Construction of Dandelion-like Clusters by PtPd Nanoseeds for Elevating Ethanol Eletrocatalytic Oxidation

Pan, Yuxia; Guo, Xiaoyu; Li, Mengzhu; Liang, Yinhua; Wu, Yiping; Wen, Ying; Yang, Haifeng

doi:10.1016/j.electacta.2015.01.205

Cited by 18 publications

(7 citation statements)

References 28 publications

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“…Thus, activities at 0.45 and 0.6 V are listed in the third and fourth columns, respectively. The second column provides the EOR activity after 30 min at 0.45 V. As the list shows, Pd-based ,,,,,, and PdPt-based ,, catalysts performed better than Pt-based − ,, catalysts prior to this work for EOR in alkaline solutions. Different from EOR in acid, where Rh and Sn oxide greatly promoted the activity on Pt, , Au is involved in the most active Pt-based (this work) and Pd-based catalysts for EOR in alkaline solutions …”

Section: Results and Discussionmentioning

confidence: 99%

“…The optimal composition, PtRh 1/3 SnO 2 , yields a peak current of 1.5 A mg –1 platinum group metal (PGM) and a current of 0.14 A mg –1 PGM after 1 h at 0.45 V . In alkaline media, Pd-based catalysts − outperform Pt-based catalysts − with the peak current reaching 40 A mg –1 PGM on Au/Ag/Pd alloy aerogels . The progress for higher PGM activity at peak current is very encouraging, but more attention is needed to lower the onset potential and improve the C1–12e selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Direct 12-Electron Oxidation of Ethanol on a Ternary Au(core)-PtIr(Shell) Electrocatalyst

et al. 2019

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Understanding the roles of metals and atomic structures in activating various elementary steps of electrocatalytic reactions can help rational design of binary or ternary catalysts for promoting activity toward desirable products via favorable pathways. Here we report on a newly developed ternary Au@PtIr core−shell catalyst for ethanol oxidation reaction (EOR) in alkaline solutions, which exhibits an activity enhancement of 6 orders of magnitude compared to AuPtIr alloy catalysts. Analysis of in situ infrared reflection absorption spectra for Au@PtIr and its bimetallic subsets, Au@Pt and PtIr alloy, found that monatomic steps and Au-induced tensile strain on PtIr facilitate C−C bond splitting via ethanol dissociative adsorption and Ir promotes dehydrogenation at low potentials. As evidenced by the CO band being observed only for the PtIr alloy that is rather inactive for ethanol dissociative adsorption, we propose that splitting the C−C bond at the earliest stage of EOR activates a direct 12-electron full oxidation pathway because hydrogen-rich fragments can be fully oxidized without CO as a poisoning intermediate. The resulting synergy of complementary effects of Au core and surface Ir leads to an outstanding performance of Au@PtIr for EOR as characterized by a low onset potential of 0.3 V and 8.3 A mg −1 all-metals peak current with 57% currents generated via full ethanol oxidation.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct 12-Electron Oxidation of Ethanol on a Ternary Au(core)-PtIr(Shell) Electrocatalyst

et al. 2019

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“…Besides, other mild reductants (such as ascorbic acid and CO) were also used to prepare bimetallic particles. 35,36 Some of other bimetallic materials synthesized by chemical reduction are summarized in Table 1.…”

Section: Synthesis Of Bimetallic Particlesmentioning

confidence: 99%

Synthesis and use of bimetals and bimetal oxides in contaminants removal from water: a review

Cheng

2015

RSC Adv.

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“…In many works, it is used to synthesize bimetallic nanostructures for example, the successful preparation of Ag@Cu [ 51 ] and Au@Pd [ 52 ] bimetallic nanostructures. The weak reducing agent can be AA, H 2 , or CO [ 53 , 54 ], etc.…”

Section: Fabrication Methodsmentioning

confidence: 99%

Zero→Two-Dimensional Metal Nanostructures: An Overview on Methods of Preparation, Characterization, Properties, and Applications

et al. 2021

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Metal nanostructured materials, with many excellent and unique physical and mechanical properties compared to macroscopic bulk materials, have been widely used in the fields of electronics, bioimaging, sensing, photonics, biomimetic biology, information, and energy storage. It is worthy of noting that most of these applications require the use of nanostructured metals with specific controlled properties, which are significantly dependent on a series of physical parameters of its characteristic size, geometry, composition, and structure. Therefore, research on low-cost preparation of metal nanostructures and controlling of their characteristic sizes and geometric shapes are the keys to their development in different application fields. The preparation methods, physical and chemical properties, and application progress of metallic nanostructures are reviewed, and the methods for characterizing metal nanostructures are summarized. Finally, the future development of metallic nanostructure materials is explored.

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Construction of Dandelion-like Clusters by PtPd Nanoseeds for Elevating Ethanol Eletrocatalytic Oxidation

Cited by 18 publications

References 28 publications

Direct 12-Electron Oxidation of Ethanol on a Ternary Au(core)-PtIr(Shell) Electrocatalyst

Direct 12-Electron Oxidation of Ethanol on a Ternary Au(core)-PtIr(Shell) Electrocatalyst

Synthesis and use of bimetals and bimetal oxides in contaminants removal from water: a review

Zero→Two-Dimensional Metal Nanostructures: An Overview on Methods of Preparation, Characterization, Properties, and Applications

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