Porous dandelion-like gold@ palladium core-shell nanocrystals in-situ growth on reduced graphene oxide with improved electrocatalytic properties

He, Linghao; Song, Pei; Feng, Jiu‐Ju; Fang, Ruiqi; Yu, Danxia; Chen, Jianrong; Wang, Ai‐Jun

doi:10.1016/j.electacta.2016.03.098

Cited by 33 publications

(8 citation statements)

References 49 publications

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“…The as-synthesized nanocomposites demonstrate excellent electrocatalytic activity for CH 3 OH reaction in an alkaline media due to their enlarged surface area (39.01 m 2 /g), the robust interactions between Au@Pd nanocrystal and rGO, and the synergetic effect of two metals. 142 Kakati et al, in 2012, successfully synthesized Pd-Mo nanoparticles on MWCNTs by hydrothermal approach. A core-shell like structure under controlled pH, due to their strong surface isolation properties, size effect, metal nanoparticles, and support interactions and preparation conditions show electrocatalytic activity than Pdnanoparticles grown on MWCNT surface by the same strategy.…”

Section: Palladium and Palladium-based Compounds/carbon-based Compomentioning

confidence: 99%

Recent progress in development of efficient electrocatalyst for methanol oxidation reaction in direct methanol fuel cell

2020

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The human craving for energy is continually mounting and becoming progressively difficult to Gratify. At present, the world's massive energy demands are chiefly encountered by nonrenewable and benign fossil fuels. However, the development of dynamic energy cradles for a gradually thriving world to lessen fossil fuel reserve depletion and environmental concerns are persistent issues for society at present. The discovery of copious nonconventional resources to fill the gap between energy petition and supply is the extreme obligation of the modern era. A new emergent, clean, and robust alternate of fossil fuels are the fuel cells. Among the different types of fuel cells, direct methanol fuel cells are an outstanding option for light-duty vehicles and portable devices. A critical tactic for striving and sustainable energy sources is the production of highly proficient, economical, and green catalysts for energy storage and conversion devices. Up till now a broad range of research work is available to use Pt and modify Ptbased electrocatalysts to augment the CH 3 OH oxidation process. Platinum-based nanocubes, nanorods, nanoflower, hybrids of Pt with metal-oxides such as Fe 2 O 3 , TiO 2 , SnO 2 , MnO, Cu 2 O, ZnO, and with conducting polymers are extensively utilized in both acidic and basic media. Moreover, Pd-based materials, transition metal-based materials as well as MOF and MOF-derived materials are also the point of interest for researchers nowadays. However, the problem associated with their practical applications is that they can be effectively employed in basic media due to comparative less stability in acidic medium. This review article will deliver a broad vision of the current progress of the MOR process concerning noble metals, transition metals, and MOF-based materials.

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Section: Palladium and Palladium-based Compounds/carbon-based Compomentioning

confidence: 99%

Recent progress in development of efficient electrocatalyst for methanol oxidation reaction in direct methanol fuel cell

2020

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“…Recently, monodisperse, porous, and dandelion‐like core–shell Au@Pd nanocrystals (≈237.7 nm) were in situ grown on reduced graphene oxide (Au@Pd/RGO) by coreducing H 2 PdCl 4 and HAuCl 4 (Figure 15d). [ 129 ] Cetyl trimethyl ammonium chloride (CTAC) and I − acted as the structure‐directing agents by selectively binding to the specific Au (111) facets, yielding catalysts with delicate microstructures and properties (Figure 15e). The dandelion‐like Au@Pd/RGO (with an Au core of 107.1 nm and a Pd shell of 65.3 nm thick) possessed the highest ECSA of 39.01 m 2 g −1 among analogue core–shell Au@Pd catalysts with various thickness of Pd shell.…”

Section: Noble Metal‐based Catalystsmentioning

confidence: 99%

“…237.7 nm) were in situ grown on reduced graphene oxide (Au@Pd/RGO) by co-reducing H2PdCl4 and HAuCl4 (Figure 15d). [129] CTAC and Iacted as the structure- The joxidation/jpoisoning ratios were 9.56, 8.89, and 24.21 for the dandelion-like Au@Pd/RGO, commercial Pd/C, and Pd/RGO, respectively. Hence, this dandelion-like Au@Pd/RGO exhibited the best catalytic activity (Figure 15f), anti-poisoning ability, and the highest stability ( Figure 15g) compared with the commercial Pd/C and Pd/RGO counterparts.…”

