Atomic-scaled surface engineering Ni-Pt nanoalloys towards enhanced catalytic efficiency for methanol oxidation reaction

Shan, Aixian; Huang, Shuoyuan; Zhao, Hai-Ming; Jiang, Wen-Gui; Teng, Xueai; Huang, Yufeng; Chen, Chinping; Wang, Rongming; Lau, Woon‐Ming

doi:10.1007/s12274-020-2978-3

Cited by 54 publications

(25 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where Q H (mC) is the total charge due to the hydrogen adsorption/desorption, 0.21 is the required charge of monolayer adsorption of hydrogen on Pt, and W pt represents the loading mass of Pt on the electrode [56] . The ECSA values of Pt‐CuCoO 2 ‐100/C were evaluated to be 36.76 m 2 g −1 , slightly lower than the value of Pt‐CuCoO 2 ‐180/C (38.57 m 2 g −1 ), which may be due to its relatively larger particle size.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

et al. 2022

View full text Add to dashboard Cite

Nowadays, the high cost and poor durability of commercial catalyst Pt/C for methanol oxidation reaction have impeded the further development of direct methanol fuel cells. Herein, we firstly introduced a delafossite CuCoO2 to act as the support of noble metal Pt. The strong metal support interaction between Pt and CuCoO2, abundant hydroxide species and active sites on the surface of catalyst may be the key factors for enhanced performances of methanol oxidation. Pt‐CuCoO2/C achieved a mass activity of 1.16 A mgPt−1, which obtained 3.02 times enhancement compared with commercial Pt/C (0.38 A mgPt−1). The If/Ib value of Pt‐CuCoO2/C is 1.96, much higher than that of Pt/C (0.76), demonstrating favorable anti‐poisoning ability. After 200 times cycling, Pt‐CuCoO2/C still maintained 77.1 % of its initial activity, exhibiting superior COads intermediate tolerance and stability. Low cost, better performances and stability of Pt‐CuCoO2/C reveal that it can be seen as a hopeful catalyst.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The fourth form of the strain has been found in a bimetallic alloy when a different atom (e.g., with a small atomic number) is doped into the surface of the main metal (Figure 7a). [105,106] Due to the size difference of the main atom from the doped atom (or dopant), the surface atom-atom distance is expected to be changed, leading to the formation of localized lattice strain. For example, when a Cu film is exposed into an AgNO 3 solution, the galvanically replacement/reaction occurs.…”

Section: Strain In Alloymentioning

confidence: 99%

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Yang

Wang

Tong

et al. 2021

Advanced Energy Materials

115

View full text Add to dashboard Cite

sive utilization of fossil fuels. The design and development of efficient, economic, and sustainable strategies to convert clean energy (e.g., solar energy, wind energy, and hydropower energy) is thus of great significance. Among various available strategies, electrochemical energy conversion technologies have been attracted extreme attention. They mainly include (photo)electrochemical reduction of atmosphere-rich and greenhouse gas-carbon dioxideinto high value-added chemicals or liquid fuels under mild reaction conditions, electrosynthesis of NH 3 with low energy consumption to substitute the Haber method, electrochemical overall water splitting, and different kinds of fuel cells. By use of these electrochemical energy conversion technologies, it is believed that both the issues of energy shortage and environmental pollution are promising to be solved, eventually creating a globalized system with a sustainable energy circle for our society in the future (Figure 1). [1][2][3][4][5][6][7] To achieve efficient electrochemical conversion technologies, high-performance electrochemical conversion platforms need to be initialized, where electrocatalysts are frequently required. An electrocatalyst actually plays a vital role in the determination and further improvement of reaction rate, efficiency, and selectivity of different electrochemical transformations. In terms of its catalytic performance, the most crucial factors are generally considered as the amount of its active sites, the intrinsic activity of each active site, and the total efficiency of these active sites. [8] It is well-known that the amount of active sites of an electrocatalyst and its electrocatalytic efficiency can be increased through enlarging the surface area of an electrocatalyst, for example by means of synthesizing a nanostructured catalyst (e.g., nanosheets, [9] nanowires, [10] nanopores, [11][12][13] and coreshell structures [14,15] ). Meanwhile, the intrinsic activity of each catalytic site basically follows the Sabatier principle, [16][17][18][19][20] which is closely related to the ability of an electrocatalyst to weaken or strengthen the binding energies with reactants, reaction intermediates, and/or products. For example, when the free energy of hydrogen adsorption (ΔG H ) on the active sites of an electrocatalyst remains at a moderate strength, this catalyst exhibits the highest catalytic activity toward hydrogen evolution reaction (HER). In contrast, too strong or too weak ΔG H on the active sites of an electrocatalyst precludes the HER. [21][22][23] Among numerous electrocatalysts, multiple metal components based electrocatalysts have been extensively utilized in Strain engineering of nanomaterials, namely, designing, tuning, or controlling surface strains of nanomaterials is an effective strategy to achieve outstanding performance in different nanomaterials for their various applications. This article summarizes recent progress and achievements in the development of strain-rich electrocatalysts (SREs) and their applications in the fi...

