Remarkable performance of the unique Pd–Fe<sub>2</sub>O<sub>3</sub> catalyst towards EOR and ORR: non-Pt and non-carbon electrode materials for low-temperature fuel cells

Adhikary, Rajib; Sarkar, Dipankar; Mukherjee, M.; Datta, Jayati

doi:10.1039/d0ta08356a

Cited by 29 publications

(20 citation statements)

References 59 publications

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“…Proton‐exchange membrane fuel cell (PEMFC) has gained increasing attention owing to their high energy efficiency and environmental sustainability. [ 1,2 ] It has been identified as a strong competitor for the traditional internal combustion engine and off‐grid power supply. [ 3–7 ] However, the slow kinetics of cathodic oxygen reduction reaction (ORR) impedes the development of high efficient PEMFC.…”

Section: Introductionmentioning

confidence: 99%

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Gao

Zhou

Wang

et al. 2022

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202202071. The development of low-Pt catalysts with high activity and durability is critical for fuel cells. Here, Pt-skin wrapped sub-5 nm PtCo intermetallic nanoparticles are successfully mounted on single atom Co-N-C support by exploiting the barrier effect of Co-anchor. According to a collaborative experimental and computational investigation, the increased oxygen reduction reaction activity of PtCo/Co-N-C arises from the direct electron transfer from PtCo to Co-N-C, and the resulting optimal d-band center of Pt. Owing to such unique electronic structure interaction and synergistic effect, the specific and mass activities of PtCo/Co-N-C are up to 4.20 mA cm −2 and 2.71 A mg Pt −1 , respectively, with barely degraded stability after 40 000 CV cycles. The PtCo/ Co-N-C also exhibits outstanding activity as an ethanol electrocatalyst. This work shows a new and effective route to boost the overall efficiency of direct ethanol fuel cells in acidic media by integrating intermetallic low-Pt alloys and single atom carbon support.

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Section: Introductionmentioning

confidence: 99%

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Gao

Zhou

Wang

et al. 2022

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“…To date, noble metals (e.g., Pt and Pd) are still considered state-of-the-art candidates for ethanol oxidation reaction (EOR). [26][27][28][29] However, the efficiency of EOR has been seriously hampered by the slow reaction kinetics and intermediates poisons. [30] Previous works have proved that integrating Pd or Pt with additional elements (e.g., Cu, Sn, and Ni) is a promising strategy to remove the reaction intermediates and further boost EOR performance because of the tuned electronic structure of active sites.…”

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confidence: 99%

PdBi Single‐Atom Alloy Aerogels for Efficient Ethanol Oxidation

Wang

Jiao

Zheng

et al. 2021

Adv Funct Materials

110

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Single-atom alloys (SAAs) have ignited a surge of unprecedented interest as the advanced nanomaterials and opened many opportunities for wide applications. Herein, 3D porous aerogels comprising ionic liquid (IL) functionalized PdBi SAA building blocks with atomically dispersed Bi on Pd nanowires (IL/ Pd 50 Bi 1 ) are synthesized with accelerated gelation kinetics, which could serve as high-efficiency electrocatalysts for ethanol oxidation reaction (EOR). Benefiting from the unique structures of aerogels including synergistic effects of PdBi SAA nanowire networks and interface engineering, the optimized IL/Pd 50 Bi 1 aerogels display a nearly fourfold enhancement in mass activity and boosted stability for EOR compared to commercial Pd/C. Density functional theory calculations further demonstrate that isolated Bi atoms on Pd nanowire networks decrease the energy barrier of the rate-determining step, resulting in excellent electrocatalytic activity for EOR. This work provides a promising method for developing efficient SAA catalysts for fuel electrooxidation.

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“…The synthesis and electrocatalytic evaluations of noble metal‐containing heterogeneous nanocomposites bloom in recent years upon recognition of their huge potentials in electrocatalysis, for example, alcohol oxidation, 11–22 oxygen reduction, 23–25 and hydrogen evolution 26–32 . Typically, as revealed by in situ‐attenuated total reflection surface‐enhanced infrared radiation absorption spectroscopy, in nanocomposites composed of Pt and CoP components, the presence of CoP can promote the full oxidation of methanol to CO 2 , endow the Pt domains with high activity and improved anti‐poisoning capability in methanol electro‐oxidation 33 .…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous nanocomposites consisting of Pt₃Co alloy particles and CoP₂ nanorods towards high‐efficiency methanol electro‐oxidation

et al. 2021

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Heterogeneous nanocomposites comprising chemically distinct constituents are particularly promising in electrocatalysis. We herein report a synthetic strategy that combines the reduction of Pt and Co ionic precursors at an appropriate ratio with the subsequent phosphating at an elevated temperature for forming heterogeneous nanocomposites consisting of quasi‐spherical Pt3Co alloy domains and rod‐like CoP2 domains for high‐efficiency methanol electro‐oxidation. The strong electronic coupling between Pt3Co and CoP2 domains in the nanocomposites render the electron density around Pt atoms to decrease, which is favorable for reducing the adsorption of poisoning CO‐like intermediates on the catalyst surfaces. Accordingly, the as‐prepared heterogeneous Pt3Co–CoP2 nanocomposites show good performance for methanol electro‐oxidation both in acidic and alkaline media. In specific, at a Pt loading of only 6.4% on a common carbon substrate, the mass‐based activity of Pt3Co–CoP2 nanocomposites in an acidic medium is about 2 and 1.5 times as high as that of commercial Pt/C catalyst (20% mass loading) and home‐made Pt3Co alloy nanoparticles (8.0% mass loading), while in the alkaline medium, these values are 3 and 2, respectively.

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Remarkable performance of the unique Pd–Fe₂O₃ catalyst towards EOR and ORR: non-Pt and non-carbon electrode materials for low-temperature fuel cells

Abstract: Unique catalyst Pd NPs/Fe2O3 exhibits outstanding EOR and ORR activity in alkaline environment: a Pt and carbon free approach.

Cited by 29 publications

References 59 publications

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

PdBi Single‐Atom Alloy Aerogels for Efficient Ethanol Oxidation

Heterogeneous nanocomposites consisting of Pt₃Co alloy particles and CoP₂ nanorods towards high‐efficiency methanol electro‐oxidation

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Remarkable performance of the unique Pd–Fe2O3 catalyst towards EOR and ORR: non-Pt and non-carbon electrode materials for low-temperature fuel cells

Abstract: Unique catalyst Pd NPs/Fe2O3 exhibits outstanding EOR and ORR activity in alkaline environment: a Pt and carbon free approach.

Cited by 29 publications

References 59 publications

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

Exploiting the Synergistic Electronic Interaction between Pt‐Skin Wrapped Intermetallic PtCo Nanoparticles and Co‐N‐C Support for Efficient ORR/EOR Electrocatalysis in a Direct Ethanol Fuel Cell

PdBi Single‐Atom Alloy Aerogels for Efficient Ethanol Oxidation

Heterogeneous nanocomposites consisting of Pt3Co alloy particles and CoP2 nanorods towards high‐efficiency methanol electro‐oxidation

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Remarkable performance of the unique Pd–Fe₂O₃ catalyst towards EOR and ORR: non-Pt and non-carbon electrode materials for low-temperature fuel cells

Heterogeneous nanocomposites consisting of Pt₃Co alloy particles and CoP₂ nanorods towards high‐efficiency methanol electro‐oxidation