Co3[Fe(CN)6]2 nanocube derived architecture of Co,Fe co-doped MoS2 nanosheets for efficient water electrolysis

Chen, Si; Wu, Yanhua; Sun, Yanfang; Liu, Qingyun; Tang, Lin; Zhang, Xiao; Guo, Jinxue

doi:10.1016/j.electacta.2019.04.078

Cited by 30 publications

(7 citation statements)

References 40 publications

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“…It is worth pointing out that the performance of NiCoP–MoS 2 –V Mo has exceeded that of most of the reported Mo-based HER catalysts (Figure c and Table S7). − The current density remains unchanged over 20 h of testing, which also proves the excellent stability of the composite. Furthermore, Raman, XRD, SEM, HRTEM, mapping, XANES, and XPS tests indicate that the morphology and structure of NiCoP–MoS 2 –V Mo after the HER tests have no noticeable change (Figures S8-S11), also proving the excellent stability during the HER process.…”

Section: Resultsmentioning

confidence: 61%

Activated MoS₂ by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

Chen

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

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Regulating the electronic structure of MoS2 by constructing cationic vacancies is an effective method to activate and improve its intrinsic properties. Herein, we synthesize the MoS2-based composite with abundant single atomic Mo cation vacancies through uniformly loading nickel–cobalt–Prussian blue analogues (NiCoPBA) (NiCoPBA–MoS2–VMo) by immersing a single Ni atom-decorated MoS2 (Ni–MoS2) into K3[Co(CN)6] solution. Subsequently, NiCoP–MoS2–VMo with improved conductivity is obtained by phosphating the composite as a high-efficiency hydrogen evolution reaction (HER) catalyst. Experiments and theoretical calculations indicate that the electrons of NiCoP are spontaneously transferred to the substrate MoS2–VMo nanosheets in NiCoP–MoS2–VMo, and the moderately oxidized NiCoP is beneficial to the adsorption of OH*. Meanwhile, the mono-atomic Mo cation vacancies of the catalyst modulate the electronic structure of S, optimizing the adsorption of hydrogen in the reaction process. Therefore, NiCoP–MoS2–VMo has enhanced chemical adsorption for H* (on MoS2–VMo) and OH*(on NiCoP), expediting the water-splitting step and HER catalysis, and benefiting from the regulation of the electronic structure induced by the construction of metallic Mo vacancies in MoS2, the as-prepared catalyst displays an overpotential of only 67 mV at 10 mA cm–2 with long-term stability (no current decay over 20 h). This work affords not only a kind of efficient HER catalysts but also a new valuable route for developing inexpensive and high-performance catalysts with single atomic cation vacancies.

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Section: Resultsmentioning

confidence: 61%

Activated MoS₂ by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

Chen

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

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“…Figure e summarizes the catalytic performance parameters among the reported molybdenum sulfide based electrocatalysts. The FeMoSN@NC prepared in this work possessed the outstanding HER activity with a Tafel slope of 67 mV dec –1 and an overpotential of 150 mV at the current density of −100 mA mg –1 . ,− …”

Section: Resultsmentioning

confidence: 90%

High-Density Defects Activating Fe-Doped Molybdenum Sulfide@N-Doped Carbon Heterostructures for Efficient Electrochemical Hydrogen Evolution

Xia

Zhao

et al. 2021

ACS Sustainable Chem. Eng.

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Vacancy defects caused by doping are beneficial to optimizing the regional electronic structure and increasing exposed active sites, and it is vital to improve the efficiency of hydrogen evolution reaction (HER). Herein, we constructed the Fe-doped molybdenum sulfide encapsulated with N-doped carbon (FeMoSN@ NC), which with ultrathin edge-curled layer structure. Fe-doping realized with Prussian blue nanocages as the precursors, which plays a crucial role in the formation of ultrathin layer assembled microspheres. Experimental tests and theoretical calculations show that the Fe-doping can not only expand the interlayer of MoS 2 (∼11 Å) to obtain ultrathin layers but also embed into the in-plane location of MoS 2 to form high-density doping and vacancy defects. The regulation of regional active sites caused by Fe-doping can enhance the intrinsic catalytic activity of catalyst, including more active sites for HER, appropriate Gibbs free energy of hydrogen adsorption (−0.11 eV of Fe1 Mo -V Mo,S ), and low resistance for carrier transfer (9 Ω). FeMoSN@NC as the HER electrocatalyst exhibits efficient activity with a Tafel slope of 67 mV dec −1 and an overpotential of 150 mV at the current density of −100 mA mg −1 . The above insights provide new transition metal doping strategy for efficient molybdenum sulfide electrocatalysts with optimized active sites and increased electrochemical active area.

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“…47 At the same time, bimetallic cation co-doped electrocatalysts have been widely studied. [48][49][50] Compared with single doping, codoping can further adjust the electronic structure of the catalyst through a synergistic effect between metals and can greatly increase the active center. 51 Our group 26 greatly improved the water oxidation activity and urea oxidation activity of the Ni 3 S 2 @NiP 2 material through an anion and cation co-doping strategy.…”

Section: Introductionmentioning

confidence: 99%

Co, Mn co-doped Fe₉S₁₁@Ni₉S₈ supported on nickel foam as a high efficiency electrocatalyst for the oxygen evolution reaction and urea oxidation reaction

Zhang

et al. 2022

Dalton Trans.

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Co3[Fe(CN)6]2 nanocube derived architecture of Co,Fe co-doped MoS2 nanosheets for efficient water electrolysis

Cited by 30 publications

References 40 publications

Activated MoS₂ by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

Activated MoS₂ by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

High-Density Defects Activating Fe-Doped Molybdenum Sulfide@N-Doped Carbon Heterostructures for Efficient Electrochemical Hydrogen Evolution

Co, Mn co-doped Fe₉S₁₁@Ni₉S₈ supported on nickel foam as a high efficiency electrocatalyst for the oxygen evolution reaction and urea oxidation reaction

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Co3[Fe(CN)6]2 nanocube derived architecture of Co,Fe co-doped MoS2 nanosheets for efficient water electrolysis

Cited by 30 publications

References 40 publications

Activated MoS2 by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

Activated MoS2 by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

High-Density Defects Activating Fe-Doped Molybdenum Sulfide@N-Doped Carbon Heterostructures for Efficient Electrochemical Hydrogen Evolution

Co, Mn co-doped Fe9S11@Ni9S8 supported on nickel foam as a high efficiency electrocatalyst for the oxygen evolution reaction and urea oxidation reaction

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Activated MoS₂ by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

Activated MoS₂ by Constructing Single Atomic Cation Vacancies for Accelerated Hydrogen Evolution Reaction

Co, Mn co-doped Fe₉S₁₁@Ni₉S₈ supported on nickel foam as a high efficiency electrocatalyst for the oxygen evolution reaction and urea oxidation reaction