproduced with permission. [111] Copyright 2020, Springer Nature. Reproduced with permission.…”

Section: Atomic-scale Control Of Single Metal Atomsmentioning

confidence: 99%

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Zhang

Guan

2020

Solar RRL

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Photocatalytic water splitting can realize a direct conversion from solar energy into green hydrogen energy, which is conducive to effectively mitigate energy crisis and environmental issues. Single‐atom catalysts (SACs) have shown great potential in photocatalytic hydrogen evolution, with unique geometric and electronic structures that help to boost mass and charge transfer during photocatalytic processes. Herein, recent advances of SACs in photocatalytic water splitting are focused upon. To decrease aggregation and realize sufficient utilization of metal atoms, different synthesis strategies for SACs are documented. For photocatalytic hydrogen evolution, the catalytic performances, active sites, and structure–property relationships of SACs including Al, Co, Ni, Pd, Ag, and Pt single sites are highlighted. The existing challenges and future directions of SACs in photocatalytic water splitting are provided.

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“…Very recently, Zhang et al developed a general electrochemical deposition strategy, which could be applied in a wide range of metals and supports for the preparation of SAECs [46]. The deposition process was carried out on both anode and cathode.…”

Section: Colloidal Strategymentioning

confidence: 99%

Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction

2020

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Oxygen reduction reaction (ORR) plays significant roles in electrochemical energy storage and conversion systems as well as clean synthesis of fine chemicals. However, the ORR process shows sluggish kinetics and requires platinum-group noble metal catalysts to accelerate the reaction. The high cost, rare reservation, and unsatisfied durability significantly impede large-scale commercialization of platinum-based catalysts. Single-atom electrocatalysts (SAECs) featuring with well-defined structure, high intrinsic activity, and maximum atom efficiency have emerged as a novel field in electrocatalytic science since it is promising to substitute expensive platinum-group noble metal catalysts. However, finely fabricating SAECs with uniform and highly dense active sites, fully maximizing the utilization efficiency of active sites, and maintaining the atomically isolated sites as single-atom centers under harsh electrocatalytic conditions remain urgent challenges. In this review, we summarized recent advances of SAECs in synthesis, characterization, oxygen reduction reaction (ORR) performance, and applications in ORR-related H2O2 production, metal-air batteries, and low-temperature fuel cells. Relevant progress on tailoring the coordination structure of isolated metal centers by doping other metals or ligands, enriching the concentration of single-atom sites by increasing metal loadings, and engineering the porosity and electronic structure of the support by optimizing the mass and electron transport are also reviewed. Moreover, general strategies to synthesize SAECs with high metal loadings on practical scale are highlighted, the deep learning algorithm for rational design of SAECs is introduced, and theoretical understanding of active-site structures of SAECs is discussed as well. Perspectives on future directions and remaining challenges of SAECs are presented.

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Electrochemical deposition as a universal route for fabricating single-atom catalysts

Cited by 350 publications

References 35 publications

Site-specific electrodeposition enables self-terminating growth of atomically dispersed metal catalysts

Site-specific electrodeposition enables self-terminating growth of atomically dispersed metal catalysts

Recent Progress in Single‐Atom Catalysts for Photocatalytic Water Splitting

Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction

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