Exploring the impact of atomic lattice deformation on oxygen evolution reactions based on a sub-5 nm pure face-centred cubic high-entropy alloy electrocatalyst

Huang, Kang; Zhang, Bowei; Wu, Junsheng; Zhang, Tianyuan; Peng, Dongdong; Cao, Xun; Zhang, Zhan; Li, Zhong; Huang, Yizhong

doi:10.1039/d0ta02125c

Cited by 156 publications

(102 citation statements)

References 46 publications

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“…The alloy contains five or more elements which have similar atomic ratios 16,17 . The atomic size of each component is different, which can cause lattice distortion 18 . Besides, the presence of multiple components is conducive to promoting the formation of the solid solution phase and inhibiting the movement of dislocations.…”

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confidence: 99%

Fast site-to-site electron transfer of high-entropy alloy nanocatalyst driving redox electrocatalysis

et al. 2020

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Designing electrocatalysts with high-performance for both reduction and oxidation reactions faces severe challenges. Here, the uniform and ultrasmall (~3.4 nm) high-entropy alloys (HEAs) Pt18Ni26Fe15Co14Cu27 nanoparticles are synthesized by a simple low-temperature oil phase strategy at atmospheric pressure. The Pt18Ni26Fe15Co14Cu27/C catalyst exhibits excellent electrocatalytic performance for hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR). The catalyst shows ultrasmall overpotential of 11 mV at the current density of 10 mA cm−2, excellent activity (10.96 A mg−1Pt at −0.07 V vs. reversible hydrogen electrode) and stability in the alkaline medium. Furthermore, it is also the efficient catalyst (15.04 A mg−1Pt) ever reported for MOR in alkaline solution. Periodic DFT calculations confirm the multi-active sites for both HER and MOR on the HEA surface as the key factor for both proton and intermediate transformation. Meanwhile, the construction of HEA surfaces supplies the fast site-to-site electron transfer for both reduction and oxidation processes.

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confidence: 99%

Fast site-to-site electron transfer of high-entropy alloy nanocatalyst driving redox electrocatalysis

et al. 2020

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“…In conclusion, we have synthesized the uniform and small size Pt 18 − 1 Pt at -0.07 V vs. RHE) and stability for HER, which is one of the best HER activity in alkaline medium. And it is also the effective catalysts for MOR and displayed the excellent activity (15.04 A mg − 1 Pt ) and better CO anti-poisoning in alkaline solution, which is the best alkaline MOR activity among the ever-reported.…”

Section: Resultsmentioning

confidence: 90%

“…16,17 The atomic size of each component is different, which can cause lattice distortion. 18 Besides, the presence of multiple components is conducive to promoting the formation of solid solution phase and inhibiting the movement of dislocations. These characteristics of HEA lead to some unique characteristics, such as strong fracture toughness, corrosion resistance and high mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Fast Site-to-site Electron Transfer of High-entropy Alloy Nanocatalyst Driving Redox Electrocatalysis

Han

Zhao

et al. 2020

Preprint

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Designing electrocatalysts with high-performance for both reduction and oxidation reactions faces severe challenges. Here, the uniform and small size (~3.4 nm) high-entropy alloys (HEAs) Pt18Ni26Fe15Co14Cu27 nanoparticles (NPs) are synthesized by a simple low-temperature (<250 oC) oil phase synthesis strategy at atmospheric pressure for the first time. The Pt18Ni26Fe15Co14Cu27/C catalyst exhibits excellent electrocatalytic performance for hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR). The catalyst is one of the best performance achieved by state-of-the-art alkaline HER catalysts, which shows an ultrasmall overpotential of 11 mV at the current density of 10 mA cm-2, excellent activity (10.96 A mg-1Pt at -0.07 V vs. reversible hydrogen electrode) and stability in the alkaline medium. Furthermore, it is also the most efficient catalyst (15.04 A mg-1Pt) ever reported for MOR in alkaline solution. DFT calculations confirm the multi-active sites for both HER and MOR on the HEA surface as the key factor for both proton and intermediate transformation. Meanwhile, the construction of HEA surfaces supplies the fast site-to-site electron transfer for both reduction and oxidation processes.

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“…In particular, through judiciously manipulating the inherent vastness of the composition space of HEA−NPs, these revolutionary novel materials provide a promising platform for catalyst discovery [31] . The catalytic use of nanosized HEAs have been explored in thermal and electrochemical reactions, including ammonia decomposition and oxidation, carbon dioxide reduction reaction, oxygen evolution and reduction, hydrogen evolution, and so on [21,32–36] . Theoretical studies have provided a deeper insight of the HEAs in terms of phase formation and the structure‐activity relationship [37–39] .…”

Section: Introductionmentioning

confidence: 99%

The Synthesis and Catalytic Applications of Nanosized High‐Entropy Alloys

et al. 2020

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Creative approaches towards the fabrication of metal nanomaterials for catalysis are highly demanded. In this context, integrating multiple elements into single nanosized alloys opens up a new route for tailoring catalytic performance. Particularly, nanosized high‐entropy alloys (HEAs) with five or more metallic components have emerged as a new platform for catalyst discovery in broad cases, such as ammonia decomposition, ammonia oxidation, and various electrochemical reactions. In this minireview, the vigorous current activity on the synthesis of HEAs nanoparticles (NPs) and their catalytic applications have been summarized. Theoretically, the rational design of heterogeneous HEAs catalysts has also been briefly discussed.

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Exploring the impact of atomic lattice deformation on oxygen evolution reactions based on a sub-5 nm pure face-centred cubic high-entropy alloy electrocatalyst

Abstract: Multimetal high-entropy alloys (HEAs) have been recognized as potential catalysts that can possibly replace the conventional metal oxides and noble metals for use in energy conversion and water splitting such as oxygen evolution reactions (OERs).

Cited by 156 publications

References 46 publications

Fast site-to-site electron transfer of high-entropy alloy nanocatalyst driving redox electrocatalysis

Fast site-to-site electron transfer of high-entropy alloy nanocatalyst driving redox electrocatalysis

Fast Site-to-site Electron Transfer of High-entropy Alloy Nanocatalyst Driving Redox Electrocatalysis

The Synthesis and Catalytic Applications of Nanosized High‐Entropy Alloys

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