Improved hydrogen oxidation reaction under alkaline conditions by Au–Pt alloy nanoparticles

Lu, Lijuan; Peng, Lishan; Li, Li; Li, Jing; Huang, Xun; Wei, Zidong

doi:10.1016/j.jechem.2019.02.008

Cited by 27 publications

(5 citation statements)

References 42 publications

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“…Peng et al [19] showed that the deposition of Pt-submonolayers on AuNPs and the Pt coverage-dependent electrocatalytic activity for MOR, also revealed that the low Pt coverage such as monoatomic-thick layers exhibited remarkably higher electrocatalytic performance and structural stability, whereas at higher Pt-shell thickness there was not any obvious increment found in the electrocatalytic activity. The surface Pt-rich bimetallic nanocatalysts with different Au/Pt atomic ratios have demonstrated enhanced hydrogenation selectivity or activity than AuPt alloys and monometallic Pt nanomaterials [20,21]. In addition, Au@Pt NPs showed the highest response current for the catalytic oxidation of glucose solution compared with those of Pt and Au NPs [22,23].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

et al. 2019

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Bimetallic Au@Pt nanoparticles (NPs) with Pt monolayer shell are of much interest for applications in heterogeneous catalysts because of enhanced catalytic activity and very low Pt-utilization. However, precisely controlled synthesis with uniform Pt-monolayers and stability on the AuNPs seeds remain elusive. Herein, we report the controlled deposition of Pt-monolayer onto uniform AuNPs seeds to obtain Au@Pt core–shell NPs and their Pt-coverage dependent electrocatalytic activity for methanol electro-oxidation. The atomic ratio between Au/Pt was effectively tuned by varying the precursor solution ratio in the reaction solution. The morphology and atomic structure of the Au@Pt NPs were analyzed by high-resolution scanning transmission electron microcopy (HR-STEM) and X-ray diffraction (XRD) techniques. The results demonstrated that the Au@Pt core–shell NPs with Pt-shell thickness (atomic ratio 1:2) exhibit higher electrocatalytic activity for methanol electro-oxidation reaction, whereas higher and lower Pt ratios showed less overall catalytic performance. Such higher catalytic performance of Au@Pt NPs (1:2) can be attributed to the weakened CO binding on the Pt/monolayers surface. Our present synthesis strategy and optimization of the catalytic activity of Au@Pt core–shell NPs catalysts provide promising approach to rationally design highly active catalysts with less Pt-usage for high performance electrocatalysts for applications in fuel cells.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

et al. 2019

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“…The highly magnified images (HRTEM) shown in Figure 2B demonstrates the lattice fringe of PtRu/C-0.75. HRTEM images in Figure 2B reveal that the nanoparticles tend to form a separated phase since the determined d-spacing of 0.205 nm, which corresponds to the (101) planes of Ru, and other determined d-spacing of nanoparticles is 0.217 nm equal to Pt (111) ( Lu et al, 2020 ). Due to the uniform distribution of Ru and Pt nanoparticles in the carbon, a unique phase is generated in the activated carbon, as shown in the mapping findings from the scanning transmission electron microscopic (STEM) diagram in Figure 2C .…”

Section: Resultsmentioning

confidence: 97%

Nano-Sized PtRu/C Electrocatalyst With Separated Phases and High Dispersion Improves Electrochemical Performance of Hydrogen Oxidation Reaction

et al. 2022

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Alloys and core-shell nanoparticles have recently received enormous attention which opened up new avenues for highly active catalysts. Despite considerable advances in this field, the majority of proposed approaches suffer from either complicated procedures or unstable structures, severely hindering their practical applications. Here, we successfully synthesized alloy electrocatalyst with separated phases, PtRu alloy nanoparticles robustly supported by carbon matrix (PtRu/C), using a convenient two-step solvothermal method. The constructed PtRu/C at different NaOH contents (0–1.25 mmol) were compared and electrochemical activity were evaluated by the hydrogen oxidation reaction (HOR). In contrast, the homogeneous distribution and minimum average size of Ru and Pt nanoparticles on carbon, appeared at approximately 4 nm, proving that PtRu/C-0.75 possessed abundant accessible active sites. The catalytic activities and the reaction mechanism were studied via electrochemical techniques. PtRu/C-0.75 has excellent activity due to its unique electronic structure and efficient charge transfer, with the largest j0 value of 3.68 mA cm−2 in the HOR.

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“…The appearance is consistent with a previous report. 28 The high-resolution XPS analysis of Au 4f and Pt 4f regions in AuPt nanoalloy is displayed in Fig. 4 .…”

Section: Resultsmentioning

confidence: 99%

AuPt nanoalloy with dual functionalities for sensitive detection of HPV16 DNA

Qian

Qiu

et al. 2023

RSC Adv.

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Improved hydrogen oxidation reaction under alkaline conditions by Au–Pt alloy nanoparticles

Cited by 27 publications

References 42 publications

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

Nano-Sized PtRu/C Electrocatalyst With Separated Phases and High Dispersion Improves Electrochemical Performance of Hydrogen Oxidation Reaction

AuPt nanoalloy with dual functionalities for sensitive detection of HPV16 DNA

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