Improving catalytic performance relies heavily on the rational design of the spatial structure of electrocatalysts, achieved through exposure of active sites, acceleration of the charge/mass transfer rate, and confinement of the reactants. In this study, we have fabricated Co nanoparticles embedded in overhang eave-like hollow N-doped mesoporous carbon (Co@EMPC) by adjusting the thickness of mesoporous polydopamine (mPDA). Thanks to the abundance of short mesoporous channels within the porous structure and the tuned electronic properties resulting from heterojunction structures between metal and carbon, the prepared Co@EMPC provides increased accessibility to active sites and enhanced mass and charge transfer rates. These features contribute to superior performance in the oxygen reduction reaction (ORR), with a half-wave potential of 0.874 V vs RHE, as well as exceptional durability in alkaline media. This study introduces a useful approach to enhance the ORR using eave-like hollow nanoreactors.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acsnano.3c07375 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
ControllableSynthesis of Heterogeneous ZnS/SnS2 Encapsulated in Hollow Nitrogen-doped Carbon Microcubes as Anode for High-performance Li-ion Capacitors.
Chem Asian J
January 2025
East China University of Science and Technology, School of Materials Science and Engineering, 130# Meilong Road, Shanghai, 200237, Shanghai, CHINA.
Li-ion capacitors (LICs) integrate the desirable features of lithium-ion batteries (LIBs) and supercapacitors (SCs), but the kinetic imbalance between the both electrodes leads to inferior electrochemical performance. Thus, constructing an advanced anode with outstanding rate capability and terrific redox kinetics is crucial to LICs. Herein, heterostructured ZnS/SnS2 nanosheets encapsulated into N-doped carbon microcubes (ZnS/SnS2@NC) are successfully fabricated.
View Article and Find Full Text PDFMOF-Derived Hollow C, N-Doped CoO Dodecahedral Nanostructure Enwrapped with MgInS Nanosheets for Enhanced Photocatalytic N Reduction.
Inorg Chem
January 2025
Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India.
Design of hierarchical hollow nanoheterostructure materials through interfacial and defect engineering is an innovative approach for achieving optimal charge separation dynamics and photon harvesting efficiency. Herein, we have described a facile technique to fabricate hollow MOF-derived C, N-doped-CoO (C, N-CoO) dodecahedral particles enwrapped with MgInS nanosheets for enhanced N reduction performance. ZIF-67 was initially used as a sacrificial template to prepare hollow C, N-CoO using a carbonization route followed by low-temperature calcination treatment.
View Article and Find Full Text PDFCobalt nanoparticles decorated hollow N-doped carbon nanospindles enable high-performance lithium-oxygen batteries.
J Colloid Interface Sci
December 2024
Key Laboratory of Eco-chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China. Electronic address:
Despite the ultrahigh theoretical energy density and cost-effectiveness, aprotic lithium-oxygen (Li-O) batteries suffer from slow oxygen redox kinetics at cathodes and large voltage hysteresis. Here, we well-design ultrafine Co nanoparticles supported by N-doped mesoporous hollow carbon nanospindles (Co@HCNs) to serve as efficient electrocatalysts for Li-O battery. Benefiting from strong metal-support interactions, the obtained Co@HCNs manifest high affinity for the LiO intermediate, promoting formation of ultrathin nanosheet-like LiO with low-impedance contact interface on the Co@HCNs cathode surface, which facilitates the reversible decomposition upon charging.
View Article and Find Full Text PDFThree-in-one strategy via anchored MoSe for construct stable conversion-type Na-Se batteries: Chemisorption, catalytic conversion and stress dispersion.
J Colloid Interface Sci
December 2024
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China. Electronic address:
Conversion-type selenium cathodes are considered a highly promising alternative to sulfur cathodes due to their high conductivity and similar theoretical capacity. However, stress-diffusion and shuttle effects during the conversion process remain significant challenges that urgently need to be addressed. Herein, a composite matrix of MoSe anchored on the surface of N-doped hollow mesoporous carbon nanospheres (NHMCNS) was designed as a Se host to construct Se/C cathodes (Se/MoSe@NHMCNS).
View Article and Find Full Text PDFOrbital Coupling of Dual-Atom Sites Boosts Electrocatalytic NO Oxidation and Dynamic Intracellular Response.
Adv Mater
December 2024
School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China.
In situ measurement of nitric oxide (NO) in living tissue and single cells is highly important for achieving a profound comprehension of cellular functionalities and facilitating the precise diagnosis of critical diseases; however, the progress is greatly hindered by the weak affinity of ultratrace concentration NO in cellular environment toward electrocatalysts. Herein, a new strategy is reported for precisely constructing orbital coupled dual-atomic sites to enhance the affinity between the metal atomic sites and NO on a class of N-doped hollow carbon matrix dual-atomic sites Co─Ni (CoNi-NC) for greatly boosting electrocatalytic NO performance. The as-synthesized CoNi-NC demonstrates a substantially higher current density than Ni-NC and Co-NC, coupled with exceptional stability with a negligible degradation rate of 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!