Efficient catalytic hydrogen generation by intermetallic platinum-lead nanostructures with highly tunable porous feature

E, Bin; Bu, Lingzheng; Shao, Qi; Li, Yujing; Huang, Xiaoqing

doi:10.1016/j.scib.2018.11.020

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…Similarly, the XRD spectrum of PtPb/C presents a negligible shift compared to that of Pt. This is because of the low content and uniform distribution of the Pb element; this phenomenon also exists in other works about Pt-based alloy materials. − Besides, the high angle annular dark field (HAADF) and the corresponding energy-dispersive X-ray spectroscopy (EDS) images (Figure S2) demonstrate the uniform distribution of the Pt and Pb elements. Furthermore, the mass ratio of Pt:Pb is about 2.2:1 (the ratio of S-PtPb/C is about 11.3:1 and that of L-PtPb/C is 0.9:1), which is acquired by ICP-MS characterization (Table S1).…”

Section: Resultsmentioning

confidence: 56%

Regulating Competitive Adsorption on Pt Nanoparticles by Introducing Pb to Expedite Hydrogen Production via Ammonia Oxidation

Jiang

Chen

et al. 2023

ACS Appl. Nano Mater.

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Ammonia with a high hydrogen content is an ideal hydrogen carrier due to its mature storage and transport system. Ammonia electrooxidation is one of the most promising technologies for green and economic H2 production. However, ammonia oxidation reaction (AOR) is limited to a narrow potential window due to the slow kinetics and the competitive adsorption between the reactant and Had/OHad on active sites. Herein, an ultra-small PtPb alloy nanocatalyst is synthesized for AOR by the facile one-step solvothermal method. Experimental results demonstrate that the electronic structure of Pt is regulated by the introduction of Pb, inhibiting the competitive adsorption on Pt sites. Therefore, it exhibits improved AOR activity with a peak current density of 191.2 mA mg–1 Pt at 10 mV s–1, which is 1.97 times that of Pt/C. The good performance is attributed to the high hydrogen evolution overpotential property of Pb and the strong p–d electron interaction of PtPb, which effectively modulates the adsorption/desorption of intermediates at the Pt site. Hence, this work proposes a simple and effective strategy for designing efficient AOR catalysts, promoting the development of H2 production by AOR.

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Section: Resultsmentioning

confidence: 56%

Regulating Competitive Adsorption on Pt Nanoparticles by Introducing Pb to Expedite Hydrogen Production via Ammonia Oxidation

Jiang

Chen

et al. 2023

ACS Appl. Nano Mater.

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“…Density functional theory calculations and experimental results prove that appropriate amount of lattice strain, crystal structure, and composition modification can tune the binding strength of reactant/product and enhance catalytic performance for certain catalysts . Pt‐based catalysts show efficient activities toward water–gas shift (WGS) reaction; oxygen reduction reaction (ORR); and methanol, ethanol, and CO oxidation …”

Section: Introductionmentioning

confidence: 99%

“…The poisoning of Pt surface by CO gas can be reduced by alloying with a second metal to modify its electronic structure . Researchers found that PtPb x catalyst was efficient in WGS reaction, where optimized CO adsorption strength ensured reaction activity and durability . An optimized Pt:Pb ratio can help reduce the poisoning effect and dramatically increase the lifetime of such catalysts .…”

Section: Introductionmentioning

confidence: 99%

CO Gas Induced Phase Separation in PtPb@Pt Catalyst and Formation of Ultrathin Pb Nanosheets Probed by In Situ Transmission Electron Microscopy

Wang

Zhao

2019

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PtPb@Pt catalysts are very useful and widely applied in various industrial reactions. Here, the phase stability of such catalysts is compared in both CO gas and vacuum conditions at elevated temperatures using aberration‐corrected in situ transmission electron microscopy (TEM). A Pt aggregation process takes place affected by CO gas, which results in direct exposure of the PtPb core to CO. A phase separation process, in which Pb atoms are stripped off the original PtPb@Pt nanoparticles, is unambiguously identified in CO gas. At initial stages, the as nucleated Pb islands are amorphous. Once the ultrathin Pb islands reach ≈3.5 nm or higher, they suddenly became crystalline. The interaction between Pb and CO gas stabilizes the ultrathin Pb nanosheets, resulting in the formation of a large quantity of Pb nanosheets and Pb‐depleted PtPb0.08 nanoparticles. In sharp contrast, when heated up in a vacuum, the PtPb@Pt catalyst remains intact. The results of this study shine light on the “toxic” effect of CO that results in failures of many Pt‐based catalysts and discloses formation mechanism of ultrathin Pb nanosheets.

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CO Gas Induced Phase Separation in PtPb@Pt Catalyst and Formation of Ultrathin Pb Nanosheets Probed by In Situ Transmission Electron Microscopy

Wang

Zhao

2019

Small

View full text Add to dashboard Cite

Efficient catalytic hydrogen generation by intermetallic platinum-lead nanostructures with highly tunable porous feature

Cited by 14 publications

References 32 publications

Regulating Competitive Adsorption on Pt Nanoparticles by Introducing Pb to Expedite Hydrogen Production via Ammonia Oxidation

Regulating Competitive Adsorption on Pt Nanoparticles by Introducing Pb to Expedite Hydrogen Production via Ammonia Oxidation

CO Gas Induced Phase Separation in PtPb@Pt Catalyst and Formation of Ultrathin Pb Nanosheets Probed by In Situ Transmission Electron Microscopy

CO Gas Induced Phase Separation in PtPb@Pt Catalyst and Formation of Ultrathin Pb Nanosheets Probed by In Situ Transmission Electron Microscopy

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