Discovering superior basal plane active two-dimensional catalysts for hydrogen evolution

Zhang, Jing; Wu, Jingjie; Zou, Xiaolong; Hackenberg, Ken P.; Zhou, Wu; Chen, Weibing; Yuan, Jiangtan; Keyshar, Kunttal; Gupta, Gautam; Mohite, Aditya; Ajayan, Pulickel M.

doi:10.1016/j.mattod.2019.02.014

Cited by 65 publications

(99 citation statements)

References 29 publications

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“…Similar effects have been previously observed in electrocatalysts based on metallic TMDCs, such as TaS 2 and NbS 2 nanosheets, as well as in other 2D material‐based electrodes, including graphene‐based electrocatalysts . In fact, the mechanical stresses originated by H 2 bubbling can cause a re‐orientation/fragmentation of the 2D electrocatalysts, which, consequently, shows higher electrochemically accessible surface area . Moreover, such mechanical stresses occasionally caused the formation of cracks in the active material films, as observed by SEM image analysis of additional electrodes (Figure S13, Supporting Information).…”

Section: Resultssupporting

confidence: 79%

“…For example, in acidic media some electrodes reported an increase of the initial HER‐activity over 24 h, achieving a ƞ 0 = 0.162 V versus RHE (see Figure S14a in the Supporting Information). This behavior might be attributed to the progressive increase of the H + accessibility to the HER‐active sites of the electrodes . In alkaline media, the electrodes often displayed an increase of the electrical resistance (e.g., from 4.4 to 45.9 Ω, measured by single frequency EIS), which caused a decrease of 21.5% of the initial current density (see Figure S14b, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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Extending the Colloidal Transition Metal Dichalcogenide Library to ReS₂ Nanosheets for Application in Gas Sensing and Electrocatalysis

Martín‐García

Spirito

Bellani

et al. 2019

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Among the large family of transition metal dichalcogenides, recently ReS2 has stood out due to its nearly layer‐independent optoelectronic and physicochemical properties related to its 1T distorted octahedral structure. This structure leads to strong in‐plane anisotropy, and the presence of active sites at its surface makes ReS2 interesting for gas sensing and catalysts applications. However, current fabrication methods use chemical or physical vapor deposition (CVD or PVD) processes that are costly, time‐consuming and complex, therefore limiting its large‐scale production and exploitation. To address this issue, a colloidal synthesis approach is developed, which allows the production of ReS2 at temperatures below 360 °C and with reaction times shorter than 2h. By combining the solution‐based synthesis with surface functionalization strategies, the feasibility of colloidal ReS2 nanosheet films for sensing different gases is demonstrated with highly competitive performance in comparison with devices built with CVD‐grown ReS2 and MoS2. In addition, the integration of the ReS2 nanosheet films in assemblies together with carbon nanotubes allows to fabricate electrodes for electrocatalysis for H2 production in both acid and alkaline conditions. Results from proof‐of‐principle devices show an electrocatalytic overpotential competitive with devices based on ReS2 produced by CVD, and even with MoS2, WS2, and MoSe2 electrocatalysts.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Extending the Colloidal Transition Metal Dichalcogenide Library to ReS₂ Nanosheets for Application in Gas Sensing and Electrocatalysis

Martín‐García

Spirito

Bellani

et al. 2019

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“…Hydrogen production from electrochemical water splitting is regarded as a promising approach to mitigate the dependence on fossil fuels . To date, many non‐Pt catalysts with Pt‐comparable hydrogen evolution reaction (HER) activity in acidic medium have been reported . However, the development of Pt‐free electrocatalysts for alkaline HER is still challenging due to their sluggish reaction kinetics of water activation, but appealing .…”

