Modulating the electronic structure of Mo2C/MoP heterostructure to boost hydrogen evolution reaction in a wide pH range

Ma, Jingwen; Zhang, Tianai; Yin, Fusheng; Wang, Jun; Zhang, Zhijun; Sun, Chunwen

doi:10.1016/j.jcis.2023.07.012

Cited by 19 publications

(10 citation statements)

References 28 publications

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“…Although a disparity remains in comparison to noble metal catalysts (e.g., the overpotential at 10 mA cm –2 for 20 wt % Pt/C is 21 mV), the A-Co 60 Fe 1.1 V still holds certain advantages when compared with similar non-noble metal catalysts (Figure S9). − In contrast, A-Co 60 Fe 1.1 , A-Co 60 V, A-Co, Co 3 O 4 , and Co(OH) 2 require significantly higher overpotentials of 150, 70, 224, 217, and 210 mV, respectively, to achieve the same current density. To investigate the reaction kinetics, the corresponding Tafel slopes are derived from the respective linear sweep voltammetry (LSV) curve of the catalysts.…”

Section: Resultsmentioning

confidence: 99%

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

Ge,

Yang,

Guan

et al. 2023

Inorg. Chem.

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The development of efficient and stable bifunctional electrocatalysts based on non-noble metals for water electrolysis is both urgent and challenging. However, unresolved issues remain regarding the challenge of identifying the active phase and gaining a comprehensive understanding of its surface reconstruction and functionality throughout the reaction process. In this study, we have combined doping and heterostructure construction by a one-step electrodeposition and a subsequent activation treatment to synthesize Fe, V co-doped Co3O4/Co(OH)2 and Co/Co(OH)2 heterointerfaces (referred to as A-Co60Fe1.1V). These heterointerfaces, composed of Co/Co(OH)2 and Co3O4/Co(OH)2, are proposed to facilitate charge transfer process during catalysis. X-ray photoelectron spectroscopy (XPS) analysis demonstrates that the introduction of V and Fe dopants increases the valence state of Co centers in Co3O4 and Co(OH)2. Further operando Raman spectroscopy reveals that Co(OH)2 and Co3O4 with the high-valence Co centers remain stable during the hydrogen evolution reaction (HER) process. These high-valence Co centers are believed to promote the crucial water dissociation step and therefore enhance the overall HER catalysis. On the other hand, during the oxygen evolution reaction (OER), Fe, V co-doping leads to an earlier formation of the active CoOOH species, while Fe doping can further help stabilize the more reactive β-CoOOH species instead of the less reactive γ-CoOOH. As a result, the A-Co60Fe1.1V catalyst exhibits significantly improved catalytic activity for both HER and OER that it requires low overpotentials of 51 and 250 mV, respectively, to attain a current density of 10 mA cm–2. Moreover, when utilized as both the cathode and anode in alkaline water electrolysis, the A-Co60Fe1.1V catalyst can operate at a mere 1.54 V voltage while maintaining 10 mA cm–2, surpassing the majority of non-noble metal catalysts. Remarkably, it also exhibits stability for at least 40 h at ∼100 mA cm–2.

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Section: Resultsmentioning

confidence: 99%

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

Ge,

Yang,

Guan

et al. 2023

Inorg. Chem.

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“…The intrinsic activity of each site would not be enhanced simply by an increased specific surface area. The electrical structures within the components on both sides of the heterogeneous interface are optimized through the generation of heterogeneous structures, which is an effective way of advancing the intrinsic activity of HER catalysts. , Specific nanostructures and intrinsically exposed edges of heterostructured HER catalysts provide enough sites for the adsorption of HER intermediates, which in turn expose a significant number of active sites. To increase the mass of the active sites even further, heterogeneous structures can be built on the conductive substrate.…”

Section: Introductionmentioning

confidence: 99%

Interface Engineering with the Coupling of a 3D Porous Structure Enables MoP₂–NiCoP Heterostructure Nanosheets for Enhanced Alkaline Hydrogen Evolution Reaction

Qian,

Hu,

Zheng

et al. 2024

Inorg. Chem.

