Rapid microwave-assisted solvothermal synthesis of shape-controlled Pt-Ni alloy nanoparticles for PEMFC

Lin, Rui; Cai, Xin; Zeng, Hao; Pu, Hongting; Yan, Haixu

doi:10.1016/j.electacta.2018.03.190

Cited by 29 publications

(16 citation statements)

References 41 publications

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“…However, the destruction of the structural integrity, especially in the preparation of membrane electrode, remain a major setback in MEA test. Yan et al 60 used microwave-assisted solvothermal method to synthesize PtNi polyhedral alloy nanoparticles for PEMFCs. MEA tests were carried out in the Greenlight (G20) under H 2 /Air (1.8/2.5), cell temperature of 80 °C and active areas of 50 cm 2 at 0.8 MPa, it is found that the power density can reach 400 mW cm −2 with the Pt loading of anode and cathode is 0.2 and 0.4 Pt mg cm −2 .…”

Section: Pt Alloysmentioning

confidence: 99%

Recent advances in Pt-based electrocatalysts for PEMFCs

Zhang

Yang

et al. 2021

RSC Adv.

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Section: Pt Alloysmentioning

confidence: 99%

Recent advances in Pt-based electrocatalysts for PEMFCs

Zhang

Yang

et al. 2021

RSC Adv.

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“…Proton exchange membrane fuel cells (PEMFCs) have attracted widespread attention in recent years, which is ascribed to direct conversion of chemical energy into electrical energy, generation of high power density, and low pollution of the environment. However, the large-scale application of PEMFCs faces challenges to realize immediately since Pt-based catalysts as core components are scarce and cost-intensive. − In recent years, more research studies have focused on creating a novel catalyst system with high performance and a low content of platinum group metal, including Pt intermetallic catalysts, − shape-controlled Pt catalysts, − and platinum-free systems. − Another direction related to the carrier material governs the dispersion of platinum and oxidation resistance of the catalyst since the corrosion of the carrier causes the shedding of precious metals and catalyst deactivation. , Therefore, the physical and chemical properties of the carrier are effective in decreasing the cost of platinum and enhancing the durability of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Anchored Pt-Co Nanoparticles on Honeycombed Graphene as Highly Durable Catalysts for the Oxygen Reduction Reaction

Lin

Zheng

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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Durability is an important factor in evaluating the performance of a catalyst. In this work, the spatial protection of the carrier to nanoparticles was considered to improve the durability of the catalyst. It is found that a honeycombed graphene with a three-dimensional (3D)-hierarchical porous structure (3D HPG) can help to reduce the shedding of Pt-Co nanoparticles (Pt-Co NPs) because 3D HPG can form a protective layer to reduce the direct erosion of Pt-Co NPs on the interface by an electrolyte. Then, appropriate oxygen groups were introduced on the 3D reduced hierarchical porous graphene oxide (3D rHPGO) to improve the dispersion of Pt-Co NPs on the surface of the carrier. It was found that the Pt d-band of the catalyst was anchored by π sites of carbonyl of an oxygen group. After optimization, the catalyst (referred to as Pt-Co/3D rHPGO) achieved a 2-fold enhancement in mass activity than that of a commercial Pt/C catalyst. More importantly, after the accelerated durability test (ADT) of 20 000 cycles, the Pt-Co/3D rHPGO catalyst can almost sustain this level of performance, whereas other catalysts showed a comparatively large loss of activity. According to the results, the high durability of Pt-Co/3D rHPGO was attributed to spatial protection of Pt-Co NPs and the defects on the surface allowed the electrolyte to enter. In addition, oxygen groups provided an anchoring effect on nanoparticles. Thus, the Pt-Co/3D rHPGO electrocatalyst exhibited splendid durability, holding a potential to be applied in PEMFC for long-term work.

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“…To solve this problem, in recent years much attention has been paid to the development of gram-scale synthesis technologies [32][33][34][35]. Such methods make it possible to produce the amount of catalysts from one to several tens of grams in a single synthesis, or to carry out a flow synthesis with continuous production of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Gram-Scale Synthesis of CoO/C as Base for PtCo/C High-Performance Catalysts for the Oxygen Reduction Reaction

et al. 2021

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The composition, structure, catalytic activity in the ORR and stability of PtCo/C materials, obtained in two stages and compared with commercial Pt/C analogs, were studied. At the first stage of the synthesis performed by electrodeposition of cobalt on a carbon support, a CoOx/C composite containing 8% and 25 wt% cobalt oxide was successfully obtained. In the second step, PtCoOx/C catalysts of Pt1.56Co and Pt1.12Co composition containing 14 and 30 wt% Pt, respectively, were synthesized based on the previously obtained composites. According to the results of the composition and structure analysis of the obtained PtCoOx/C catalysts by X-ray diffraction (XRD), X-ray fluorescence analysis (XRF), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) methods, the formation of small bimetallic nanoparticles on the carbon support surface has been proved. The resulting catalysts demonstrated up to two times higher specific catalytic activity in the ORR and high stability compared to commercial Pt/C analogs.

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Rapid microwave-assisted solvothermal synthesis of shape-controlled Pt-Ni alloy nanoparticles for PEMFC

Cited by 29 publications

References 41 publications

Recent advances in Pt-based electrocatalysts for PEMFCs

Recent advances in Pt-based electrocatalysts for PEMFCs

Anchored Pt-Co Nanoparticles on Honeycombed Graphene as Highly Durable Catalysts for the Oxygen Reduction Reaction

Gram-Scale Synthesis of CoO/C as Base for PtCo/C High-Performance Catalysts for the Oxygen Reduction Reaction

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