Rapid synthesis of hollow PtPdCu trimetallic octahedrons at room temperature for oxygen reduction reactions in acid media

Zhao, Ruopeng; Chen, Zhijing; Huang, Shaoming

doi:10.1039/c9ce01422e

Cited by 13 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[128] Besides, precious metals, such as Au and Pd in particular, have provided improved catalytic activity and stability to Pt-based ternary systems. Examples include various Pd-, Au-, and AuPd-based ternary compositions: PtPdRu, [129][130][131] PtPdCu, [132][133][134][135][136][137][138][139][140] PtPdRh, [141] PtCuAu, [142] PtPdNi, [143,144] PtPdAu, [145,146] PtPdAg, [147,148] PtCoAu, [149] and PtNiAu. [150,151] Yu and coworkers, in particular, have shown the excellent stability of PtPdCu nanostructures.…”

Section: Ternary Random Alloysmentioning

confidence: 99%

Highly Stable Pt‐Based Ternary Systems for Oxygen Reduction Reaction in Acidic Electrolytes

Kim

Hong

Lee

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

electrolytes, have received considerable attention. PAFCs are best suited for stationary power with combined heat and power, and have high overall efficiency and long system lifetimes, while PEMFCs are typically used in automobiles and portable electronics because of their compact size, light weight, high power density, and low operating temperature. [5,6] However, critical components in both PAFCs and PEMFCs, including electrodes, membranes, and catalysts, are still being intensively developed to resolve serious issues in performance, cost, and durability. The latest development plan for fuel cells from the U.S. Department of Energy suggests that more durable and stable catalysts for PAFCs will be necessary to ensure prolonged operation with less cost. [7] Also, the durability and cost of PEMFCs must be improved for commercialization in lightduty vehicles (Figure 1a). This is due in part to costly Pt catalysts, which comprise a significant fraction of the total production cost of PEMFCs (Figure 1b). [8] Overall, more highly efficient and robust Pt-based catalysts are essential to ensure wider use of clean and sustainable hydrogen fuel cell systems.

show abstract

Section: Ternary Random Alloysmentioning

confidence: 99%

Highly Stable Pt‐Based Ternary Systems for Oxygen Reduction Reaction in Acidic Electrolytes

Kim

Hong

Lee

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…To overcome the energy shortages and environmental pollution, extensive research has focused on proton exchange membrane fuel cells and rechargeable metal–air batteries. − The oxygen reduction reaction (ORR) as a key part of the above energy technologies limits their overall power performance owing to its intrinsically sluggish kinetics. , Platinum (Pt)-group noble metals are considered to be the best ORR electrocatalysts for their four-electron reduction of oxygen, , but their high cost, low abundance, poor durability, and poisoning by CO/methanol hinder their commercial applications. − Therefore, design of new and effective electrocatalysts composed of transition-metal elements is pivotal for highly efficient ORR …”

Section: Introductionmentioning

confidence: 99%

Atomically Dispersed CoN₄/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries

Zhao

Chen

et al. 2020

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Minimizing the particle size of transition metals and constructing heteroatom-co-doped carbon with a high surface area are deemed imperative in maximizing the atomic utilization of carbon-based materials. Herein, the atomically dispersed Co sites anchored on interconnected B, N-doped carbon nanotubes (B, N, Co/C nanotubes) are prepared through facile molten-salt-assisted pyrolysis of B/N/Co precursors following chemical etching. The Co single atom is demonstrated to form a Co–N4 planar configuration by XAFS analysis. The developed B, N, Co/C nanotubes exhibit excellent oxygen reduction reaction (ORR) performance in alkaline medium. They not only display a positive half-wave potential (E 1/2, 0.87 V), surpassing that of commercial Pt/C (0.84 V), but also show an outstanding stability (only 1 mV degrade can be observed after 10,000 cycles) and a high fuel selectivity. These excellent ORR performances derive from the efficient synergy of atomically dispersed Co active sites, unique 3D tubelike assembly structure, large specific surface area, and high graphitization degree. Moreover, the B, N, Co/C nanotubes assisted by RuO2 as an air cathode can enable rechargeable Zn–air batteries with larger power density (125.0 mW cm–2), higher specific capacity (746.8 mA h gZn –1), and better cycling stability than those of conventional Pt/C + RuO2-based Zn–air batteries.

