One-step stabilizer-free synthesis of porous bimetallic PdCu nanofinger supported on graphene for highly efficient methanol electro-oxidation

Cui, Xuexue; Wang, Xiaosong; Xu, Xiaowei; Yang, Shuguang; Wang, Yi

doi:10.1016/j.electacta.2017.11.054

Cited by 25 publications

(12 citation statements)

References 55 publications

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“…The conversion of sp 2 to sp 3 carbon reveals the intensity of the d band and the perfect arrangement of sp 2 graphitic carbons exposes by the intensity of the G band. The existence of a small peak in PdCu sample shows the E g and B 2g modes of metallic oxide bonds which formed due to the occurrence of surface oxides under air condition . Further, after loading of PdCu nanoalloy, the intensity of the D band increased more compared to CNT that gives the validation towards the incorporation of PdCu nanoalloy in the supporting framework of CNTs.…”

Section: Resultsmentioning

confidence: 94%

Palladium/Copper Nanoalloy Supported on Carbon Nanotubes for the Electrooxidation of Methanol and Ethylene Glycol

et al. 2019

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Herein, we demonstrate the ultrasonic‐assisted synthesis of Palladium/Copper nanoalloy supported on carbon nanotubes (PdCu/CNT) towards the electro‐oxidation of methanol and ethylene glycol using Triton X‐100 as a stabilizer. Structural and morphological analysis manifests the formation of PdCu nanoalloy on the surface of CNTs. For the electrochemical comparison, PdCu on Vulcan carbon (PdCu/VC) also synthesized in the same procedure and characterized thoroughly. The electrochemical evaluations of the PdCu/CNT reveal the better mass activity of 1021.6 mA mg[pd]−1 which is 1.6‐fold higher than PdCu/VC and 5.9 times advanced than commercial Pd/C catalysts towards methanol electrooxidation. Also, for electrooxidation of ethylene glycol, the mass activity of the PdCu/CNT is more of about 1219.8 mA mg[pd]−1 which is around 1.7 times enhanced than PdCu/VC and 4.1 times improved than commercial Pd/C catalysts. Furthermore, sonochemically prepared PdCu/CNT provides improved stability up to 3600s in both methanol and ethylene glycol oxidation reactions. The accredited activity enhancement due to its unique construction of zero‐dimensional structured PdCu nanoalloy with one‐dimensional CNTs and modified electronic effect of Pd on it.

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Section: Resultsmentioning

confidence: 94%

Palladium/Copper Nanoalloy Supported on Carbon Nanotubes for the Electrooxidation of Methanol and Ethylene Glycol

et al. 2019

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“…Similarly, as illustrated in Figure d, the peaks situated at 932.0 and 954.1 eV are assigned to metallic state of Cu and the weaker peaks situated at 934.4 and 954.1 eV suggest the existence of Cu II . The satellite peaks situated at 942.3 and 963.2 eV are corresponded to CuO which are caused by oxidation of Cu on the surface of PdCu NCs . Particularly, in comparison with the pristine Pd (335.0 eV, 340.3 eV) and Cu (932.6 eV, 952.2 eV), the binding energy of Pd 3d and Cu 2p of echinus‐like PdCu NCs exhibit positive and negative shifts, respectively.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

Zhang

Ren

Liu

et al. 2019

Chemistry An Asian Journal

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Exploiting high‐performance and inexpensive electrocatalysts for methanol electro‐oxidation is conductive to promoting the commercial application of direct methanol fuel cells. Here, we present a facile synthesis of echinus‐like PdCu nanocrystals (NCs) via a one‐step and template‐free method. The echinus‐like PdCu NCs possess numerous straight and long branches which can provide abundant catalytic active sites. Owing to the novel nanoarchitecture and electronic effect of the PdCu alloy, the echinus‐like PdCu NCs display high electrocatalytic performance toward methanol oxidation reaction in an alkaline medium. The mass activity of echinus‐like PdCu NCs is 1202.1 mA mgPd−1, which is 3.7 times that of Pd/C catalysts. In addition, the echinus‐like structure, as a kind of three‐dimensional self‐supported nanoarchitecture, endows PdCu NCs with significantly enhanced stability and durability. Hence, the echinus‐like PdCu NCs hold prospect of being employed as electrocatalysts for direct alcohol fuel cells.

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“…The synthesized Pd 7 Cu 3 /rGO catalyst demonstrates a synergistically boosted electrocatalytic activity and stability, superior to commercial Pd/C. Moreover, methanol oxidation occurs with super kinetics with activation polarization occurring at a low sweep rate while concentration polarization occurring at a high sweep rate 132 …”

Section: Materials For a Methanol Oxidation Reactionmentioning

confidence: 97%

“…Moreover, methanol oxidation occurs with super kinetics with activation polarization occurring at a low sweep rate while concentration polarization occurring at a high sweep rate. 132 In the same year, Zhang et al followed a two-step method to fabricate anode nanocatalyst, Pd/Cu 3 P/RGO to utilize for methanol oxidation reaction as a Pt substitute due to its low-cost, high abundance, and CO tolerance. Besides, Cu 3 P/rGO support is easy to prepare and promotes fine dispersion of Pd-nanoparticles and results in surface area enhancement.…”

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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One-step stabilizer-free synthesis of porous bimetallic PdCu nanofinger supported on graphene for highly efficient methanol electro-oxidation

Cited by 25 publications

References 55 publications

Palladium/Copper Nanoalloy Supported on Carbon Nanotubes for the Electrooxidation of Methanol and Ethylene Glycol

Palladium/Copper Nanoalloy Supported on Carbon Nanotubes for the Electrooxidation of Methanol and Ethylene Glycol

Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

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

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