Structurally Ordered PtNi Intermetallic Nanoparticles as Efficient and Stable Cathode Catalysts for Proton Exchange Membrane Fuel Cells

Li, Lubing; Zhang, Lei; Zhai, Tianyu; Yang, Sheng; Wang, Weiding; Zhou, Di; Su, Jinzhan; Guo, Liejin

doi:10.1002/chem.202300099

Cited by 7 publications

(1 citation statement)

References 36 publications

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“…Metal ions are directly impregnated on the carrier and then reduced in reducing atmosphere, which can not only effectively reduce metal ions but also promote the orderly diffusion of metal atoms in high-temperature environment, thus realizing the direct preparation of intermetallics. − This strategy features the advantages of simple operation, as well as the controlled yield, which can be achieved by adjusting the impregnation concentration of metal salts. Therefore, it is very suitable for the large-scale preparation of intermetallics.…”

Section: Synthetic Strategies Of Intermetallicsmentioning

confidence: 99%

Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis

Lin,

Li,

Zeng

et al. 2023

Chem. Rev.

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Electrocatalysis underpins the renewable electrochemical conversions for sustainability, which further replies on metallic nanocrystals as vital electrocatalysts. Intermetallic nanocrystals have been known to show distinct properties compared to their disordered counterparts, and been long explored for functional improvements. Tremendous progresses have been made in the past few years, with notable trend of more precise engineering down to an atomic level and the investigation transferring into more practical membrane electrode assembly (MEA), which motivates this timely review. After addressing the basic thermodynamic and kinetic fundamentals, we discuss classic and latest synthetic strategies that enable not only the formation of intermetallic phase but also the rational control of other catalysis-determinant structural parameters, such as size and morphology. We also demonstrate the emerging intermetallic nanomaterials for potentially further advancement in energy electrocatalysis. Then, we discuss the state-of-the-art characterizations and representative intermetallic electrocatalysts with emphasis on oxygen reduction reaction evaluated in a MEA setup. We summarize this review by laying out existing challenges and offering perspective on future research directions toward practicing intermetallic electrocatalysts for energy conversions.

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Section: Synthetic Strategies Of Intermetallicsmentioning

confidence: 99%

Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis

Lin,

Li,

Zeng

et al. 2023

Chem. Rev.

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Facile Synthesis of Multifunctional Ni(OH)₂‐Supported Core‐Shell Ni@Pd Nanocomposites for the Electro‐Oxidation of Small Organic Molecules

Wu,

Zhou,

Zhang

et al. 2023

Chemistry A European J

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In the domain of proton exchange membrane fuel cells (PEMFCs), the development of efficient and durable catalysts for the electro‐oxidation of small organic molecules, especially of alcohols (methanol, ethanol, ethylene glycol, et al.) has always been a hot topic. A large number of related electrocatalysts with splendid performance have been designed and synthesized till now, while the preparation processes of most of them are demanding on experimental operations and conditions. Herein, we put forward a facile and handy method for the preparation of multifunctional Ni(OH)2‐supported core‐shell Ni@Pd nanocomposites (Ni(OH)2/Ni@Pd NCs) with the assistance of galvanic replacement reaction (GRR) at room temperature and ambient pressure. As expected, the Ni(OH)2 substrate can prevent the aggregation of core‐shell (CS) Ni@Pd nanoparticles (NPs) and inhibit the formation of COads and further prevent Pd from being poisoned. The synergistic effect between CS Ni@Pd NPs and Ni(OH)2 substrate and the electronic effect between Pd shell and Ni core contribute to the outstanding electrocatalytic performance for methanol, ethanol, and ethylene glycol oxidation in alkaline condition. This study provides a succinct method for the design and preparation of efficient Pd‐based electrocatalysts for alcohol electro‐oxidation.

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Seed‐Mediated Synthesis of High Loading PtCo Intermetallic Compounds Enhanced Catalytic Efficacy and Long‐Term Stability for Oxygen Reduction Reaction

Cai,

Yang,

Liu

et al. 2024

ChemPlusChem

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Atomically ordered intermetallic Pt‐based nanoparticles, recognized as advanced electrocatalysts, exhibit superior activity for the oxygen reduction reaction (ORR) in fuel cell cathodes. Nevertheless, the formation of these ordered structures typically necessitates elevated annealing temperatures, which can accelerate particle growth and diminished reactivity. In this study, we synthesized carbon‐supported platinum‐cobalt intermetallic compounds (PtCo‐IMCs) with sub‐4 nm particle sizes and uniform distribution. These catalysts, characterized by high platinum content and exceptional ORR activity, are specifically tailored for heavy‐duty vehicle (HDV) applications. The PtCo‐IMCs exhibited significantly enhanced catalytic performance and durability compared to conventional Pt‐based catalysts, utilizing platinum nanoparticles as nucleation sites to promote growth. This method effectively retained smaller particle sizes while achieving a higher degree of ordering and alloying during high‐temperature annealing. Optimization of the annealing temperature resulted in peak activity and stability at 800 °C. The mass activity (MA) of the PtCo‐800 catalyst was 2.7‐fold and 1.8‐fold that of the commercial Pt/C and disordered PtCo catalysts, respectively. Additionally, the single cell employing the PtCo‐800 catalyst showed a minimal voltage loss of only 27 mV at a current density of 2 A cm‐2 after 30,000 cycles of the accelerated durability test (ADT), underscoring its long‐term stability.

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Structurally Ordered PtNi Intermetallic Nanoparticles as Efficient and Stable Cathode Catalysts for Proton Exchange Membrane Fuel Cells

Cited by 7 publications

References 36 publications

Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis

Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis

Facile Synthesis of Multifunctional Ni(OH)₂‐Supported Core‐Shell Ni@Pd Nanocomposites for the Electro‐Oxidation of Small Organic Molecules

Seed‐Mediated Synthesis of High Loading PtCo Intermetallic Compounds Enhanced Catalytic Efficacy and Long‐Term Stability for Oxygen Reduction Reaction

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Structurally Ordered PtNi Intermetallic Nanoparticles as Efficient and Stable Cathode Catalysts for Proton Exchange Membrane Fuel Cells

Cited by 7 publications

References 36 publications

Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis

Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis

Facile Synthesis of Multifunctional Ni(OH)2‐Supported Core‐Shell Ni@Pd Nanocomposites for the Electro‐Oxidation of Small Organic Molecules

Seed‐Mediated Synthesis of High Loading PtCo Intermetallic Compounds Enhanced Catalytic Efficacy and Long‐Term Stability for Oxygen Reduction Reaction

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Product

Resources

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Facile Synthesis of Multifunctional Ni(OH)₂‐Supported Core‐Shell Ni@Pd Nanocomposites for the Electro‐Oxidation of Small Organic Molecules