show abstract

“…To date, Pd, Zn, Co, Ag, Mn, Au, Sn, Ru, Cu, and so forth have been incorporated into the Pt matrix. − Furthermore, the introduction of oxophilic metals can also facilitate the removal or oxidation of poisoning CO intermediates formed on the Pt surface, − leading to enhancement in both the activity and stability. Based on the alloys, multimetals offer a good opportunity to optimize their catalytic properties via varying their atomic ordering. , Apart from the alloy composition, morphology engineering of the Pt-based electrocatalysts serves as another powerful method to booster their catalytic performances. − Among various nanocrystals available, the metal nanostructures with a porous architecture have received great attention in electrocatalysis due to their large surface area and thus abundant active sites during catalytic reactions. − Moreover, the Ostwald ripening effect can be suppressed owing to the interconnected structures existing in the porous nanostructures, leading to a high electrocatalytic performance . Furthermore, the active sites can be further increased if the size of each branch in porous metal nanocrystals is quite small (<5 nm).…”

Section: Introductionmentioning

confidence: 99%

Ultrathin and Porous 2D PtPdCu Nanoalloys as High-Performance Multifunctional Electrocatalysts for Various Alcohol Oxidation Reactions

Fang

Jiang

et al. 2022

Inorg. Chem.

View full text Add to dashboard Cite

We precisely synthesized two-dimensional (2D) PtPdCu nanostructures with the morphology varying from porous circular nanodisks (CNDs) and triangular nanoplates (TNPs) to triangular nanoboomerangs (TNBs) by tuning the molar ratios of metal precursors. The PtPdCu trimetallic nanoalloys exhibit superior electrocatalytic performances to alcohol oxidation reactions due to their unique structural features and the synergistic effect. Impressively, PtPdCu TNBs exhibit a high mass activity of 3.42 mgPt+Pd –1 and 1.06 A·mgPt –1 for ethanol and methanol oxidation compared to PtPd, PtCu, and pure Pt, which is 3.93 and 4.07 times that of commercial Pt/C catalysts, respectively. Moreover, 2D PtPdCu TNPs and PtPdCu CNDs also show a highly improved electrocatalytic activity. Furthermore, as all-in-one electrocatalysts, PtPdCu nanoalloys display excellent electrocatalytic activity and stability toward the oxidation of other alcohol molecules, such as isopropyl alcohol, glycerol, and ethylene glycol. The enhanced mechanism was well proposed to be the abundant active sites and upshifted d-band center based on density functional theory calculations.

show abstract

Atomic-scaled surface engineering Ni-Pt nanoalloys towards enhanced catalytic efficiency for methanol oxidation reaction

Cited by 54 publications

References 54 publications

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Ultrathin and Porous 2D PtPdCu Nanoalloys as High-Performance Multifunctional Electrocatalysts for Various Alcohol Oxidation Reactions

Contact Info

Product

Resources

About

Atomic-scaled surface engineering Ni-Pt nanoalloys towards enhanced catalytic efficiency for methanol oxidation reaction

Cited by 54 publications

References 54 publications

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO2 on Carbon

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO2 on Carbon

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Ultrathin and Porous 2D PtPdCu Nanoalloys as High-Performance Multifunctional Electrocatalysts for Various Alcohol Oxidation Reactions

Contact Info

Product

Resources

About

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon