Strained lattice platinum–palladium alloy nanowires for efficient electrocatalysis

Ren, Mengyun; Chang, Fangfang; Miao, Ruifang; He, Xianhong; Yang, Lin; Wang, Xiaolei; Bai, Zhengyu

doi:10.1039/d0qi00094a

Cited by 20 publications

(8 citation statements)

References 43 publications

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“…The lattice fringes of Pt n Co 100−n fell in between Pt and Co, which was gradually increased, indicating that Co atoms successfully integrated into the Pt nanostructure. As the proportion of platinum increased, the morphology of the NWs was gradually thinned and terminated by the (111) facet, which was reported in our previous work [ 29 , 30 ].…”

Section: Resultssupporting

confidence: 77%

Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis

et al. 2023

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The compositions and surface facets of platinum (Pt)-based electrocatalysts are of great significance for the development of direct alcohol fuel cells (DAFCs). We reported an approach for preparing ultrathin PtnCo100−n nanowire (NW) catalysts with high activity. The PtnCo100−n NW alloy catalysts synthesized by single-phase surfactant-free synthesis have adjustable compositions and (111) plane and strain lattices. X-ray diffraction (XRD) results indicate that the alloy composition can adjust the lattice shrinkage or expansion of PtnCo100−n NWs. X-ray photoelectron spectroscopy (XPS) results show that the electron structure of Pt is changed by the alloying effect caused by electron modulation in the d band, and the chemical adsorption strength of Pt is decreased, thus the catalytic activity of Pt is increased. The experimental results show that the activity of PtnCo100−n for the oxidation of methanol and ethanol is related to the exposed crystal surface, strain lattice and composition of catalysts. The PtnCo100−n NWs exhibit stronger electrocatalytic performance for both methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). The dominant (111) plane Pt53Co47 exhibits the highest electrocatalytic activity in MOR, which is supported by the results of XPS. This discovery provides a new pathway to design high activity, stability nanocatalysts to enhance direct alcohol fuel cells.

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Section: Resultssupporting

confidence: 77%

Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis

et al. 2023

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“…S3, ESI†) for their electrochemical performance. With the increase in Pt% in the alloy nanowires, the morphology of the nanowires gradually became thinner than that reported in our previous work, 16,42–44 which was terminated by the (111)-type facets.…”

Section: Resultscontrasting

confidence: 61%

“…Secondly, active defects (e.g., grain boundaries and vacancies) are formed along the nanoalloy NWs and combined in contact to form networked structures. 42,43 Most importantly, the structural defects could improve the electrocatalytic activity of ORR. Fig.…”

Section: Morphology and Structure Of Nwsmentioning

confidence: 99%

Modulating the intrinsic properties of platinum–cobalt nanowires for enhanced electrocatalysis of the oxygen reduction reaction

et al. 2022

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“…Under the ligand effect, turning an appropriate balance between the oxygenated species and the adsorption of oxygen, is very meaningful for the excellent ORR activity. Chang et al reported distinguished enhancement of ORR activity and durability of the Pt-based nanowires (NWs) prepared by alloying Pd, Au, and Ni metal. − Kong et al uncovered the ligand effect of the twisty PtFe NWs with a low content of Pt (<25%), exhibiting the highest mass activity3.4 A/mg Pt , which is ∼20 times higher, relative to the commercial Pt catalyst, and just ∼2% loss of activity after 40 000 cycles . Wu et al revealed ternary composition alloy catalyst of a highly durable PtPdCu by alloying PtPd (<50%) with copper base metal.…”

Section: Advanced Platinum-based Electrocatalystsmentioning

confidence: 99%

Advanced Cathode Electrocatalysts for Fuel Cells: Understanding, Construction, and Application of Carbon-Based and Platinum-Based Nanomaterials

Kong

Zhang

et al. 2021

ACS Materials Lett.

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Proton-exchange-membrane fuel cells (PEMFCs) are one type of promising energy device with clean and high efficiency characteristics. The sluggish kinetic characteristics of cathode oxygen reduction reaction (ORR) are still the bottleneck of the crucial skill. Until now, the exploitation of high ORR performance nanocatalysts has been the most effective strategy to the commercial of PEMFCs. Hence, more attention is paid to preciously tuning the surface/interface electronic structure and optimizing the intermediate species of adsorption energy of nanocatalysts to improve the ORR performance. Herein, performance-construction engineering is introduced in terms of surface strain, defect site (adsorption site/coordination number effect), and crystal facet for Pt-based catalysts. The physical synergy between Pt-based and carbon-based catalysts is also systematically reported focusing on ordered and mesoporous carbon, physical encapsulated carbon, metal carbides, carbon-containing polymer, etc. for ORR mainly in acidic environment. The understanding, construction, and application of the ORR active sites combined the carbon-based and platinum-based catalysts are deeply concluded in low-temperature PEMFCs, as well as part of high-temperature PEMFCs under acidic environment. The doping strategy and the strong interaction are highlighted introduced to enhance the intrinsic activity and the apparent activity. Furthermore, to study the complex active sites of catalysts and the corresponding compositional and structural evolution, the structure− activity relationships are further depicted coupled with the existing advanced in situ characterization technology. Finally, the potential prospects and challenges for the two types of electrocatalysts are summarized to shed a new light for the development of ORR catalysts in commercial applications.

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Strained lattice platinum–palladium alloy nanowires for efficient electrocatalysis

Abstract: The ability to manipulate Pt-based alloy catalysts with controllable compositions and the type of surface facet is important for advancing direct alcohol fuel cells (DAFEs).

Cited by 20 publications

References 43 publications

Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis

Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis

Modulating the intrinsic properties of platinum–cobalt nanowires for enhanced electrocatalysis of the oxygen reduction reaction

Advanced Cathode Electrocatalysts for Fuel Cells: Understanding, Construction, and Application of Carbon-Based and Platinum-Based Nanomaterials

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