One-pot synthesis of Cu@porous nitrogen–doped carbon (Cu@PNC) for high-efficiency electromagnetic wave absorption

Zhu, Xiaoyu; Qiu, Hai; Chen, Ping

doi:10.1016/j.jallcom.2022.164620

Cited by 10 publications

(2 citation statements)

References 94 publications

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“…The sample of CuNSC-3 possesses more pores from 7 to 25 nm than other samples, proving the largest specific surface area of CuNSC-3. Abundant pores endow CuNSC-3 with a larger specific surface area, increasing the active sites of catalysts and promoting the efficient transfer of electrons, and finally better electrochemical performances. , …”

Section: Resultsmentioning

confidence: 99%

“…Abundant pores endow CuNSC-3 with a larger specific surface area, increasing the active sites of catalysts and promoting the efficient transfer of electrons, and finally better electrochemical performances. 17,28 Furthermore, XPS spectra were also adopted to confirm the surface composition and chemical states with the bonding configurations of the various elements. The survey spectra of CuNSC-x (x = 0, 1, 3, and 5) catalysts shown in Figure S3 indicate that CuNSC-1, CuNSC-3, and CuNSC-5 catalysts synthesized with the addition of CuCl 2 are all composed of Cu, O, N, S, and C elements.…”

Section: Resultsmentioning

confidence: 99%

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Atomically Dispersed Cu Nanostructures with pH-Universal Electrocatalytic Oxygen Reduction Activity for Zn–Air Batteries

Zhang,

Dong,

et al. 2023

ACS Appl. Nano Mater.

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Constructing efficient and cost-effective oxygen reduction reaction (ORR) electrocatalysts in wide pH ranges is important for renewable energy storage and conversion devices. As prospective alternatives to commercial Pt/C electrocatalysts, transition-metal (TM) single-atom catalysts (SACs) delivered limited catalytic activity and stability in a wide pH range, especially in acidic and neutral electrolytes. Herein, we demonstrate a general synthesis strategy for preparation of TM SACs via the MgO template-assisted pyrolysis process. The as-prepared atomically dispersed Cu embedded in a 3D porous N,S-doped carbon nanostructure catalyst (CuNSC-3) displays superior ORR activity in wide pH electrolytes due to its unique structure feature of hierarchical porosity for enriched CuN 4 S 2 center active sites. CuNSC-3 delivers small potentials (E j3 ) of 0.87, 0.42, and 0.52 V at a current density of −3 mA cm −2 in 0.1 M KOH, 0.5 M H 2 SO 4 , and 0.1 M PBS solutions, respectively. Furthermore, the Zn−air battery using CuNSC-3 as air cathodes achieves a power density of 225 mW cm −2 and an energy density of 973.5 Wh kg Zn −1 , implying its promising application in real energy-related devices. The CuNSC-3 electrocatalysts can pave the way for the development of next-generation Cu-based ORR cathode electrocatalysts in a wide pH range as well as give guidance for diverse clean fuels of practical significance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%