Fully ordered L10-PtCoAu electrocatalyst derived from PtAu@CoO precursor with enhanced performance for oxygen reduction reaction

Cao, Jidong; Cao, Hehuan; Wang, Fanghui

doi:10.1016/j.electacta.2021.138266

Cited by 17 publications

(16 citation statements)

References 50 publications

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“…As shown in Figure f, there are two peaks of 4f 7/2 and 4f 5/2 of Pt in the Pt 4f region, and each peak can be deconvoluted into two peaks, belonging to Pt(0) and Pt(II), respectively. Compared with Pt/C, the Pt 4f peaks of PtCo/NC and PtCuCo/NC are negatively shifted, which further confirmed the formation of alloy structure, and both alloy structure and N doping affected the electronic properties of Pt . The lattice shrinkage caused by the alloy structure makes the d band center of Pt move downward, weakens the oxygen binding energy, releases the Pt active sites in the catalytic reaction process, and thus improves the ORR catalytic efficiency .…”

Section: Resultsmentioning

confidence: 74%

“…Compared with Pt/C, the Pt 4f peaks of PtCo/NC and PtCuCo/NC are negatively shifted, which further confirmed the formation of alloy structure, and both alloy structure and N doping affected the electronic properties of Pt. 59 The lattice shrinkage caused by the alloy structure makes the d band center of Pt move downward, weakens the oxygen binding energy, releases the Pt active sites in the catalytic reaction process, and thus improves the ORR catalytic efficiency. 60 Compared with PtCo/NC, the Co 2p and N 1s characteristic peaks of PtCuCo/NC shift in the direction of high energy (Figures S3 and S4), indicating that N interacts more with Pt and provides electrons to Pt in PtCuCo/NC.…”

Section: Synthesis Of Ptcuco/ncmentioning

confidence: 99%

“…As aforementioned, the PtCuCo/NC catalyst showed a higher half-wave potential and a lower Tafel slope, indicating its higher ORR efficiency. 59 The excellent performance of PtCuCo/NC may be due to the incorporation of Cu, which increases the N content, whereas the N doping into the C structure forms an N-doped porous carbon structure, which makes the interfacial charge transfer easier, promoting the adsorption and desorption of O 2 . In addition, the high specific surface area and pore volume of PtCuCo/NC can cause the catalyst to have more contact with the electrolyte, enhance the rate of mass transfer, and subsequently improve the electrocatalytic performance.…”

Section: Electrochemical Testsmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Resultsmentioning

confidence: 74%

Section: Synthesis Of Ptcuco/ncmentioning

confidence: 99%

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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“…In the common annealing methods, low temperature is often not conducive to the formation of ordered structures, but will cause sintering. ( Jung et al, 2020 ; Cao et al, 2021 ) At the same time, a suitable calcination temperature may also lead to the formation of core-shell structures. In addition, such core-shell structures are generally oxides of transition metals.…”

Section: Ordered Pt-based Intermetallic Compoundsmentioning

confidence: 99%

Ordered intermetallic compounds combining precious metals and transition metals for electrocatalysis

Ming

Wan²,

Yan³

2022

Front. Chem.

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Ordered intermetallic alloys with significantly improved activity and stability have attracted extensive attention as advanced electrocatalysts for reactions in polymer electrolyte membrane fuel cells (PEMFCs). Here, recent advances in tuning intermetallic Pt- and Pd-based nanocrystals with tunable morphology and structure in PEMFCs to catalyze the cathodic reduction of oxygen and the anodic oxidation of fuels are highlighted. The fabrication/tuning of ordered noble metal-transition metal-bonded intermetallic PtM and PdM (M = Fe, Co) nanocrystals by using high temperature annealing treatments to promote the activity and stability of electrocatalytic reactions are discussed. Furthermore, the further improvement of the efficiency of this unique ordered intermetallic alloys for electrocatalysis are also proposed and discussed. This report aims to demonstrate the potential of the ordered intermetallic strategy of noble and transition metals to facilitate electrocatalysis and facilitate more research efforts in this field.

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“…Since the successful synthesis of monodisperse Pt-Fe intermetallic nanocrystals by Sun's group in 2000, more and more attention has been paid to the synthesis of ordered nanocrystals [30,31]. There are quite a few recent studies for Pt-based intermetallic NPs for fuel cells [32][33][34][35][36].…”

Section: Synthesis Of Pt-based Intermetallic Nanocrystalsmentioning

confidence: 99%

Pt-Based Intermetallic Nanocrystals in Cathode Catalysts for Proton Exchange Membrane Fuel Cells: From Precise Synthesis to Oxygen Reduction Reaction Strategy

Gao

Chen

et al. 2021

Catalysts

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Although oxygen reduction reaction (ORR) catalysts have been extensively investigated and developed, there is a lack of clarity on catalysts that can balance high performance and low cost. Pt-based intermetallic nanocrystals are of special interest in the commercialization of proton exchange membrane fuel cells (PEMFCs) due to their excellent ORR activity and stability. This review summarizes the wide range of applications of Pt-based intermetallic nanocrystals in cathode catalysts for PEMFCs and their unique advantages in the field of ORR. Firstly, we introduce the fundamental understanding of Pt-based intermetallic nanocrystals, and highlight the difficulties and countermeasures in their synthesis. Then, the progress of theoretical and experimental studies related to the ORR activity and stability of Pt-based intermetallic nanocrystals in recent years are reviewed, especially the integrated strategies for enhancing the stability of ORR. Finally, the challenges faced by Pt-based intermetallic nanocrystals are summarized and future research directions are proposed. In addition, numerous design ideas of Pt-based intermetallic nanocrystals as ORR catalysts are summarized, aiming to promote further development of commercialization of PEMFC catalysts while fully understanding Pt-based intermetallic nanocrystals.

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Fully ordered L10-PtCoAu electrocatalyst derived from PtAu@CoO precursor with enhanced performance for oxygen reduction reaction

Cited by 17 publications

References 50 publications

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

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

Ordered intermetallic compounds combining precious metals and transition metals for electrocatalysis

Pt-Based Intermetallic Nanocrystals in Cathode Catalysts for Proton Exchange Membrane Fuel Cells: From Precise Synthesis to Oxygen Reduction Reaction Strategy

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