Pt4PdCu0.4 alloy nanoframes as highly efficient and robust bifunctional electrocatalysts for oxygen reduction reaction and formic acid oxidation

Ye, Wei; Chen, Shuangming; Ye, Mengshan; Ren, Chenhao; Ma, Jun; Long, Ran; Wang, Chengming; Yang, Jian; Li, Song; Xiong, Yujie

doi:10.1016/j.nanoen.2017.07.025

Cited by 95 publications

(77 citation statements)

References 37 publications

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“…The value of I pI / I pII for PtPdCo MNs is higher than those of PtPd MNs and Pt/C catalysts; this indicates that the dehydrogenation pathway is dramatically enhanced (Figure c). This may be attributed to both the ensemble and structure effects of the PtPdCo MNs . The occurrence of an indirect pathway requires consecutive platinum sites.…”

Section: Resultsmentioning

confidence: 99%

“…Direct formic acid fuel cells (DFAFCs) are a promising clean energy conversion device with the distinct merits of high power density, lower fuel crossover, and low toxicity . Developing efficient electrocatalysts for the anodic formic acid oxidation reaction (FAOR) and the cathodic oxygen reduction reaction (ORR) is an essential step for the development of DFAFCs . At present, the noble metal platinum is the most commonly used catalyst for both FAOR and ORR .…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

et al. 2018

Chemistry An Asian Journal

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The facile preparation of platinum-based catalysts with designed compositions and structures is of great importance for fuel cells. In this work, a one-pot method is developed to synthesize monodispersed trimetallic PtPdCo mesoporous nanoparticles (PtPdCo MNs) with uniform morphology and size. The proposed synthetic method does not require any hard template or organic solvent, which greatly simplifies the preparation procedure. PtPdCo MNs, with a highly porous structure, exhibit enhanced electrocatalytic activities and excellent stabilities for both the formic acid oxidation reaction and the oxygen reduction reaction, relative to bimetallic PtPd MNs and commercial Pt/C catalyst. The proposed synthetic method is highly valuable for the design of mesoporous multimetallic catalysts for fuel cells.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

et al. 2018

Chemistry An Asian Journal

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“…Direct formic acid fuel cells (DFAFCs) are competent power sources for portable electronic devices by using formic acid as liquid fuel . Formic acid has the advantages of less toxicity and low crossover flux through Nafion membrane . Also, DFAFCs have a higher theoretical open circuit voltage (1.48 V) than hydrogen fuel cells (1.23 V) and direct methanol fuel cells (1.21 V).…”

Section: Introductionmentioning

confidence: 99%

Ultrathin‐Carbon‐Layer‐Protected PtCu Nanoparticles Encapsulated in Carbon Capsules: A Structure Engineering of the Anode Electrocatalyst for Direct Formic Acid Fuel Cells

Chen²,

Zhao

et al. 2019

Part & Part Syst Charact

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Structure engineering is an effective strategy to enhance the performance of electrocatalysts for the formic acid oxidation reaction. However, it remains a challenge to prepare a highly active electrocatalyst based on a distinct understanding of its structure‐dependent performance. The design and synthesis of ultrathin‐carbon‐layer‐protected PtCu nanoparticles (NPs) encapsulated in a N‐doped carbon capsule (PtCu@NCC) is reported. This system is fabricated by using Zn‐based metal–organic frameworks as the carbon support source and metal‐containing tannic acid as the protecting shell template. It displays 9.8‐ and 9.6‐fold enhancements in mass activity and specific activity compared to commercial Pt/C. Moreover, a constructed direct formic acid fuel cell using PtCu@NCC as the anodic electrocatalyst delivers a maximum power density of 121 mW cm−2. Significantly, PtCu@NCC exhibits superior structural stability and catalytic durability in both half‐cell and full‐cell tests. A mechanism study reveals that the enhanced activity is partially attributed to facilitated electro‐oxidation kinetics of formic acid in the unique structure of PtCu@NCC, while the excellent durability stems from the “protecting effect” of the in‐situ‐formed ultrathin carbon layer on the surface of the PtCu NPs. This work opens a new avenue for the development of high‐performance electrocatalysts for fuel‐cell applications by offering essential insights into the structure–performance relationship of the materials.

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“…Apart from the chemical composition, the electrocatalytic performance of nanocrystals is strongly dependent on their morphology and structure . Density functional theory calculations indicate that the surface structure of the nanocrystals favors the binding of FAO intermediates, leading to amplified catalytic activity and improved stability .…”

Section: Methodsmentioning

confidence: 99%

Facile Synthesis of Porous Pd₃Pt Half‐Shells with Rich “Active Sites” as Efficient Catalysts for Formic Acid Oxidation

Yan

et al. 2018

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Exploring highly efficient electrocatalysts is greatly important for the widespread uptake of the fuel cells. However, many newly generated nanocrystals with attractive nanostructures often have extremely limited surface area or large particle-size, which leads them to display limited electrocatalytic performance. Herein, a novel anode catalyst of hollow and porous Pd Pt half-shells with rich "active sites" is synthesized by using urea as a guiding surfactant. It is identified that the formation of Pd Pt half-shells involves the combination of bubble guiding, in situ deposition of particles and bubble burst. The obtained Pd Pt half-shells demonstrate a rich edge area with abundant exposed active sites and surface defects, indicating great potential for the electrocatalysis. When used as an electrocatalyst, the Pd Pt half-shells exhibit remarkably improved electrocatalytic performance for formic acid oxidation (FAO), where it promotes the dehydrogenation process of FAO by suppressing the formation of poisonous species CO via the electronic effect and ensemble effect.

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Pt4PdCu0.4 alloy nanoframes as highly efficient and robust bifunctional electrocatalysts for oxygen reduction reaction and formic acid oxidation

Cited by 95 publications

References 37 publications

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Ultrathin‐Carbon‐Layer‐Protected PtCu Nanoparticles Encapsulated in Carbon Capsules: A Structure Engineering of the Anode Electrocatalyst for Direct Formic Acid Fuel Cells

Facile Synthesis of Porous Pd₃Pt Half‐Shells with Rich “Active Sites” as Efficient Catalysts for Formic Acid Oxidation

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Pt4PdCu0.4 alloy nanoframes as highly efficient and robust bifunctional electrocatalysts for oxygen reduction reaction and formic acid oxidation

Cited by 95 publications

References 37 publications

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Ultrathin‐Carbon‐Layer‐Protected PtCu Nanoparticles Encapsulated in Carbon Capsules: A Structure Engineering of the Anode Electrocatalyst for Direct Formic Acid Fuel Cells

Facile Synthesis of Porous Pd3Pt Half‐Shells with Rich “Active Sites” as Efficient Catalysts for Formic Acid Oxidation

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Facile Synthesis of Porous Pd₃Pt Half‐Shells with Rich “Active Sites” as Efficient Catalysts for Formic Acid Oxidation