Synthesis and electrocatalytic performance of MWCNT-supported Ag@Pt core–shell nanoparticles for ORR

Yu, Steve S.‐F.; Lou, Qun; Han, Kefei; Wang, Zhongming; Zhu, Hong

doi:10.1016/j.ijhydene.2012.06.109

Cited by 64 publications

(55 citation statements)

References 32 publications

(19 reference statements)

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“…The Ag@Pt core-shell structure defined from the lattice fringes of the particles is observed in Fig. 2b [38]. After Ag atoms replaced Pt atoms, the platinum lattice expanded, or the platinum lattice atom spacing increased in accordance with the XRD results.…”

Section: Resultssupporting

confidence: 69%

“…Scheme 1 depiction of the synthesis procedure for the Ag@Pt/MWCNTs-HPW. The Ag@Pt/MWCNTs were prepared as described in a previous study [38]. Then, Ag@Pt/MWCNTs were doped with HPW to obtain Ag@Pt/MWCNTs-HPW electrocatalysts.…”

Section: Synthesis Of Ag@pt/mwcnts-hpw Electrocatalystmentioning

confidence: 99%

“…In this work, inspired by the remarkable works reported and on the basis of our previous studies [38], we immobilized negatively charged HPW on Ag@Pt/MWCNTs NPs attached to positively charged functional groups of CS by electrostatic interaction to obtain HPW-modified Ag@Pt/ MWCNTs electrocatalysts. The morphology and catalytic performance of the prepared catalysts were investigated, leading to the understanding of catalytic mechanisms in acidic media and the importance of HPW in hybrid catalysts.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and electrocatalytic performance of phosphotungstic acid-modified Ag@Pt/MWCNTs catalysts for oxygen reduction reaction

Wang

Zhu

et al. 2016

J Appl Electrochem

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Keggin-structured phosphotungstic acid H 3 PW 12 O 40 (HPW)-modified Ag@Pt/MWCNTs electrocatalysts were successfully prepared using a chemical impregnation method. Physical characterization by X-ray powder diffraction, high-resolution transmission electron microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy revealed that the HPW molecules were incorporated into the Ag@Pt/MWCNT structure The diameter of the catalyst used was about 4.0 nm, and electrochemical investigation results indicated that HPW could ameliorate electrocatalytic activity. The catalyst with HPW content of 25 % displayed the best excellent electrocatalytic activity with an electrochemically active area of 83.62 m 2 g -1 and a half-wave potential for the oxygen reduction reaction of 0.851 V, all ascribed to the high utilization of Pt and the protective effect of the HPW layer on the catalyst surface. The synergic effect of the HPW and Ag@Pt enhanced the rate of electron transfer and increased the catalytic efficiency of oxygen reduction reaction, influencing 4e -reduction reactions on Ag@Pt/MWCNTs-HPW catalysts. Graphical AbstractPhosphotungstic acid-modified Ag@Pt/MWCNTs catalysts were successfully synthesized by the chemical impregnation method. The morphology and catalytic performance of the prepared catalysts were investigated, leading to the understanding of catalytic mechanism of the catalyst in acidic medium, especially, the importance of HPW in the hybrid catalysts. The investigation indicated that the hybrid catalyst showed excellent activity toward oxygen reduction. Schematic diagram for mechanism of ORR on Ag@Pt/MWCNTs-HPW nanostructure.

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Section: Resultssupporting

confidence: 69%

Section: Synthesis Of Ag@pt/mwcnts-hpw Electrocatalystmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and electrocatalytic performance of phosphotungstic acid-modified Ag@Pt/MWCNTs catalysts for oxygen reduction reaction

Wang

Zhu

et al. 2016

J Appl Electrochem

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“…These Pt 3 Co/C catalysts exhibited over 200% increase in mass activity and over 300% increase in specfic activity when compared with disordered Pt 3 Co alloy nanoparticles as well as Pt/C particles. In addition to Co, other metals, such as Au, 284 Ag, 285 Cu, 214 Ni, 382 and Pd, 383,384 have also been used as the core inside a Pt shell.…”

Section: 372−375mentioning

confidence: 99%

Carbon-Supported Pt-Based Alloy Electrocatalysts for the Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells: Particle Size, Shape, and Composition Manipulation and Their Impact to Activity

Zhao²,

et al. 2015

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“…1A (311), respectively (Yu et al, 2012). In contrast, the 2θ angles of characteristic diffractions peaks of Ag@Pt-GRs as shown in Fig.…”

Section: Characterization Of Ag@pt-grs Nanocompositementioning

confidence: 93%

Synthesis and electrocatalytic effect of Ag@Pt core–shell nanoparticles supported on reduced graphene oxide for sensitive and simple label-free electrochemical aptasensor

Mazloum-Ardakani

Hosseinzadeh

Taleat

2015

Biosensors and Bioelectronics

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Synthesis and electrocatalytic performance of MWCNT-supported Ag@Pt core–shell nanoparticles for ORR

Cited by 64 publications

References 32 publications

Synthesis and electrocatalytic performance of phosphotungstic acid-modified Ag@Pt/MWCNTs catalysts for oxygen reduction reaction

Synthesis and electrocatalytic performance of phosphotungstic acid-modified Ag@Pt/MWCNTs catalysts for oxygen reduction reaction

Carbon-Supported Pt-Based Alloy Electrocatalysts for the Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells: Particle Size, Shape, and Composition Manipulation and Their Impact to Activity

Synthesis and electrocatalytic effect of Ag@Pt core–shell nanoparticles supported on reduced graphene oxide for sensitive and simple label-free electrochemical aptasensor

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