Tuning metal-support interaction of Pt-based electrocatalysts for hydrogen energy conversion

Li, Shenzhou; Wang, Tanyuan; Li, Qing

doi:10.1007/s11426-023-1760-x

Cited by 6 publications

(1 citation statement)

References 142 publications

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“…Similar induction conditions make the occurrence of RMSI in metal–metal oxide systems often accompanied by cSMSI, which is often detrimental to catalytic activity. To avoid concomitant cSMSI, nonmetal oxide supports, such as Mxene, S-doped graphene, and Co–N–C, have been reported to induce RMSI. − At present, RMSI can be only induced by the thermal reduction method, and the onset temperature of RMSI is affected by both properties of the metal NPs and reducibility of the supports. − For instance, Shen et al found that the larger size of Pt NPs requires a higher onset temperature to form Pt 3 Ti alloy on TiO 2 . Besides, RMSI can also take place at a lower temperature when the supports are more easily to be reduced, for instance, the temperature required for RMSI in Pd–Ga 2 O 3 and Pt–ZnO systems is 250 and 500 °C, respectively.…”

Section: Introductionmentioning

confidence: 99%

Constructing Gradient Orbital Coupling to Induce Reactive Metal–Support Interaction in Pt-Carbide Electrocatalysts for Efficient Methanol Oxidation

Li,

Wang,

et al. 2024

J. Am. Chem. Soc.

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Reactive metal−support interaction (RMSI) is an emerging way to regulate the catalytic performance for supported metal catalysts. However, the induction of RMSI by the thermal reduction is often accompanied by the encapsulation effect on metals, which limits the mechanism research and applications of RMSI. In this work, a gradient orbital coupling construction strategy was successfully developed to induce RMSI in Pt-carbide system without a reductant, leading to the formation of L1 2 -Pt x M-MC y (M = Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W) intermetallic electrocatalysts. Density functional theory (DFT) calculations suggest that the gradient coupling of the d(M)-2p(C)-5d(Pt) orbital would induce the electron transfer from M to C covalent bonds to Pt NPs, which facilitates the formation of C vacancy (C v ) and the subsequent M migration (occurrence of RMSI). Moreover, the good correlation between the formation energy of C v and the onset temperature of RMSI in Pt-MC x systems proves the key role of nonmetallic atomic vacancy formation for inducing RMSI. The developed L1 2 -Pt 3 Ti-TiC catalyst exhibits excellent acidic methanol oxidation reaction activity, with mass activity of 2.36 A mg Pt −1 in half-cell and a peak power density of 187.9 mW mg Pt −1 in a direct methanol fuel cell, which is one of the best catalysts ever reported. DFT calculations reveal that L1 2 -Pt 3 Ti-TiC favorably weakens *CO absorption compared to Pt-TiC due to the change of the absorption site from Pt to Ti, which accounts for the enhanced MOR performance.

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Section: Introductionmentioning

confidence: 99%

Constructing Gradient Orbital Coupling to Induce Reactive Metal–Support Interaction in Pt-Carbide Electrocatalysts for Efficient Methanol Oxidation

Li,

Wang,

et al. 2024

J. Am. Chem. Soc.

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Integration Construction of Hybrid Electrocatalysts for Oxygen Reduction

Huang,

Niu,

Xia

et al. 2024

Advanced Materials

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There is notable progress in the development of efficient oxygen reduction electrocatalysts, which are crucial components of fuel cells. However, these superior activities are limited by imbalanced mass transport and cannot be fully reflected in actual fuel cell applications. Herein, the design concepts and development tracks of platinum (Pt)‐nanocarbon hybrid catalysts, aiming to enhance the performance of both cathodic electrocatalysts and fuel cells, are presented. This review commences with an introduction to Pt/C catalysts, highlighting the diverse architectures developed to date, with particular emphasis on heteroatom modification and microstructure construction of functionalized nanocarbons based on integrated design concepts. This discussion encompasses the structural evolution, property enhancement, and catalytic mechanisms of Pt/C‐based catalysts, including rational preparation recipes, superior activity, strong stability, robust metal‐support interactions, adsorption regulation, synergistic pathways, confinement strategies, ionomer optimization, mass transport permission, multidimensional construction, and reactor upgrading. Furthermore, this review explores the low‐barrier or barrier‐free mass exchange interfaces and channels achieved through the impressive multidimensional construction of Pt‐nanocarbon integrated catalysts, with the goal of optimizing fuel cell efficiency. In conclusion, this review outlines the challenges associated with Pt‐nanocarbon integrated catalysts and provides perspectives on the future development trends of fuel cells and beyond.

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Cation-π interactions regulate electrocatalytic water oxidation over iridium single atoms supported on conjugated polymers

Bai,

Liu,

et al. 2024

Sci. China Chem.

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Tuning metal-support interaction of Pt-based electrocatalysts for hydrogen energy conversion

Cited by 6 publications

References 142 publications

Constructing Gradient Orbital Coupling to Induce Reactive Metal–Support Interaction in Pt-Carbide Electrocatalysts for Efficient Methanol Oxidation

Constructing Gradient Orbital Coupling to Induce Reactive Metal–Support Interaction in Pt-Carbide Electrocatalysts for Efficient Methanol Oxidation

Integration Construction of Hybrid Electrocatalysts for Oxygen Reduction

Cation-π interactions regulate electrocatalytic water oxidation over iridium single atoms supported on conjugated polymers

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