show abstract

“…The electrocatalytic properties of bi- or multi-metallic Pt-containing alloys reflect combinations of the features of individual metal components, as well as the possible synergistic interactions between them [ 66 ]. The improved catalytic activities, relative to those characteristic of the bare (pure) Pt metal, have been demonstrated using the combination of Pt with different metals, such as Pd, Au, Ag, Ni, Co, Cu, and Fe [ 4 , 6 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 ]. The observed enhanced electrocatalytic activities have been attributed to geometric (decrease in the Pt–Pt bond distances) and electronic (increase in the d-electron vacancy in Pt) factors, in addition to the interfacial structural changes affecting the adsorption (O 2 -molecule-activation) properties [ 76 , 77 , 78 ].…”

Section: Alloyed Pt Nanostructuresmentioning

confidence: 99%

Enhancement of Activity and Development of Low Pt Content Electrocatalysts for Oxygen Reduction Reaction in Acid Media

et al. 2021

View full text Add to dashboard Cite

Platinum is a main catalyst for the electroreduction of oxygen, a reaction of primary importance to the technology of low-temperature fuel cells. Due to the high cost of platinum, there is a need to significantly lower its loadings at interfaces. However, then O2-reduction often proceeds at a less positive potential, and produces higher amounts of undesirable H2O2-intermediate. Hybrid supports, which utilize metal oxides (e.g., CeO2, WO3, Ta2O5, Nb2O5, and ZrO2), stabilize Pt and carbon nanostructures and diminish their corrosion while exhibiting high activity toward the four-electron (most efficient) reduction in oxygen. Porosity of carbon supports facilitates dispersion and stability of Pt nanoparticles. Alternatively, the Pt-based bi- and multi-metallic catalysts, including PtM alloys or M-core/Pt-shell nanostructures, where M stands for certain transition metals (e.g., Au, Co, Cu, Ni, and Fe), can be considered. The catalytic efficiency depends on geometric (decrease in Pt–Pt bond distances) and electronic (increase in d-electron vacancy in Pt) factors, in addition to possible metal–support interactions and interfacial structural changes affecting adsorption and activation of O2-molecules. Despite the stabilization of carbons, doping with heteroatoms, such as sulfur, nitrogen, phosphorus, and boron results in the formation of catalytically active centers. Thus, the useful catalysts are likely to be multi-component and multi-functional.

show abstract

Rapid synthesis of hollow PtPdCu trimetallic octahedrons at room temperature for oxygen reduction reactions in acid media

Abstract: Hollow PtPdCu trimetallic octahedrons were prepared under mild conditions, exhibiting enhanced activity toward the oxygen reduction reaction in acid media.

Cited by 13 publications

References 38 publications

Highly Stable Pt‐Based Ternary Systems for Oxygen Reduction Reaction in Acidic Electrolytes

Highly Stable Pt‐Based Ternary Systems for Oxygen Reduction Reaction in Acidic Electrolytes

Atomically Dispersed CoN₄/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries

Enhancement of Activity and Development of Low Pt Content Electrocatalysts for Oxygen Reduction Reaction in Acid Media

Contact Info

Product

Resources

About

Rapid synthesis of hollow PtPdCu trimetallic octahedrons at room temperature for oxygen reduction reactions in acid media

Abstract: Hollow PtPdCu trimetallic octahedrons were prepared under mild conditions, exhibiting enhanced activity toward the oxygen reduction reaction in acid media.

Cited by 13 publications

References 38 publications

Highly Stable Pt‐Based Ternary Systems for Oxygen Reduction Reaction in Acidic Electrolytes

Highly Stable Pt‐Based Ternary Systems for Oxygen Reduction Reaction in Acidic Electrolytes

Atomically Dispersed CoN4/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries

Enhancement of Activity and Development of Low Pt Content Electrocatalysts for Oxygen Reduction Reaction in Acid Media

Contact Info

Product

Resources

About

Atomically Dispersed CoN₄/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries