The self-complementary effect through strong orbital coupling in ultrathin high-entropy alloy nanowires boosting pH-universal multifunctional electrocatalysis

Li, Hongdong; Sun, Mingzi; Pan, Yue; Xiong, Juan; Du, Haoyang; Yu, Yaodong; Feng, Shouhua; Li, Zhenjiang; Lai, Jianping; Huang, Bolong; Wang, Lei

doi:10.1016/j.apcatb.2022.121431

Cited by 61 publications

(41 citation statements)

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“…[20][21][22][23][24] In addition, HEAs have also been confirmed as prospective electrocatalysts, which exhibit the synergistic effects between different metal elements and intensive catalytic performance. [20,[25][26][27][28][29][30][31] However, the current HEAs electrocatalysts reported are mainly low-dimensional. [26,[32][33][34] To further expose more active sites, it is significant to achieve the HEAs with unique 3D structure, but it still remains a formidable challenge.…”

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confidence: 99%

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High‐Entropy Alloy Aerogels: A New Platform for Carbon Dioxide Reduction

Huang

Chen

et al. 2022

Advanced Materials

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High‐entropy alloy aerogels (HEAAs) combined with the advantages of high‐entropy alloys and aerogels are prospective new platforms in catalytic reactions. However, due to the differences in reduction potentials and miscibility behavior of different metals, the realization of HEAAs with a single phase is still a great challenge. Herein, a series of HEAAs is fabricated via the freeze–thaw method as highly active and durable electrocatalysts for the carbon dioxide reduction reaction (CO2RR). Especially, the PdCuAuAgBiIn HEAAs can achieve Faradaic efficiency (FE) of C1 products almost 100% from −0.7 to −1.1 V versus reversible hydrogen electrode (VRHE), and a maximum FE for formic acid (FEHCOOH) of 98.1% at −1.1 VRHE, outperforming PdCuAuAgBiIn high‐entropy alloy particles (HEAPs) and Pd metallic aerogels (MAs). Specifically, the current density and FEHCOOH are almost 200 mA cm−2 and 87% in a flow cell. The impressive CO2RR performance of the PdCuAuAgBiIn HEAAs is attributed to the strong interactions between the different metals and the surface unsaturated sites, which can regulate the electronic structures of different metals and allow the optimal HCOO* intermediate adsorption and desorption onto the catalysts surface to enhance HCOOH production. The work not only provides a facile synthetic strategy to fabricate HEAAs, but also opens the avenue for development of efficient catalysts and beyond.

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confidence: 99%

“…[20,[25][26][27][28][29][30][31] However, the current HEAs electrocatalysts reported are mainly low-dimensional. [26,[32][33][34] To further expose more active sites, it is significant to achieve the HEAs with unique 3D structure, but it still remains a formidable challenge. Metallic aerogels (MAs) are a kind of 3D self-supported solid network.…”

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confidence: 99%

High‐Entropy Alloy Aerogels: A New Platform for Carbon Dioxide Reduction

Huang

Chen

et al. 2022

Advanced Materials

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“…Several researchers have made great efforts in the theoretical or experimental understanding of HEA catalysts, which helped identify the active catalytic sites and HEA surfaces. [136][137][138][139][140][141][142][143] For example, Hao and coworkers [144] greatly improved the efficiency of water dissociation in alkaline conditions by designing a high entropy alloy system of FeCoNiXRu (X: Cu, Cr and Mn) with different active sites. It is proved by density functional theory (DFT) calculation, Gibbs free energy (ΔG H* ) calculation and electrochemical Raman spectra that the Co site promotes the dissociation of H 2 O and the Ru site simultaneously accelerates the binding of H* to H 2 in a typical FeCoNiMnRu HEA.…”

Section: Discussionmentioning

confidence: 99%

Review of High Entropy Alloys Electrocatalysts for Hydrogen Evolution, Oxygen Evolution, and Oxygen Reduction Reaction

Huo

Xing

et al. 2022

The Chemical Record

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Recently, high-entropy alloys (HEAs) have been extensively investigated due to their unique structural design, superior stability, excellent functional feature and superior mechanical performance. However, most of the reported HEAs focus on studying the compositional design and microstructure and mechanical properties of materials. There are relatively few studies on electrochemical performance and theoretical studies of HEAs. In addition, the potential applications of HEAs as energy storage materials for electrocatalysts have attracted widely attention in the development and application aspects of electrocatalysis. It can be attributed to their high conductivity, excellent structural stability and superior electrocatalytic activities with small overpotential and abundant active sites, which is comparable to the commercial noble metal catalysts. In this review, firstly, we briefly discuss the concept and structure characteristics of high entropy alloys. Then, the research progress of high-entropy alloys as electrocatalysis are also summarized, including hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), respectively. Finally, the future development trend of HEAs is also prospected for energy conversion fields.

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“…22c–e). 207 The PtCoNiCuRu HEA 3D nanoframework synthesized by spray drying combined with the thermal decomposition reduction technique has a specific area of 94.9 m 2 g −1 . 208…”

Section: High-entropy Alloymentioning

confidence: 99%

“…22c-e). 207 The PtCoNiCuRu HEA 3D nanoframework synthesized by spray drying combined with the thermal decomposition reduction technique has a specific area of 94.9 m 2 g −1 . 208 The supported electrode enables the catalyst to be fully exposed to the electrolyte and facilitates the diffusion of the generated hydrogen.…”

Section: Heas For Her Applicationsmentioning

confidence: 99%