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confidence: 99%

Metal‐Based Electrocatalysts for Methanol Electro‐Oxidation: Progress, Opportunities, and Challenges

Tong

Yan

Liang

et al. 2019

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Direct methanol fuel cells (DMFCs) are among the most promising portable power supplies because of their unique advantages, including high energy density/mobility of liquid fuels, This article is protected by copyright. All rights reserved. 2 low working temperature, and low emission of pollutants. Various metal-based anode catalysts have been extensively studied and utilized for the essential methanol oxidation reaction (MOR), due to their superior electrocatalytic performance. At present, especially with the rapid advance of nanotechnology, enormous efforts have been exerted to further enhancing the catalytic performance and minimizing the use of precious metals. Constructing multicomponent metal-based nanocatalysts with precisely designed structures can achieve this goal by providing highly tunable compositional and structural characteristics, which is promising for the modification and optimization of their related electrochemical properties. The recent advances of the metal-based electrocatalytic materials with rationally designed nanostructures and chemistries for MOR in DMFCs are highlighted and summarized herein. The effects of the well-defined nanoarchitectures on the improved electrochemical properties of the catalysts are illustrated. Finally, conclusive perspectives are provided on the opportunities and challenges for further refining the nanostructure of the metal-based catalysts and improving the electrocatalytic performance, as well as the commercial viability.

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“…Regarding the catalytic activity, these materials displayed an acceptable efficiency toward the methanol oxidation, with enhanced current densities depending of the increase in the methanol concentration. Regarding the use of Pd-Au catalysts, recently He and co-workers reported the deposition of Au@Pd core-shells on reduced graphene oxide, synthesized by chemical reduction in presence of cetyltrimethylammonium chloride and iodide ions [45]. This catalyst showed high catalytic activity and tolerance to carbonaceous species poisoning generated during the methanol oxidation, overcoming those observed for Pd nanoparticles supported on reduced graphene oxide and commercial Pd/C in alkaline media.…”

Section: Carbon-supported Pd-alloysmentioning

confidence: 99%

Palladium-Based Catalysts as Electrodes for Direct Methanol Fuel Cells: A Last Ten Years Review

2016

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Platinum-based materials are accepted as the suitable electrocatalysts for anodes and cathodes in direct methanol fuel cells (DMFCs). Nonetheless, the increased demand and scarce world reserves of Pt, as well as some technical problems associated with its use, have motivated a wide research focused to design Pd-based catalysts, considering the similar properties between this metal and Pt. In this review, we present the most recent advancements about Pd-based catalysts, considering Pd, Pd alloys with different transition metals and non-carbon supported nanoparticles, as possible electrodes in DMFCs. In the case of the anode, different reported works have highlighted the capacity of these new materials for overcoming the CO poisoning and promote the oxidation of other intermediates generated during the methanol oxidation. Regarding the cathode, the studies have showed more positive onset potentials, as fundamental parameter for determining the mechanism of the oxygen reduction reaction (ORR) and thus, making them able for achieving high efficiencies, with less production of hydrogen peroxide as collateral product. This revision suggests that it is possible to replace the conventional Pt catalysts by Pd-based materials, although several efforts must be made in order to improve their performance in DMFCs.

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Porous dandelion-like gold@ palladium core-shell nanocrystals in-situ growth on reduced graphene oxide with improved electrocatalytic properties

Cited by 33 publications

References 49 publications

Recent progress in development of efficient electrocatalyst for methanol oxidation reaction in direct methanol fuel cell

Recent progress in development of efficient electrocatalyst for methanol oxidation reaction in direct methanol fuel cell

Metal‐Based Electrocatalysts for Methanol Electro‐Oxidation: Progress, Opportunities, and Challenges

Palladium-Based Catalysts as Electrodes for Direct Methanol Fuel Cells: A Last Ten Years Review

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