Topological Engineering of Pt‐Group‐Metal‐Based Chiral Crystals toward High‐Efficiency Hydrogen Evolution Catalysts

Yang, Qun; Li, Guowei; Manna, Kaustuv; Fan, Fengren; Felser, Claudia; Sun, Yan

doi:10.1002/adma.201908518

Cited by 105 publications

(105 citation statements)

References 43 publications

(68 reference statements)

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“…As shown in Figure 2D, the bulk single crystals of Mn 2 CoGa, Co 2 MnGa, and Co 2 VGa exhibit high TOFs of 0.594, 1.2, and 1.475 s -1 , respectively, which are comparable to those of the most reported high-performance transition metal chalcogenide, phosphide, and nitride electrocatalysts. [41][42][43][44][45][46] This highlights the high intrinsic catalytic activities of Heusler family alloys as HER catalysts. In additional to the high catalytic activities is the excellent surface stability of these bulk single crystal catalysts.…”

Section: Electromechanical Her Assessment Of Heusler Single-crystal Catalystsmentioning

confidence: 90%

Magnetocatalysis: The Interplay between the Magnetic Field and Electrocatalysis

Yang

Manna

et al. 2021

CCS Chem

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Magnetic fields are known as clean, economic, and effective tools to modify band and magnetic structures of materials. When coupled with catalytic processes such as hydrogen evolution reaction (HER), it has the potential to control the catalytic efficiencies. However, the underlying mechanism of magneto-catalysis is poorly studied and little understood. Here, we studied the magnetic response of a series of materials as HER catalysts, specifically, ferromagnetic Co 2 VGa, Co 2 MnGa and Ni, ferrimagnetic Mn 2 CoGa, and paramagnetic Pt.We found all the Heusler compounds exhibit impressively high intrinsic activities. Most importantly, the presence of a magnetic field could change the HER efficiencies significantly, regardless of the magnetic states of the catalysts. We observed boosting HER kinetics for ferromagnetic Ni and paramagnetic Pt, and a decrease of efficiency for ferro/ferrimagnetic Heusler alloys. Our calculations suggest that the binding energy between the reaction intermediate and the catalyst can be tailored effectively by controlling the number of transferred electrons. The findings highlight the vital role of magnetic fields in tailoring heterogeneous catalytic reactions that involving adsorption of reactants.

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Section: Electromechanical Her Assessment Of Heusler Single-crystal Catalystsmentioning

confidence: 90%

Magnetocatalysis: The Interplay between the Magnetic Field and Electrocatalysis

Yang

Manna

et al. 2021

CCS Chem

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“…Hydrogen adsorption affinity is another crucial metric of electrocatalytic HER. [ 60–62 ] Generally, a moderate interaction is favorable since there is an intricate trade‐off between adsorption of hydrogen intermediate and desorption of hydrogen. [ 63 ] However, it is still challenging to achieve a hydrogen adsorption Gibbs free energy (Δ G H ) of 0 eV based on conventional strategies.…”

Section: Electric Field‐assisted Electrocatalytic Her/oermentioning

confidence: 99%

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

et al. 2020

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promising alternative to fossil fuels. Water electrolysis by renewable resourcederived electricity represents a facile and green route to produce H 2. [1-13] Generally, the key to implement high-performance water splitting is to develop economically viable, efficient, and robust electrocatalysts to lower the activation potential barriers. Thus far, researchers have devoted extensive enthusiasm to the investigation of electrocatalysts. Currently, most efforts have been taken on the search for new materials, [14-16] regulation of morphology, [17] crystallinity, [18] facet, [19] component, [20-24] defect, [25,26] matter phase, [27,28] or the compositing of various materials with synergy. [29-36] However, the performances of emerging nonnoble electrocatalysts still lag behind those of noble ones. To address this issue, researchers have turned their attention beyond the electrocatalysts themselves. Field-assisted electrocatalysis is the electrocatalytic reaction proceeded in the presence of a field. It represents a promising methodology since it exerts an additional degree of freedom to engineer an electrochemical process. Inspiringly, indisputable improvements in electrocatalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) have been implemented with the assist of various fields, including electric field, magnetic field, strain, and light. For example, the electrocatalytic HER of a MoS 2 nanosheet is markedly boosted by simply exploiting a back gate voltage of 5 V. [37] Its overpotential at −100 mA cm −2 is decreased from 240 to 38 mV. In addition, enhancement of alkaline water electrolysis is achieved by applying a moderate magnetic field (≤450 mT) to an electrocatalytic anode consists of highly magnetic electrocatalysts. [38] Its current density increments are beyond 100%. Furthermore, the HER activity of β-PdH x increases monotonically as the applied strain increases from 0% to 4.5%. [39] Lastly, an approximately threefold increase in current density of Au-MoS 2 for electrocatalytic HER is realized upon the illumination of IR light. [40] These results undoubtedly elucidate that applying a field during electrocataly sis opens up great opportunities toward further improving electrocatalytic activity. Moreover, this approach provides merits of facile, dynamical, continuous, reversible, and universal control. Despite fascinating achievements, these investigations are relatively scattered. The underneath mechanisms and principles Hydrogen fuel is considered as one of the most clean renewable resources, warranting it a primary alternative to fossil fuels for future energy supplies. Electrocatalytic water splitting is an eco-friendly technique for high-purity hydrogen production. However, the sluggish dynamics of its two halfreactions, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), are tough challenges impeding the practical application of this technology. In these years, external field-assisted HER and OER have attracted extensive research interests. Herein, the effects o...

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“…42,47,48 Chiral Fermions have ultralong chiral surface arcs, so called Fermi arcs, and are excellent materials for hydrogen evolution reaction. 46 Author information…”

Section: Outlook and Future Directionsmentioning

confidence: 99%

Topological Quantum Materials from the Viewpoint of Chemistry

et al. 2020

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Topology, a mathematical concept, has recently become a popular and truly transdisciplinary topic encompassing condensed matter physics, solid state chemistry, and materials science. Since there is a direct connection between real space, namely atoms, valence electrons, bonds and orbitals, and reciprocal space, namely bands and Fermi surfaces, via symmetry and topology, classifying topological materials within a single-particle picture is possible. Currently, most materials are classified as trivial insulators, semimetals and metals, or as topological insulators, Dirac and Weyl nodal-line semimetals, and topological metals. The key ingredients for topology are: certain symmetries, the inert pair effect of the outer electrons leading to inversion of the conduction and valence bands, and spin-orbit coupling. This review presents the topological concepts related to solids from the viewpoint of a solid-state chemist, summarizes techniques for growing single crystals, and describes basic physical property measurement techniques to characterize topological materials beyond their structure and provide examples of such materials. Finally, a brief outlook on the impact of topology in other areas of chemistry is provided at the end of the article.

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Topological Engineering of Pt‐Group‐Metal‐Based Chiral Crystals toward High‐Efficiency Hydrogen Evolution Catalysts

Cited by 105 publications

References 43 publications

Magnetocatalysis: The Interplay between the Magnetic Field and Electrocatalysis

Magnetocatalysis: The Interplay between the Magnetic Field and Electrocatalysis

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

Topological Quantum Materials from the Viewpoint of Chemistry

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