A Highly Efficient and Self‐Stabilizing Metallic‐Glass Catalyst for Electrochemical Hydrogen Generation

Hu, Yuan; Wang, Yi Zhi; Su, Rui; Cao, Cheng; Fan, Li; Sun, Chunwen; Yang, Yong; Guan, Peng; Ding, Da; Wang, Zhong Lin; Wang, Wei Hua

doi:10.1002/adma.201603880

Cited by 212 publications

(104 citation statements)

References 39 publications

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“…The surface of amorphous alloy has more unsaturated coordination, which can provide more active sites for chemical reactions. With theoretical calculations, Hu [34] pointed out that the bonding mechanism of atoms in amorphous structure was different from the case in crystalline structure. The excellent catalytic activity of amorphous electrodes resulted from the abundance of the active sites induced by the special electronic structure.…”

Section: Resultsmentioning

confidence: 99%

Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe85.2B10-14P0-4Cu0.8 Alloys

Dan

et al. 2017

Nanomaterials

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Nanoporous electrodes have been fabricated by selectively dissolving the less noble α-Fe crystalline phase from nanocrystalline Fe85.2B14–xPxCu0.8 alloys (x= 0, 2, 4 at.%). The preferential dissolution is triggered by the weaker electrochemical stability of α-Fe nanocrystals than amorphous phase. The final nanoporous structure is mainly composed of amorphous residual phase and minor undissolved α-Fe crystals and can be predicted from initial microstructure of nanocrystalline precursor alloys. The structural inheritance is proved by the similarity of the size and outlines between nanopores formed after dealloying in 0.1 M H2SO4 and α-Fe nanocrystals precipitated after annealing of amorphous Fe85.2B14−xPxCu0.8 (x = 0, 2, 4 at.%) alloys. The Redox peak current density of the nanoporous electrodes obtained from nanocrystalline Fe85.2B10P4Cu0.8 alloys is more than one order higher than those of Fe plate electrode and its counterpart nanocrystalline alloys due to the large surface area and nearly-amorphous nature of ligaments.

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Section: Resultsmentioning

confidence: 99%

Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe85.2B10-14P0-4Cu0.8 Alloys

Dan

et al. 2017

Nanomaterials

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“…[18,19] To date, numerous nanoporous materials, especially nanoporous transition metals and their oxides, have been reported for efficient catalysts toward HER in alkaline electrolyte. [26][27][28][29] Nevertheless, the HER properties of these MG electrocatalysts are mostly determined in acid, and the low surface area of MG ribbons also limits their electrocatalytic activity. More recently, metallic glass (MG) ribbons with good mechanical flexibility have been suggested to be active electrocatalysts for HER due to their metastable state and richness of low-coordination sites at the surface.…”

Section: Doi: 101002/adma201904989mentioning

confidence: 99%

Flexible Honeycombed Nanoporous/Glassy Hybrid for Efficient Electrocatalytic Hydrogen Generation

Liu

et al. 2019

Advanced Materials

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Hydrogen evolution reaction (HER) in alkaline media urgently requires electrocatalysts concurrently possessing excellent activity, flexible free‐standing capability, and low cost. A honeycombed nanoporous/glassy sandwich structure fabricated through dealloying metallic glass (MG) is reported. This free‐standing hybrid shows outstanding HER performance with a very small overpotential of 37 mV at 10 mA cm−2 and a low Tafel slope of 30 mV dec−1 in alkaline media, outperforming commercial Pt/C. By alloying 3 at% Pt into the MG precursor, a honeycombed Pt75Ni25 solid solution nanoporous structure, with fertile active sites and large contact areas for efficient HER, is created on the dealloyed MG surface. Meanwhile, the surface compressive lattice‐strain effect is also introduced by substituting the Pt lattice sites with the smaller Ni atoms, which can effectively reduce the hydrogen adsorption energy and thus improve the hydrogen evolution. Moreover, the outstanding stability and flexibility stemming from the ductile MG matrix also make the hybrid suitable for practical electrode application. This work not only offers a reliable strategy to develop cost‐effective and flexible multicomponent catalysts with low Pt usage for efficient HER, but also sheds light on understanding the alloying effects of the catalytic process.

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“…Many excellent research outcomes have demonstrated that MGs with several intrinsic catalytic advantages, such as widely tunable atomic components accompanied by fine tuning of electronic properties to satisfy catalytic selectivity demands, homogeneous and isotropic characteristics affording abundant catalytic active sites, the high density of unsaturated atomic coordination offering superior catalytic performance, etc., present great potential in practical catalytic applications. For example, recent reports have demonstrated that Pd–Ni–Cu–P MGs with intrinsic chemical heterogeneity and a selective dealloying function present a highly efficient and self‐optimized behavior for the hydrogen evolution reaction . Pt–Ni–Cu and Pt–Ni–Cu–P MGs, with precise regulation of surface elemental composition, exhibit highly active and durable performance in various catalytic applications.…”

Section: Introductionmentioning

confidence: 99%

Attractive In Situ Self‐Reconstructed Hierarchical Gradient Structure of Metallic Glass for High Efficiency and Remarkable Stability in Catalytic Performance

Jia

Wang

Sun

et al. 2019

Adv Funct Materials

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Metallic glass (MG), with the superiorities of unique disordered atomic structure and intrinsic chemical heterogeneity, is a new promising and competitive member in the family of environmental catalysts. However, what is at stake for MG catalysts is that their high catalytic efficiency is always accompanied by low stability and the disordered atomic configurations, as well as the structural evolution, related to catalytic performance, which raises a primary obstacle for their widespread applications. Herein, a non-noble and multicomponent Fe 83 Si 2 B 11 P 3 C 1 MG catalyst that presents a fascinating catalytic efficiency while maintaining remarkable stability for wastewater remediation is developed. Results indicate that the excellent efficiency of the MG catalysts is ascribed to a unique atomic coordination that causes an electronic delocalization with an enhanced electron transfer. More importantly, the in situ selfreconstructed hierarchical gradient structure, which comprises a top porous sponge layer and a thin amorphous oxide interfacial layer encapsulating the MG surface, provides matrix protection together with high permeability and more active sites. This work uncovers a new strategy for designing high-performance non-noble metallic catalysts with respect to structural evolution and alteration of electronic properties, establishing a solid foundation in widespread catalytic applications.

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A Highly Efficient and Self‐Stabilizing Metallic‐Glass Catalyst for Electrochemical Hydrogen Generation

Cited by 212 publications

References 39 publications

Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe85.2B10-14P0-4Cu0.8 Alloys

Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe85.2B10-14P0-4Cu0.8 Alloys

Flexible Honeycombed Nanoporous/Glassy Hybrid for Efficient Electrocatalytic Hydrogen Generation

Attractive In Situ Self‐Reconstructed Hierarchical Gradient Structure of Metallic Glass for High Efficiency and Remarkable Stability in Catalytic Performance

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