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One of the crucial parts of the electrochemically focused energy conversion and storage system is the hydrogen evolution reaction. The further exploration of electrocatalysts made of nonprecious metals could help to bring the technology closer to industrialization. Here, we present an effective hydrogen evolution reaction (HER) electrocatalyst that employs hydrothermal and phosphorization steps to create three-dimensional (3D) porous MoP 2 −NiCoP heterostructure nanosheets on nickel foam (MoP 2 − NiCoP/NF). H 2 O-dissociation and H-adsorption were effectively achieved due to the distinctive interface engineering between NiCoP and MoP 2 , which functions as a channel for immediate electron transfer. Compared to the single-component MoP 2 and NiCoP, the synergistic interaction between the heterogeneous components coupling and the 3D porous structure enables MoP 2 −NiCoP/NF to exhibit satisfactory catalytic activity with an ultralow overpotential of 50 mV at 10 mA cm −2 , which is close to the commercial Pt/C catalyst in alkaline media. More importantly, it exhibits good stability, with the ability to be electrolyzed in 1.0 M KOH electrolyte for 24 h without a significant change in overpotential. This study offers directions for the design of low-cost, high-activity, transition metal phosphides (TMPs)-based HER catalyst alternatives for future practical applications.

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“…[4,5] Generally, it is more difficult for most of the electrocatalysts to produce hydrogen or oxygen, even oxidize alcohol in neutral or alkaline conditions, mainly because of the sluggish decomposition kinetics. [6][7][8] The scientists found that under alkaline conditions, even the most active Pt-based catalyst, HER/OER/ AOR kinetics is 2 to 3 orders of magnitude slower than that under acidic condition. [9][10][11] Great efforts have been made to develop highly active and stable electrocatalysts in neutral or alkaline conditions, for its importance in large-scale water hydrogen production or alkaline membrane fuel cell industry.…”

Section: Introductionmentioning

confidence: 99%

Biomass Carbon Anchored Co‐N₄ Single‐Atom Catalyst for Efficient Hydrogen Evolution, Oxygen Evolution and Alcohol Oxidation Reaction

Wang,

Chen,

Wang

et al. 2024

ChemistrySelect

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Great efforts have been made to boost the performance of electrochemical catalysts by regulating the electronic and geometric structures. However, the electrochemical catalytic properties have entered the bottleneck stage only depend on these methods, especially in alkaline or neutral conditions. It is highly desired to develop new strategy to make robust electrocatalysts. In this study, an atomic Co‐N4 catalyst embedded on nitrogen‐doped 3D hierarchically porous carbon has been prepared via a facile method of calcining the coordination compound. Benefiting from the unique properties of Co single‐atoms, they are coordinated with the heteroatom nitrogen of o‐phenylenediamine and melamine and anchored on the nitrogen‐doped porous carbon carriers. The as‐synthesized Co‐N‐LPC with a maximum Co single‐atom loading of 3.82 wt % features a high specific surface area of 196.6 m2 g−1 and exhibits decently high hydrogen evolution, oxygen evolution and alcohol oxidation catalytic activities in 1.0 mol L−1 KOH electrolyte with competitive overpotentials of 131, 318 and 124 mV at 10 mA cm−2 current density respectively. This study offers a cost‐effective electrocatalyst for water splitting or alcohol oxidation that can be used instead of noble metals in various renewable energy storage and conversion applications.

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Modulating the electronic structure of Mo2C/MoP heterostructure to boost hydrogen evolution reaction in a wide pH range

Cited by 19 publications

References 28 publications

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

Interface Engineering with the Coupling of a 3D Porous Structure Enables MoP₂–NiCoP Heterostructure Nanosheets for Enhanced Alkaline Hydrogen Evolution Reaction

Biomass Carbon Anchored Co‐N₄ Single‐Atom Catalyst for Efficient Hydrogen Evolution, Oxygen Evolution and Alcohol Oxidation Reaction

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Modulating the electronic structure of Mo2C/MoP heterostructure to boost hydrogen evolution reaction in a wide pH range

Cited by 19 publications

References 28 publications

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

Interface Engineering with the Coupling of a 3D Porous Structure Enables MoP2–NiCoP Heterostructure Nanosheets for Enhanced Alkaline Hydrogen Evolution Reaction

Biomass Carbon Anchored Co‐N4 Single‐Atom Catalyst for Efficient Hydrogen Evolution, Oxygen Evolution and Alcohol Oxidation Reaction

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Product

Resources

About

Interface Engineering with the Coupling of a 3D Porous Structure Enables MoP₂–NiCoP Heterostructure Nanosheets for Enhanced Alkaline Hydrogen Evolution Reaction

Biomass Carbon Anchored Co‐N₄ Single‐Atom Catalyst for Efficient Hydrogen Evolution, Oxygen Evolution and Alcohol Oxidation Reaction