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confidence: 99%

Achieving Efficient Alkaline Hydrogen Evolution Reaction over a Ni₅P₄ Catalyst Incorporating Single‐Atomic Ru Sites

et al. 2020

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Developing efficient electrocatalysts for alkaline water electrolysis is central to substantial progress of alkaline hydrogen production. Herein, a Ni5P4 electrocatalyst incorporating single‐atom Ru (Ni5P4‐Ru) is synthesized through the filling of Ru3+ species into the metal vacancies of nickel hydroxides and subsequent phosphorization treatment. Electron paramagnetic resonance spectroscopy, X‐ray‐based measurements, and electron microscopy observations confirm the strong interaction between the nickel‐vacancy defect and Ru cation, resulting in more than 3.83 wt% single‐atom Ru incorporation in the obtained Ni5P4‐Ru. The Ni5P4‐Ru as an alkaline hydrogen evolution reaction catalyst achieves low onset potential of 17 mV and an overpotential of 54 mV at a current density of 10 mA cm‐2 together with a small Tafel slope of 52.0 mV decade‐1 and long‐term stability. Further spectroscopy analyses combined with density functional theory calculations reveal that the doped Ru sites can cause localized structure polarization, which brings the low energy barrier for water dissociation on Ru site and the optimized hydrogen adsorption free energy on the interstitial site, well rationalizing the experimental reactivity.

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“…Moreover, the resultant morphology evolution endows these atomic‐scale layers larger exposed surface to bulk ratios, which favors heterogeneous catalysis with enlarged contact interface [7] . Nevertheless, the anisotropy of van der Waals solids usually leads to inert basal planes, in which the atoms are bonded firmly in a saturated coordination environment without obvious catalytic activity, only a few unsaturated edge atoms under different chemical environments could serve as active centers for electrocatalytic HER [6a,8] . In addition, the anisotropy also contributes to the different electron transfer rates on the edge and basal planes.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineering of van der Waals Solids for Electrocatalytic Hydrogen Evolution

Liu

Yang

et al. 2020

Chemistry An Asian Journal

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Van der Waals solids with tunable band gaps and interfacial properties have been regarded as a class of promising active materials for electrocatalytic hydrogen evolution reaction (HER). However, due to the anisotropic features, their basal planes are usually electrochemically inert, only a few unsaturated edge atoms could serve as active centers to actuate H 2 generation. Hence, material utilization and productivity efficiency are insufficient for practical applications. Recently, diverse defects have been confirmed to enable tailoring atomic configurations and electronic properties of van der Waals solids, thus triggering their superior catalytic activity of in-plane atoms while introducing high amount of new active sites. In this minireview, we summarize the state-of-the-art progress of defect engineering in van der Waals solids for HER, focusing in particular on their advantages in material modification and corresponding catalytic mechanisms. We also propose the challenges and perspectives of these catalytic materials in terms of both experimental synthesis and fundamental understanding of the defect structures.

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Discovering superior basal plane active two-dimensional catalysts for hydrogen evolution

Cited by 65 publications

References 29 publications

Extending the Colloidal Transition Metal Dichalcogenide Library to ReS₂ Nanosheets for Application in Gas Sensing and Electrocatalysis

Extending the Colloidal Transition Metal Dichalcogenide Library to ReS₂ Nanosheets for Application in Gas Sensing and Electrocatalysis

Achieving Efficient Alkaline Hydrogen Evolution Reaction over a Ni₅P₄ Catalyst Incorporating Single‐Atomic Ru Sites

Defect Engineering of van der Waals Solids for Electrocatalytic Hydrogen Evolution

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Discovering superior basal plane active two-dimensional catalysts for hydrogen evolution

Cited by 65 publications

References 29 publications

Extending the Colloidal Transition Metal Dichalcogenide Library to ReS2 Nanosheets for Application in Gas Sensing and Electrocatalysis

Extending the Colloidal Transition Metal Dichalcogenide Library to ReS2 Nanosheets for Application in Gas Sensing and Electrocatalysis

Achieving Efficient Alkaline Hydrogen Evolution Reaction over a Ni5P4 Catalyst Incorporating Single‐Atomic Ru Sites

Defect Engineering of van der Waals Solids for Electrocatalytic Hydrogen Evolution

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Extending the Colloidal Transition Metal Dichalcogenide Library to ReS₂ Nanosheets for Application in Gas Sensing and Electrocatalysis

Extending the Colloidal Transition Metal Dichalcogenide Library to ReS₂ Nanosheets for Application in Gas Sensing and Electrocatalysis

Achieving Efficient Alkaline Hydrogen Evolution Reaction over a Ni₅P₄ Catalyst Incorporating Single‐Atomic Ru Sites