Single-Atom Catalysis: Far beyond the Matter of Metal Dispersion

Zhang, Tao

doi:10.1021/acs.nanolett.1c02681

Cited by 46 publications

(28 citation statements)

References 38 publications

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“…As an important platinum-group metal-free (PGM electrocatalyst, the well-established planar Fe-N4 model has provided kinetic insig its excellent HER features. However, this assumption requires more than two N at chelate with one Fe atom and obviously mismatches with our XPS survey results o ratio of N/Fe (0.15) [27,28]. Therefore, heteroatom-doped Fe3O4 should be a reas component for uncovering the impressive HER performance of our Fe3O4/CNS ca In the pursuit of unraveling the real catalytic configurations towards the HER of the Fe 3 O 4 /CNS catalysts, two possible water molecule dissociation mechanisms were discussed on the ground of the reported possible catalytic sites.…”

Section: R Peercontrasting

confidence: 70%

“…As an important platinum-group metal-free (PGM-free) electrocatalyst, the well-established planar Fe-N 4 model has provided kinetic insight into its excellent HER features. However, this assumption requires more than two N atoms to chelate with one Fe atom and obviously mismatches with our XPS survey results of a low ratio of N/Fe (0.15) [27,28]. Therefore, heteroatom-doped Fe 3 O 4 should be a reasonable component for uncovering the impressive HER performance of our Fe 3 O 4 /CNS catalysts.…”

Section: R Peermentioning

confidence: 68%

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Laser Shock Fabrication of Nitrogen Doped Inverse Spinel Fe3O4/Carbon Nanosheet Film Electrodes towards Hydrogen Evolution Reactions in Alkaline Media

Zhao

Cheng

et al. 2022

IJMS

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The reliable and cost-effective production of high-performance film electrodes for hydrogen evolution reactions remains a challenge for the laser surface modification community. In this study, prior to a thermal imidization reaction, a small number of Fe3O4 nanoparticles were vortexed into a poly(amic acid) (PAA) prepolymer, and the achieved flat composite film was then ablated by a 1064 nm fiber laser. After laser irradiation, the hierarchical architectures of carbon nanosheets decorated with Fe3O4 nanoparticles were generated. Although pure polyimide (PI) film and laser carbonized PI film, as well as bare Fe3O4, showcase poor intrinsic catalytic activity toward alkaline hydrogen evolution reactions, our laser-derived Fe3O4/carbon nanosheet hybrid film demonstrated enhanced electrocatalytic activity and stability in 1 M KOH electrolyte; the overpotential(η10) reached 247 mV when the current density was 10 mA cm−2 with a slight current decay in the chronoamperometric examination of 12 h. Finally, we proposed that the substitution of N to O in Fe−O sites of trans spinel structured magnetite would be able to modulate the free energy of hydrogen adsorption (ΔGH*) and accelerate water dissociation.

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Section: R Peercontrasting

confidence: 70%

Section: R Peermentioning

confidence: 68%

Laser Shock Fabrication of Nitrogen Doped Inverse Spinel Fe3O4/Carbon Nanosheet Film Electrodes towards Hydrogen Evolution Reactions in Alkaline Media

Zhao

Cheng

et al. 2022

IJMS

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“…[ 4 ] Single‐atom catalysts (SACs) are considered to have the maximized atomic utilization efficiency due to the isolation properties of metal atoms and other characteristics, such as the unique metal atom‐support interfacial interaction, the potential of bridging homogeneous and heterogeneous catalysis, and the possibility of narrowing the gap between theoretical and experimental catalysis. [ 5 ] Since then, the theme of “single‐atom catalysis” has entered a very rapid development stage, [ 6 ] and the recently newly “dual‐atom catalysts” [ 7 ] and customized “atomic cluster catalysts” [ 8 ] have been further proposed. We are witnessing the paradigm shift and scientific progress in the field of heterogeneous catalysis based on the concept of single atom or atomically dispersed catalysis.…”

Section: Introductionmentioning

confidence: 99%

Emerging Ultrahigh‐Density Single‐Atom Catalysts for Versatile Heterogeneous Catalysis Applications: Redefinition, Recent Progress, and Challenges

Liao

et al. 2022

Small Structures

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In recent years, single‐atom catalysts (SACs) with high metal loading have emerged in different heterogeneous catalysis fields and shown extraordinary catalytic properties. When there are enough coordination atoms (or functional groups) on the supports, it is possible to achieve a limit monolayer atom loading on the surface of supports with ultrahigh atom density (5–15 atoms nm−2) and extremely close site distance (0.2–0.5 nm), by using appropriate synthesis methods and procedures. These high‐density metal atoms usually have no or less metal bonds, which are mostly isolated by support atoms to form 3D foam‐like atomic constructions. Herein, a new notion of metal atomic foam catalysts (AFCs) is propsed to redefine these ultrahigh‐density SACs accommodated by specific supports. This new paradigm of 3D atomic construction for SACs has potential significance for both theoretical research and industrial applications. The latest major advancements in the controllable synthesis of AFCs on various supports (e.g., polymer, carbon, and metallic compound) via different methods (bottom‐up or top‐down approaches) are summarized. The latent catalytic principles and typical application cases of AFCs are emphasized in a wide range of heterogeneous catalysis fields (e.g., thermocatalysis, photocatalysis, electrocatalysis, etc.). The challenges and prospects of this newly 3D ultrahigh‐density AFCs materials in practical industrial application are pointed out as well.

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“…18 Nowhere is this concept better illustrated than in the preclinical studies that have shown that the complex active centers of common nanocatalysts might bring a great deal of damage in the catalytic selectivity for biochemical reactions of interest. 19 As a general consensus, it is very difficult for any nanocatalyst to distinguish target neurochemicals from interference in the complex neurological environment. 20 Single-atom electrocatalysis was developed more recently, benefiting from the innovation of single-atom technology, and can enable the rapid and specific monitoring of microdialysate glucose in the central nervous system.…”

Section: Introductionmentioning

confidence: 99%