Hierarchical porous N-doped carbon-supported PtCu nanoparticles as an efficient catalyst for oxygen reduction reaction

Di, Shuxian; Liu, Wenjin; Guo, Chen; Wang, Fanghui; Буланова, А. В.; Mebel, Alexander M.; Zhu, Hong

doi:10.1016/j.jpowsour.2022.231270

Cited by 9 publications

(11 citation statements)

References 64 publications

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“…As shown in Figure b, the lattice spacing is measured at about 0.222–0.224 nm. Compared with the crystal plane spacing of the pure Pt catalyst JM20 (0.232 nm), its crystal lattice shrinks, and it is closer to the (111) plane crystal spacing of the PtCu alloy of 0.2191 nm, which indicated the formation of the PtCu alloy.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Performance of a Cu@PtCu/CNF Oxygen Reduction Catalyst Membrane by Electrospinning

Deng

Lee

et al. 2022

ACS Omega

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A flexible carbon nanofiber film with high conductivity was prepared by electrospinning, and then Cu was uniformly deposited on the fiber film by pulse electrodeposition to prepare Cu nanocrystal/carbon nanofiber film. Cu@PtCu/carbon nanofiber (Cu@PtCu/CNF) catalytic films were synthesized by in-situ substitution reduction. The Cu@PtCu/CNF catalytic film solves the problem of uneven activity of the catalytic layer and can be directly used as the catalytic layer. The morphology and structure were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Electrochemical test results show that the Cu@PtCu/CNF catalytic films obtained at the chloroplatinic acid concentration of 0.5 mg·mL –1 (N2) exhibited 2.5 times specific activity when compared with commercial Pt/C catalysts. After 5000 cycles of stability test, the electrochemical surface areas (ECSAs) were still maintained at 80%, and the half-wave potential decreased by 11 mV, which was better than those of commercial Pt/C catalysts.

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Section: Resultsmentioning

confidence: 99%

Preparation and Performance of a Cu@PtCu/CNF Oxygen Reduction Catalyst Membrane by Electrospinning

Deng

Lee

et al. 2022

ACS Omega

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“…The results indicate that Cu affects the pore structure, which may be due to the formation of larger Cu nanoparticles . Under the microporous condition, the electrolyte cannot be in direct contact with the catalyst, reducing the real area involved in the electrochemical reaction . The incorporation of Cu increases the mesoporous structure, exposing more suitable pore sizes so that the catalyst has more opportunities to contact the electrolyte, decreasing mass transfer resistance and thus improving the reaction rate.…”

Section: Resultsmentioning

confidence: 99%

“…52 Under the microporous condition, the electrolyte cannot be in direct contact with the catalyst, reducing the real area involved in the electrochemical reaction. 53 The incorporation of Cu increases the mesoporous structure, exposing more suitable pore sizes so that the catalyst has more opportunities to contact the electrolyte, decreasing mass transfer resistance and thus improving the reaction rate. Moreover, metal nanoparticles can be better dispersed through mesoporous, which allows the exposure of more active sites.…”

Section: Synthesis Of Ptcuco/ncmentioning

confidence: 99%

“…Carbon defects are attributed to heteroatomic doping and can optimize the charge state of carbon materials, improve the surface adsorption/desorption behavior of intermediate products, and increase the active site density, thus improving the electrocatalytic performance. 16,53,56 To understand the surface chemical state of the PtCuCo/ NC catalyst, XPS tests were conducted and the corresponding spectra are shown in Figure 5. Figure 5b 5c).…”

Section: Synthesis Of Ptcuco/ncmentioning

confidence: 99%

“…Among them, PtCo/ NC formed Pt nanoparticles uniformly dispersed on the carrier due to the N-doped porous carbon structure obtained from the high-temperature calcination of Co-ZIF. 36 However, the electronegativity of the carrier is enhanced in PtCuCo/NC due to the increase of the N content caused by the introduction of Cu into the carrier and the interaction between Pt nanoparticles and the carrier makes Pt nanoparticles to be tightly anchored and evenly dispersed on the carrier, improving the Pt utilization 53 and greatly enhancing the catalytic effect of Pt; therefore, the ECSA increases accordingly. To further investigate the ORR performance, the linear sweep voltammetry (LSV) curves shown in Figure 6b were recorded in 0.1 M HClO 4 saturated with O 2 at a rotation of 1600 rpm and a scan rate of 10 mV s −1 .…”

Section: Electrochemical Testsmentioning

confidence: 99%

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Bimetallic ZIF-Based PtCuCo/NC Electrocatalyst Pt Supported with an N-Doped Porous Carbon for Oxygen Reduction Reaction in PEM Fuel Cells

Chen

Dai

et al. 2023

ACS Appl. Energy Mater.

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The research and synthesis of low-loading Pt-based catalysts with excellent catalytic performance and high stability are critical in achieving the commercial application of proton exchange membrane fuel cells. In this study, the Cu element is incorporated into a Co-based zeolitic imidazolate framework (ZIF) structure, and an N-doped low Pt-loading PtCuCo/NC alloy catalyst is synthesized using the impregnation reduction method with bimetallic CuCo-ZIF as a carrier. Incorporating a second metal Cu to Co-ZIF forms more metal-N bonds, increasing the N-doping content, and resulting in more structural defects. Meanwhile, the porous structure of ZIF can better disperse Pt/Pt alloy particles, which allows the generation and exposure of more oxygen reduction reaction active sites. PtCuCo/NC exhibits good catalytic activity (0.907 V) in electrochemical tests, with a high half-wave potential after 10,000 cycles and superior performance in single-cell tests. This study provides an idea for improving the performance of Pt-based fuel cell catalysts.

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Design of advanced aerogel structures for oxygen reduction reaction electrocatalysis

Peles-Strahl

Persky

Elbaz

2023

SusMat

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Oxygen reduction reaction (ORR) is considered the bottleneck reaction in fuel cells. Its sluggish kinetics requires the use of scarce and expensive platinum group metal (PGM) catalysts. Significant efforts have been invested in trying to find a PGM-free catalyst to replace Pt for this reaction or reduce its loadings.One interesting family of materials that has shown great promise in doing so is aerogels, which are based on covalent frameworks. The aerogels' high surface area and porosity enable good mass transport and high catalyst utilization that is expected to lower PGM loadings or replacing them completely. This review summarizes recent research in this field, introducing methods of using aerogels as cathodes for ORR, from carbon to metal aerogels. The catalytic sites vary from nanoparticles to atomically dispersed metal ions embedded in carbon aerogels that form all-in-one platform which can serve as both the support and the catalyst.

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Hierarchical porous N-doped carbon-supported PtCu nanoparticles as an efficient catalyst for oxygen reduction reaction

Cited by 9 publications

References 64 publications

Preparation and Performance of a Cu@PtCu/CNF Oxygen Reduction Catalyst Membrane by Electrospinning

Preparation and Performance of a Cu@PtCu/CNF Oxygen Reduction Catalyst Membrane by Electrospinning

Bimetallic ZIF-Based PtCuCo/NC Electrocatalyst Pt Supported with an N-Doped Porous Carbon for Oxygen Reduction Reaction in PEM Fuel Cells

Design of advanced aerogel structures for oxygen reduction reaction electrocatalysis

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