Studies on the synthesis and electrocatalytic properties of hollow PdAu nanocatalysts

Luo, Lai-Ming; Zhang, Ronghua; Du, Junliang; Yang, Fan; Li, Hongming; Yang, Yi; Zhou, Xin-Wen

doi:10.1016/j.ijhydene.2017.03.015

Cited by 24 publications

(8 citation statements)

References 45 publications

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“…26 Later, we also found that bimetal hollow PdAu alloy catalysts obtained by the successive reduction method show enhanced electrochemical properties and stability compared to those of commercial Pd black and Pd/C. 27 Trimetallic PtPdRu nanocatalysts synthesized by a hydrothermal method with triblock copolymer P123 as reducer have superior catalytic activity as compared to those of corresponding bimetallic PtPd and PtRu nanocatalysts. 28 In this paper, trimetallic CoAuPd catalysts were synthesized by the successive reduction method, in which sodium borohydride (NaBH 4 ) was used as reductant and Pluronic P123 was used as protecter.…”

Section: Introductionmentioning

confidence: 78%

“…Some hollow nanospheres can be observed in Figure d because the GRR occurred during the crystal nucleation and growth stage. These hollow nanospheres usually have more reaction active sites and higher catalytic activity than the identical solid structures because both the inner and the outer surface of the hollow nanospheres can be utilized …”

Section: Resultsmentioning

confidence: 99%

“…Hollow CoPd nanocatalysts were prepared by a successive reduction method using sodium borohydride as reducer, and the influence of electrochemical dealloying to the structure and catalytic activity was also discussed . Later, we also found that bimetal hollow PdAu alloy catalysts obtained by the successive reduction method show enhanced electrochemical properties and stability compared to those of commercial Pd black and Pd/C . Trimetallic PtPdRu nanocatalysts synthesized by a hydrothermal method with triblock copolymer P123 as reducer have superior catalytic activity as compared to those of corresponding bimetallic PtPd and PtRu nanocatalysts .…”

Section: Introductionmentioning

confidence: 90%

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Synthesis of 3D Thornbush-like Trimetallic CoAuPd Nanocatalysts and Electrochemical Dealloying for Methanol Oxidation and Oxygen Reduction Reaction

Luo

Chen

et al. 2018

ACS Appl. Energy Mater.

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Trimetallic CoAuPd nanocatalysts are synthesized by a classical successive reduction method using P123 as protectant and sodium borohydride as reductant. The structure, composition, and morphology of the nanocatalysts are measured and characterized through different techniques. The obtained results show that the trimetallic CoAuPd nanocatalysts have two kinds of super three-dimensional (3D) structures: the novel nanothornbush and nanocluster structure. The formation of these epitaxial multilevel structures may be attributed to the Co seed crystal ferromagnetism and multilevel self-assembly. The electrocatalytic properties of the CoAuPd nanocatalysts are investigated deeply. Furthermore, the electrochemical dealloying method is also adopted to enhance the electrocatalytic performance. The results of dealloying gradient tests for the methanol oxidation reaction (MOR) demonstrate that the reaction active sites, electrochemical specific active areas, and catalytic activity of the CoAuPd nanocatalysts gradually increased during the dealloying process. In addition, the CoAuPd nanocatalysts also present remarkably enhanced activity for oxygen reduction reaction (ORR) activity after the dealloying process. The extraordinary catalytic performance of the dealloyed CoAuPd may be derived from the special epitaxial multilevel structure such as nanothornbush and nanocluster structures, the assembled components of featherness nanoparticles and hollow spherical nanoparticles, as well as plenty of filamentous nanocrystals. Especially, the CoAuPd nanocatalysts have more discovered and exposed active sites, and can form the CoAuPd@AuPd core–shell structure with a rough AuPd alloy surface after electrochemical dealloying. The efficient catalytic performance of the trimetallic CoAuPd nanocatalysts makes them an excellent candidate as electrocatalysts used for a direct methanol fuel cell (DMFC).

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Section: Introductionmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

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Synthesis of 3D Thornbush-like Trimetallic CoAuPd Nanocatalysts and Electrochemical Dealloying for Methanol Oxidation and Oxygen Reduction Reaction

Luo

Chen

et al. 2018

ACS Appl. Energy Mater.

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“…1 (c and f). The four diffraction rings from the inside out are indexedto (111), (200), (220), (311) facetsof face center cubic (fcc) noble metal, respectively [28,35] . The SAED image ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Heat treatment bimetallic PdAu nanocatalyst for oxygen reduction reaction

Zhan

Guo

et al. 2020

Journal of Energy Chemistry

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“…Further, the usage of better surfactant will reduce the agglomeration and formation of smaller particles for an extended period of usage. The practice of non‐ionic detergents of block copolymers is in the line of investigation towards the synthesis of bimetallic/alloy particles . In this regard, our study aimed to synthesis nanoalloy PdCu/CNT using Triton X‐100 as a stabilizer in the presence of ultrasonic irradiations though simple co‐reduction process and as‐synthesized material used as the electrocatalyst towards the electro‐oxidation of the methanol and ethylene glycol in alkaline medium.…”

Section: Introductionmentioning

confidence: 99%

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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Studies on the synthesis and electrocatalytic properties of hollow PdAu nanocatalysts

Cited by 24 publications

References 45 publications

Synthesis of 3D Thornbush-like Trimetallic CoAuPd Nanocatalysts and Electrochemical Dealloying for Methanol Oxidation and Oxygen Reduction Reaction

Synthesis of 3D Thornbush-like Trimetallic CoAuPd Nanocatalysts and Electrochemical Dealloying for Methanol Oxidation and Oxygen Reduction Reaction

Heat treatment bimetallic PdAu nanocatalyst for oxygen reduction reaction

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

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