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Self‐assembled M–N‐doped carbon nanotube aerogels with single‐atom catalyst feature are for the first time reported through one‐step hydrothermal route and subsequent facile annealing treatment. By taking advantage of the porous nanostructures, 1D nanotubes as well as single‐atom catalyst feature, the resultant Fe–N‐doped carbon nanotube aerogels exhibit excellent oxygen reduction reaction electrocatalytic...
As one of the alternatives to replace precious metal catalysts, transition‐metal–nitrogen–carbon (M–N–C) electrocatalysts have attracted great research interest due to their low cost and good catalytic activities. Despite nanostructured M–N–C catalysts can achieve good electrochemical performances, they are vulnerable to aggregation and insufficient catalytic sites upon continuous catalytic reaction...
The oxygen reduction reaction (ORR) plays an important role in the fields of energy storage and conversion technologies, including metal–air batteries and fuel cells. The development of nonprecious metal electrocatalysts with both high ORR activity and durability to replace the currently used costly Pt‐based catalyst is critical and still a major challenge. Herein, a facile and scalable method is...
Bacterial infection caused by pathogenic bacteria has long been an intractable issue that threatens human health. Herein, the fact that nanocatalysts with single iron atoms anchored in nitrogen‐doped amorphous carbon (SAF NCs) can effectively induce peroxidase‐like activities in the presence of H2O2, generating abundant hydroxyl radicals for highly effective bacterial elimination (e.g., Escherichia coli...
Single‐atom catalysts (SACs) have attracted extensive attention in the catalysis field because of their remarkable catalytic activity, gratifying stability, excellent selectivity, and 100% atom utilization. With atomically dispersed metal active sites, Fe‐N‐C SACs can mimic oxidase by activating O2 into reactive oxygen species, O2−• radicals. Taking advantages of this property, single‐atom nanozymes...
Single‐atom Co catalyst Co‐Tpy‐C with well‐defined sites is synthesized by pyrolysis of a Co terpyridine (Tpy) organometallic complex. The Co‐Tpy‐C catalyst exhibits excellent activity for the electrochemical CO2 reduction reaction in aqueous electrolyte, with CO faradaic efficiency (FE) of over 95% from −0.7 to −1.0 V (vs RHE). By comparison, catalysts without Co or Tpy ligand added do not show any...
Among the bifunctional catalysts for water splitting, recently emerged transition‐metal single‐atom catalysts are theoretically considered to possess high potential, while the experimental activity is not satisfactory yet. Herein, an exceptionally efficient trifunctional metal–nitrogen–carbon (M–N–C) catalyst electrode, composed of a hierarchical carbon matrix embedding isolated nickel atoms with...
Developing efficient, inexpensive, and durable electrocatalysts for the oxygen reduction reaction (ORR) is important for the large‐scale commercialization of fuel cells and metal–air batteries. Herein, a hierarchically porous bimetallic Fe/Co single‐atom‐coordinated N‐doped carbon (Fe/Co‐Nx‐C) electrocatalyst for ORR is synthesized from Fe/Co‐coordinated polyporphyrin using silica template‐assisted...
Configuring metal single‐atom catalysts (SACs) with high electrocatalytic activity and stability is one efficient strategy in achieving the cost‐competitive catalyst for fuel cells’ applications. Herein, the atomic layer deposition (ALD) strategy for synthesis of Pt SACs on the metal–organic framework (MOF)‐derived N‐doped carbon (NC) is proposed. Through adjusting the ALD exposure time of the Pt...
Recently, single‐atom catalysts have aroused extensive attention in fields of clean energy and environmental protection due to their unique activity and efficient utilization of the active atoms. It is of great importance but still remains a great challenge to unveil the effect of single atoms on precise catalysis. Herein, it is reported that doping TiO2 hollow microspheres (TiO2‐HMSs) with single...
To deal with the ever‐growing toxic benzene‐derived compounds in the water system, extensive efforts have been dedicated for catalytic degradation of pollutants. However, the activities and efficiencies of the transition metal‐based nanoparticles or single‐atom sites are still ambiguous in Fenton‐like reactions. Herein, to compare the Fenton‐like catalytic efficiencies of the nanoparticles and single...
In article number 2006178, Baitao Li, Xiujun Wang, and co‐workers report a class of petal‐like Fe‐NC catalysts with an ultrathin porous nanosheet structure and proper hydrophilicity/hydrophobicity. This structure improves the exposure of inaccessible Fe‐N4 active sites and enhances oxygen diffusion, ensuring fast mass transport for oxygen reduction reaction. This article presents a unique perspective...
Nitrogen‐coordinated single‐atom catalysts (SACs) have emerged as a new frontier for accelerating oxygen reduction reaction (ORR) owing to the optimal atom efficiency and fascinating properties. However, augmenting the full exposure of active sites is a crucial challenge in terms of simultaneously pursuing high metal loading of SACs. Here, petal‐like porous carbon nanosheets with densely accessible...
Single‐atom catalysts (SACs) have attracted significant attention due to their superior catalytic activity and selectivity. However, the nature of active sites of SACs under realistic reaction conditions is ambiguous. In this work, high loading Pt single atoms on graphitic carbon nitride (g‐C3N4)‐derived N‐doped carbon nanosheets (Pt1/NCNS) is achieved through atomic layer deposition. Operando X‐ray...
The development of novel single atom catalyst (SAC) is highly desirable in organic synthesis to achieve the maximized atomic efficiency. Here, a Co‐based SAC on nitrogen‐doped graphene (SACo@NG) with high Co content of 4.1 wt% is reported. Various characterization results suggest that the monodispersed Co atoms are coordinated with N atoms to form robust and highly effective catalytic centers to activate...
Recently, single‐atom catalysts (SACs) have been receiving increasing attention in various catalytic fields, and meanwhile, emerging nanocatalytic medicine provides a novel tumor chemotherapy modality without using toxic chemodrugs. The distinct properties of SACs, such as well‐defined and precisely located metal centers, identical coordination environment, tailorable composition and structure, and...
A heterogeneous catalyst is a backbone of modern sustainable green industries; and understanding the relationship between its structure and properties is the key for its advancement. Recently, many upscaling synthesis strategies for the development of a variety of respectable control atomically precise heterogeneous catalysts are reported and explored for various important applications in catalysis...
Electrocatalytic reduction of carbon dioxide to valuable chemicals is a sustainable technology that can achieve a carbon‐neutral energy cycle in the environment. Electrochemical CO2 reduction reaction (CO2RR) processes using metal–organic frameworks (MOFs), featuring atomically dispersed active sites, large surface area, high porosity, controllable morphology, and remarkable tunability, have attracted...
Single‐atom catalysts (SACs) have received tremendous attention due to their extraordinary catalytic performances. The synthesis of this kind of catalysts is highly desired and challenging. In the last few years, metal–organic frameworks (MOFs) have been demonstrated as a promising precursor for fabricating SACs. In this review, the progress and recent advances in the synthesis of MOF‐derived SACs...
Single‐atom catalysts (SACs) with specific coordination environment are expected to be efficient electrocatalysts for oxygen reduction reaction (ORR). Herein, NiN4C10 coordination site is constructed through encapsulating Ni2+ into the cavity of ZIF‐8 as a self‐sacrificing precursor and anchoring it on 3D N‐doped carbon frameworks. The NiN4C10 catalyst shows excellent ORR activity and stability,...
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