Fe2P as a novel efficient catalyst promoter in Pd/C system for formic acid electro-oxidation in fuel cells reaction

Wang, Fulong; Xue, Huaiguo; Tian, Zhongxian; Wang, Xing; Feng, Ligang

doi:10.1016/j.jpowsour.2017.11.055

Cited by 114 publications

(50 citation statements)

References 45 publications

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“…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). Developing efficient electrocatalyst for formic acid oxidation reaction (FAOR) is crucial for the practical applications of DFAFCs . Although platinum (Pt)‐based electrocatalysts have been investigated for FAOR, they still suffer from high cost, low catalytic activity, and poor stability .…”

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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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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“…All catalysts showed a decrease in oxidation current at potentials higher than 0.90 V (Figure 3b), at which the Pt surface is heavily covered by water oxidation species, leaving fewer available sites for DME oxidation. Integration of the deconvoluted peaks [39] shows that the contribution of the first peak is 24 %, and that of the second peak is 76 %. [3,6,9,10] The measurements were carried out following the procedure described elsewhere.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Dimethyl Ether Oxidation on an Active SnO₂/Pt/C Catalyst for High‐Power Fuel Cells

2019

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Dimethyl ether (DME) has been considered a potential fuel for direct-feed proton exchange membrane fuel cells, owing to its high energy density, low toxicity, and low crossover through a Nafion® membrane in comparison to commonly reported fuels such as methanol, ethanol, and formic acid. The main hurdle in the implementation of direct DME fuel cells is the sluggish oxidation kinetics on state-of-the-art PtÀ based catalysts (e. g. Pt and PtRu). In this work, DME oxidation on a platinum-coated tin oxide catalyst (Pt/SnO 2 ) supported on carbon is reported and compared with commercial Pt/C catalysts. Our catalyst was synthesized by using the polyol method, and structural characterization was performed by using transmission electron microscopy and X-ray diffraction. Electrochemical analysis in acid solution showed overpotentials that are 50 mV lower than commercial Pt/C, as well as a higher oxidation current ( 44 mA À 1 Pt ). The peak power obtained using a 4 cm 2 laboratory prototype fuel cell (loading of 1.23 mg Pt cm À 2 on anode at 0.40 V) was 105 mW cm À 2 at 70°C. Online mass spectrometry analysis of the oxidation products gives insights into the new pathways of the electro-oxidation mechanism on this promising catalyst.

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“…The structural changes of Fe 7 S 8 /C and Fe(PO 3 ) 2 /Fe 2 O 3 /C HNSs were observed by TEM. In Figure 12, the size of Fe 7 Trasatti analysis is used to study the kinetic electrochemistry of Fe 7 S 8 /C HNSs for LIBs. [46,47] Figure 13a displays that the CV curves at different scan rates have similar shape except the increased peak intensities.…”

Section: Electrochemical Performance Of Fe 7 S 8 /C Hnssmentioning

confidence: 99%

“…In addition, metal sulfides/oxides/phosphates vary greatly in volume during charging and discharging process, which also hinders their commercial application . In various metal sulfides/oxides/phosphates as the anode electrode material, the iron‐based sulfides (Fe 3 S 4 or Fe 7 S 8 ), the oxides (Fe 2 O 3 or Fe 3 O 4 ) and the phosphates (FeP 2 ) are particularly concerned because they are expected to have high capacity and excellent cycle performance . It is reported that a simple method for preparing nanostructured Fe 3 S 4 with controlled hollow spheres was developed.…”

Section: Introductionmentioning

confidence: 99%

“…[5] In various metal sulfides/oxides/phosphates as the anode electrode material, the iron-based sulfides (Fe 3 S 4 or Fe 7 S 8 ), the oxides (Fe 2 O 3 or Fe 3 O 4 ) and the phosphates (FeP 2 ) are particularly concerned because they are expected to have high capacity and excellent cycle performance. [6,7] It is reported that a simple method for preparing nanostructured Fe 3 S 4 with controlled hollow spheres was developed. The as-prepared Fe 3 S 4 exhibits highly reversible capacity of 750 mA h g À 1 over 100 cycles at a current density of 0.2 A g À 1 .…”

Section: Introductionmentioning

confidence: 99%

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In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres

et al. 2019

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In this paper, Fe3O4 nanoparticles (Fe3O4 NPs) with an average diameter of 10 nm were grown in situ on the shell of hollow mesoporous carbon nanospheres (HMCNs) to form a new type of sesame balls‐like Fe3O4/C hollow nanospheres (HNSs) by thermal decomposition. After vulcanization and phosphating, Fe3O4/C HNSs are transformed into Fe7S8/C HNSs and Fe(PO3)2/Fe2O3/C HNSs, respectively. Compared with Fe3O4/C HNSs and Fe(PO3)2/Fe2O3/C HNSs, Fe7S8/C HNSs display good cycling stability as anode material for lithium ion batteries. When the current density is 1 A g−1, the reversible specific capacity of Fe7S8/C HNSs is 1006 mA h g−1 after 250 cycles. The rate performance and electrochemical properties of Fe7S8/C HNSs are significantly improved. Research shows that the capacitive behavior plays a major role in specific capacity contribution of Fe7S8/C HNSs electrode. The anchoring of Fe7S8 NPs on the shell of HMCNs avoids the aggregation of Fe7S8 NPs, promote the conductivity of composite and boost the delivery of electrons. This idea and expedient method of construction can be broadened to synthesize other hollow nanostructured material with preferable electrochemistry performance.

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Fe2P as a novel efficient catalyst promoter in Pd/C system for formic acid electro-oxidation in fuel cells reaction

Cited by 114 publications

References 45 publications

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

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

Dimethyl Ether Oxidation on an Active SnO₂/Pt/C Catalyst for High‐Power Fuel Cells

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres

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Fe2P as a novel efficient catalyst promoter in Pd/C system for formic acid electro-oxidation in fuel cells reaction

Cited by 114 publications

References 45 publications

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

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

Dimethyl Ether Oxidation on an Active SnO2/Pt/C Catalyst for High‐Power Fuel Cells

In Situ Derivatization for Boosted Lithium Storage Performance of Fe7S8/C Hollow Nanospheres

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Dimethyl Ether Oxidation on an Active SnO₂/Pt/C Catalyst for High‐Power Fuel Cells

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres