Rate Of Charge Transport Research Articles

Fe2NiSe4 Nanowires Array for Highly Efficient Electrochemical H2S Splitting and Simultaneous Energy-Saving H2 Production

The electrochemical removal of abundant and toxic H2S from highly sour reservoirs has emerged as a promising method for hydrogen production and desulfurization. Nevertheless, the ineffectiveness and instability of current electrocatalysts have impeded further utilization of H2S. In this communication, we introduce a robust array of Fe2NiSe4 nanowires synthesized in situ on a FeNi3 foam (Fe2NiSe4/FeNi3) via hydrothermal treatment. This array acts as an active electrocatalyst for ambient H2S splitting. It offers numerous exposed active sites and a rapid electron transport channel, significantly enhancing charge transport rates. As an electrode material, Fe2NiSe4/FeNi3 displays remarkable electrocatalytic efficiency for both sulfide oxidation and hydrogen evolution reactions. This bifunctional electrode achieves efficient electrochemical H2S splitting at a low potential of 440 mV to reach a current density of 100 mA∙cm−2, with a faradaic efficiency for hydrogen production of approximately 98%. These findings highlight its significant potential for desulfurization and energy-efficient hydrogen generation.

(Invited) Computational Design and Analysis of Novel Battery Electrolytes Driven by the Grotthuss Mechanism

Candidate systems for next-generation electrolyte materials, such as deep eutectic solvents and ionic liquids, often suffer from high viscosities, which suppresses rates of charge transport and limits their performance characteristics. A strategy for circumventing this problem is to leverage the structural or Grotthuss mechanism of proton transport through hydrogen-bond networks, which can exhibit high proton diffusion rates even when rates of vehicular charge transport are poor. In this talk, I will describe a project aimed at leveraging computational design and simulation approaches, in combination with experimental synthesis and characterization, to develop a novel class of battery electrolytes based on the structural/Grotthuss diffusion mechanism. The workflow involves identification of a suitable proton-carrier liquid, a proton source, and a redox-active species capable of undergoing proton-coupled electron transfer (PCET) reactions. I will discuss the computational methods, which involve a combination of machine learning and first-principles simulation techniques, candidate chemical species for each of the components, first simulation and experimental protocols for combining these components into a high-performance electrolyte, preliminary results, and next steps in the evolution of the project. This work will serve to illustrate both the power of modern computational approaches in the design of electrochemical systems but also to broaden the perspective on what constitutes a “breakthrough” electrolyte. Figure 1

Synergistic effect of Li, La co-doping on photocatalytic activity of BaTiO3 ferroelectric material for effective degradation of toxic NOx for environmental remediation

We investigated the synergistic effects of Li, La-doping and co-doping on the A-site of perovskite BaTiO3 microstructure as a catalyst for the removal of toxic NOx for environmental remediation. The Rietveld refinement of XRD and Raman analysis confirmed that at room temperature, the ceramic samples possessed a pure-tetragonal perovskite structure, with P4mm space group. SEM images revealed a denser microstructure with reduced grain size on Li, La doping in BaTiO3. XPS results confirmed the coexistence of Li and La as doping elements into BaTiO3 lattice. EPR and PL spectra demonstrate the presence of Ti and Ba vacancies as well as defects. According to the DRS results, the absorption edge of the co-doped sample was blue-shifted. In frequency-dependent dielectrics, the co-doped sample exhibits the greatest rise in dielectric permittivity. Impedance measurement demonstrates the fastest rate of charge transport in Ba0.98Li0.01La0.01TiO3. Similarly, Li and La incorporation into BaTiO3 significantly reduced the recombination extent of charge carriers as evidenced by the PL. Under UV light, the photocatalytic NOx degradation with Ba0.98Li0.01La0.01TiO3 achieved a remarkable 44 % efficiency during 60 min. This enhancement is associated with improved charge carrier separation at the interface between the ferroelectric surfaces. Only a marginal decrease in photocatalytic activity occurred after four consecutive runs. A reasonable photocatalytic mechanism for the degradation of NOx over Ba0.98Li0.01La0.01TiO3 is proposed. This study's findings can inspire the design and synthesis of rare earth and alkali metal ion co-doped photocatalysts with built-in electric fields of a ferroelectric material for efficient NOx removal from the environment.

DBS−-doped polypyrrole/CNTs with 3D conductive architecture connected with MoS2 as symmetrical electrodes for boosted CDI capability

Molybdenum disulfide (MoS2), as an appealing Faradaic material for efficient capacitive deionization (CDI), is limited by unsatisfactory electrical conductivity, inferior removal rate, and restacking. Herein, we develop a CNT/PPy/MoS2 ternary composite using a robust 3D conductive interconnected structure CNT/PPy, constructed from multi-walled carbon nanotubes (MWCNTs) and polypyrrole (PPy) doped with dodecyl benzene sulfonate (DBS-), as the growing substrate to mitigate the aggregation of MoS2 nanoflakes. In this design, CNT/PPy ameliorates the wettability of the composite, provides convenient movement pathways, a fast charge transport rate, and facilitates ions diffusion process. Moreover, reinforced dispersibility and enlarged interlayer spacing of MoS2 nanoflakes supply sufficient embedded sites for ion uptake and rapid transfer. Meanwhile, tight chemical coupling of Mo-N-C bonds can maintain the structural integrity of the composite electrode. Particularly, the symmetrical electrode configuration was established to address the kinetical unbalance of HCDI system. Consequently, the CNT/PPy/MoS2 displays a large specific capacitance of 160.83 F g−1 at 5 mV s−1, which is nearly 4.33 times that of MoS2 (37.17 F g−1). The optimized CNT/PPy/MoS2 cell achieves a maximum desalination capacity of 24.8 mg g−1, ultra-high deionization rate of 5.24 mg g−1 min−1, and superior capacity retention rate of 92.7% over 25 cycles. In addition, Na+ ions were captured by the joint action of cation-exchange of DBS--doped PPy, electrostatic adsorption of CNTs, and intercalation reaction of MoS2. The proposed composite structural design and electrode configuration should be a potential avenue to realize highly efficient deionization.

Preparation of Sea Urchin‐Like Co/Ni Alloy Compounds for Pseudocapacitive Supercapacitor

Energy density and power density are the two most crucial metrics in advanced electrochemical energy storage (EES) devices. The design of pseudocapacitor materials with good structure and reasonable composition can ensure that the power density can be greatly increased under the condition of little or no reduction in energy density. However, how to reasonably design excellent pseudocapacitor materials is still a huge challenge. Herein, layered double hydroxides containing Ni and Co elements on carbon materials derived from distillers’ grains by hydrothermal synthesis (NiCo‐LDH/JKPC‐2) are grown. The fabricated NiCo‐LDH/JKPC‐2 has exhibited a sea urchin‐like nanostructure that primarily consists of mesoporous and possesses a high specific surface area (303 m2 g−1), which facilitates the formation of larger active sites, thereby increasing the rate of charge transport. The specific capacitance of the NiCo‐LDH/JKPC‐2 reaches a maximum value of 1454 F g−1 at 1 A g−1. When it combines with carbon materials originating from distillers’ grains, the assembled asymmetric supercapacitor electrode exhibits a remarkable energy density (40.86 Wh kg−1 at 775 W kg−1) and superior power density (7750.8 W kg−1 at 21.53 Wh kg−1). Thus, the NiCo‐LDH/JKPC‐2 asymmetric supercapacitor electrode can be considered as a potential candidate in advanced energy storage device systems.

The effect of interface heterogeneity on zinc metal anode cyclability.

Zinc metal batteries (ZMBs) are promising candidates for low-cost, intrinsically safe, and environmentally friendly energy storage systems. However, the anode is plagued with problems such as the parasitic hydrogen evolution reaction, surface passivation, corrosion, and a rough metal electrode morphology that is prone to short circuits. One strategy to overcome these issues is understanding surface processes to facilitate more homogeneous electrodeposition of zinc by guiding the alignment of electrodeposited zinc. Using Scanning Electrochemical Microscopy (SECM), the charge transport rate on zinc metal anodes was mapped, demonstrating that manipulating electrolyte concentration can influence zinc electrodeposition and solid electrolyte interphase (SEI) formation in ZMBs. Using XPS and Raman spectroscopy, it is demonstrated that an SEI is formed on zinc electrodes at neutral pH, composed primarily of a Zn4(OH)6SO4·xH2O species, its formation being attributed to local pH increases at the interface. This work shows that more extended high-rate cycling can be achieved using a 1 M ZnSO4 electrolyte and that these systems have a reduced tendency for soft shorts. The improved cyclability in 1 M ZnSO4 was attributed to a more homogeneous and conductive interface formed, rather than the bulk electrolyte properties. This experimental methodology for studying metal battery electrodes is transferable to lithium metal and anode-free batteries, and other sustainable battery chemistries such as sodium, magnesium, and calcium.

Manipulating Sulfur Conversion Kinetics through Interfacial Built-In Electric Field Enhanced Bidirectional Mott-Schottky Electrocatalysts in Lithium-Sulfur Batteries.

Efficient electrocatalysts and catalytic mechanisms remain a pressing need in Li-S electrochemistry to address lithium polysulfide (LiPS) shuttling and enhance conversion kinetics. This study presents the development of multifunctional VO2@rGO heterostructures, incorporating interfacial built-in electric field (BIEF) enhancement, as a Mott-Schottky electrocatalyst for Li-S batteries. Electrochemical experiments and theoretical analysis demonstrate that the interfacial BIEF between VO2 and rGO induces self-driven charge redistribution, resulting in accelerated charge transport rates, enhanced LiPS chemisorption, reduced energy barriers for Li2S nucleation/decomposition, and improved Li-ion diffusion behavior. The Mott-Schottky electrocatalyst, combining the strengths of VO2's anchoring ability, rGO's metallic conductivity, and BIEF's optimized charge transport, exhibits an outstanding "trapping-conversion" effect. The modified Li-S battery with a VO2@rGO-modified separator achieves a highly reversible capacity of 558.0 mAh g-1 at 2 C over 600 cycles, with an average decay rate of 0.048% per cycle. This research offers valuable insights into the design of Mott-Schottky electrocatalysts and their catalytic mechanisms, advancing high-efficiency Li-S batteries and other multielectron energy storage and conversion devices.

Realization of High-Efficiency Inverted Planar Perovskite Solar Cells Based on PEDOT: PSS Doped with Lithium Fluoride

The photovoltaic performance of perovskite solar cells with inverted structure depends on the conductivity of the hole transport layer and the charge transport rate to some extent. To further enhance the effect of the hole transport layer, lithium fluoride (LiF) was doped into poly (3,4-ethylene dioxythiophene)-polystyrene sulfonic acid (PEDOT: PSS) to improve its rate of conductivity and interfacial charge transport. The optimal photoelectric conversion efficiency of LiF-based perovskite solar cells that dope hole transport layer is 20.32% with negligible hysteresis, which is much higher than that of the control group (16.70%). Among all photovoltaic parameters, the improvement of open circuit voltage and fill factor is significant. LiF can not only promote the electrical characteristics of PEDOT: PSS and its hole mobility, but also optimize the quality of the upper perovskite film. Perovskite film shows a crystal orientation more conducive to hole transport on the modified hole transport layer, which obtains a dense and smooth absorption layer film. In this study, PEDOT: PSS-based perovskite solar cells with inverted structure doped with LiF are prepared, which provides a simple and effective method to commercialize perovskite solar cells.

Synthesis of binary metal doped CeO2 via the subcritical hydrothermal method for photo-mineralizing methyl orange dye

Herein, we adopted subcritical hydrothermal method to synthesize the copper and bismuth co-doped CeO2 (Ce0.92Cu0.04Bi0.04O2) nanostructure for water remediation application. Copper and Bismuth co-doping synergistically improved the current conductivity and light-harvesting capabilities of the co-doped CeO2 that is respectively confirmed through current-voltage and optical studies. The microstructural, compositional and morphological information of the as-synthesized photocatalyst were accessed through powder XRD, and electronics spectroscopic techniques. In terms of practical application, the as-prepared co-doped CeO2-based photocatalyst mineralized the anionic dye (methyl orange, MO) up to 95.79%, at the rate of 0.0314 min−1, in just 50 min of solar irradiation. Statistics show that our Ce0.92Cu0.04Bi0.04O2 photocatalyst is 2.32 times more effective at mineralizing MO dye, and its rate of dye mineralization is 5.5 times faster than a CeO2 photocatalyst. In addition, the Ce0.92Cu0.04Bi0.04O2 photocatalyst possesses exceptional robustness as it fully retains its photocatalytic activity after three consecutive reusability tests. Our doped photocatalyst's excellent dye mineralizing activities come from the way its hybrid nanostructure morphology, good current conductivity, visible-light-supported bandgap, and induced structural defects work together. This gives it a larger surface area, a faster charge transport rate, better light harvesting ability, and lower charge recombination efficiencies. The copper and bismuth co-doping in the CeO2 lattice have a positive effect on its photocatalytic properties, suggesting that it has the potential to be a light-driven catalyst for azo dyes degradation.

Revisiting the Mechanisms of Charge Transport in Solutions of Redox-Active Molecules Using Computer Simulations: When and Why Do Analytical Theories Fail?

Understanding charge transport is essential for the development of energy-storage applications. This work introduces a new theoretical methodology to model diffusive charge transport in solutions of redox-active molecules by combining Langevin dynamics for the spatial degrees of freedom and a master-equation formalism to describe the electron-hopping events between redox molecules. The model is used to analyze the effects of the concentration of the redox molecules and the strength of the intermolecular interactions on the charge-transport mechanism. In the past, the rate of charge transport has been modeled with the analytical Dahms-Ruff equation; however, this is a mean-field equation, whose range of validity has not been tested with less approximate theories. We show that the Dahms-Ruff equation fails to quantitatively predict the diffusion coefficient for charge transport for large concentrations of the redox species and high bimolecular electron-transfer rates, i.e., the most relevant conditions for energy-storage applications. Under these conditions, the diffusion coefficient for charge transport obtained from simulations is larger than that predicted from the Dahm-Ruff equation because of the formation of transient clusters of redox molecules. Also, intermolecular interactions, which are not taken into account by the Dahms-Ruff equation, play a central role in the charge transport of redox species. We show that the apparent diffusion coefficient experiences a maximum with respect to the strength of the intermolecular attractions. This maximum is traced back to the formation of clusters and their two opposite effects on the diffusion coefficient: electron hopping is fast within a cluster but inefficient between neighboring clusters.

Exploring the Role of Short Chain Acids as Surface Ligands in Photoinduced Charge Transfer Dynamics from CsPbBr3 Perovskite Nanocrystals

The most commonly used surface capping ligands, like oleic acid and oleylamine, passivate the surface of perovskite nanocrystals (PNCs) to enhance their stability and optical properties. However, due to their inherent insulating nature, charge transport across the surface of the PNCs is hindered, limiting their application in devices. In this study, we have post-treatment CsPbBr3 PNCs with short chain ligands benzoic acid (BA) and ascorbic acid (AA) and observed that both acid-treated PNCs show enhanced stability and optical properties. Still, BA-treated PNCs show the highest charge transport rate due to their conjugating nature. The photoelectrochemical measurements also show the most efficient electron flow across the surface of the PNC with BA-treated PNCs. A longer carrier lifetime and fast charge transfer make BA-treated PNCs ideal candidates for application in real-life devices.

Engineering promising A-π-D type molecules for efficient organic-based material solar cells

ABSTRACT Within this work, to promote the efficiency of organic-based solar cells, a series of novel A-π-D type small molecules were scrutinised. The acceptors which we designed had a moiety of N, N-dimethylaniline as the donor and catechol moiety as the acceptor linked through various conjugated π-linkers. We performed DFT (B3LYP) as well as TD-DFT (CAM-B3LYP) computations using 6-31G (d,p) for scrutinising the impact of various π-linkers upon optoelectronic characteristics, stability, and rate of charge transport. In comparison with the reference molecule, various π-linkers led to a smaller HOMO–LUMO energy gap. Compared to the reference molecule, there was a considerable red shift in the molecules under study (A1–A4). Therefore, based on the analysis of energy level, A4 and A3 were shown to be promising non-fullerene acceptors with the designed donors for applications in solar cells. It is hoped that the current study would provide theoretical insights into the design and amplification of optoelectronic characteristics of suggested frameworks on a grand scale in comparison with the reference molecules.

In Situ Growth of Fe2O3 Nanorod Arrays on Carbon Cloth with Rapid Charge Transfer for Efficient Nitrate Electroreduction to Ammonia.

Electrochemical reduction of nitrate to ammonia (NH3), a green NH3 production route upon combining with renewable energy sources, is an appealing and alternative method to the Haber-Bosch process. However, this process not only involves the complicated eight-electron reduction to transform nitrate into various nitrogen products but simultaneously suffers from the competitive hydrogen evolution reaction, challenged by a lack of efficient catalysts. Herein, the in situ growth of Fe2O3 nanorod arrays on carbon cloth (Fe2O3 NRs/CC) is reported to exhibit a high NH3 yield rate of 328.17 μmol h-1 cm-2 at -0.9 V versus RHE, outperforming most of the reported Fe catalysts. An in situ growth strategy provides massive exposed active sites and a fast electron-transport channel between the carbon cloth and Fe2O3, which accelerates the charge-transport rate and facilitates the conversion of nitrate to NH3. In situ Raman spectroscopy in conjunction with attenuated total reflection Fourier transform infrared spectroscopy reveals the catalytic mechanism of nitrate to NH3. Our study provides not only an efficient catalyst for NH3 production but also useful guidelines for the pathways and mechanism of nitrate electroreduction to NH3.

Interplay between Interfacial Energy, Contact Mechanics, and Capillary Forces in EGaIn Droplets.

Eutectic gallium–indium (EGaIn) is increasingly employed as an interfacial conductor material in molecular electronics and wearable healthcare devices owing to its ability to be shaped at room temperature, conductivity, and mechanical stability. Despite this emerging usage, the mechanical and physical mechanisms governing EGaIn interactions with surrounding objects—mainly regulated by surface tension and interfacial adhesion—remain poorly understood. Here, using depth-sensing nanoindentation (DSN) on pristine EGaIn/GaOx surfaces, we uncover how changes in EGaIn/substrate interfacial energies regulate the adhesive and contact mechanic behaviors, notably the evolution of EGaIn capillary bridges with distinct capillary geometries and pressures. Varying the interfacial energy by subjecting EGaIn to different chemical environments and by functionalizing the tip with chemically distinct self-assembled monolayers (SAMs), we show that the adhesion forces between EGaIn and the solid substrate can be increased by up to 2 orders of magnitude, resulting in about a 60-fold increase in the elongation of capillary bridges. Our data reveal that by deploying molecular junctions with SAMs of different terminal groups, the trends of charge transport rates, the resistance of monolayers, and the contact interactions between EGaIn and monolayers from electrical characterizations are governed by the interfacial energies as well. This study provides a key understanding into the role of interfacial energy on geometrical characteristics of EGaIn capillary bridges, offering insights toward the fabrication of EGaIn junctions in a controlled fashion.

Design organic material with acceptor-π-donor configuration for high performance solar cells

In order to develop efficient organic solar cells, we investigated 4 small non-fullerene novel acceptor-π-donor type molecules in this research. Prepared acceptors include a 2-cyanoacrylic acid part as the acceptor unit and a 9-Phenylcarbazole part as the donor unit (central core) which are linked through various conjugated π-linkers. DFT as well as time-dependent DFT computations was executed with the 6-311G (d,p) for scrutinizing the impact that various π-linkers have upon stability, charge transport (CT) rate as well as optoelectronic attributes. In comparison to the R molecule, various π-linkers lead to smaller LUMO-HOMO energy gaps. A1-A4 molecules have shown a significant bathochromic shift compared to the R molecule. Hence, energy level analysis reveals that A4 and A3 could perform as appropriate non-fullerene acceptors with designed donors for functional solar cell applications. We expect the whole work to provide useful theoretical guidance to help design and reinforce optoelectronic attributes of the offered frameworks on a larger scale.

Oxidative dehydrogenation of ethane and subsequent CO2 activation on Ce-incorporated FeTiOx metal oxides

• Oxidative dehydrogenation (ODH) with successive CO 2 activation was studied. • Number of lattice oxygen mobility was related with chemical looping (CL)-ODH activity. • Facile redox property of CeFeTiO x was enhanced with new FeTiO 3 phases formation. The Ce-incorporated FeTiO x catalysts were investigated for an oxidative dehydrogenation (ODH) of C 2 H 6 (reduction step) and successive CO 2 activation to CO (oxidation step) through redox chemical looping (CL-ODH) cycles of those partially reducible metal oxides via mutual phase changes between Fe 2+ /Fe 3+ and Ti 3+ /Ti 4+ species. A higher lattice oxygen mobility with less surface electrophilic oxygen natures on an optimal FeCeTiO x (1) (Fe/Ce molar ratio = 1.0) was responsible for an enhanced cyclic stability. The lattice expansion by Ce-incorporation into the Fe/TiO 2 structures not only enhanced charge transport rates but also generated thermally stable trigonal ilmenite FeTiO 3 phases. These larger oxygen storage capacity of CeO 2 on the FeCeTiO x (1) also revealed an excellent 5-times cyclic stability with a stable C 2 H 4 formation rate and C 2 H 4 selectivity of 84.1% for a reduction step of ethane as well as an excellent CO 2 activation to CO at 600 °C for an oxidation step (named as CL-ODH). Those superior catalytic performances on the FeCeTiO x (1) were attributed to the partial formation of FeTiO 3 phases, which caused an improved lattice oxygen mobility by CeO 2 contribution with its higher oxygen storage nature and facile redox property. The large amount of non-stoichiometric surface oxygens at a higher Fe/Ce ratio above 2 mainly caused an enhanced CO 2 byproduct formation by the full oxidation of C 2 H 6 . The synergy effects on the FeCeTiO x (1) were attributed to facile redox properties of lattice oxygen vacant sites by partially forming the strongly interacted stable FeTiO 3 phases with its resistance to coke depositions.

A robust approach for designing N‐doped reduced graphene oxide/polyaniline nanocomposite‐based electrodes for efficient flexible supercapacitors

Abstract2D multilayered reduced graphene oxide (rGO) has received enormous research interest as a potential electrode material for flexible supercapacitor (FSC), owing to its excellent electrochemical and mechanical properties. However, rGO suffers from the restacking of graphene (GN) layers, lower electrical conductivity resulting from the residual oxygen functional groups and the relatively poor real‐time electrochemical performance. One of the finest ways overcoming the drawbacks of rGO by doping heteroatom into GN network and surface modification to enhance its electrochemical properties. In this work, a simple and robust approach for designing an efficient and high‐performance flexible electrode with nitrogen‐doped reduced graphene oxide (N‐rGO) framework coupled with surface modification through in situ chemical polymerization with aniline to form a long‐range interconnected polyaniline (PANI) nanostructure is presented. In a two‐electrode system, PANI/N‐rGO flexible electrode has delivered a higher specific capacitance of 322 F g−1 at a current density of 1 A g−1. Further, the composite exhibited notable cyclic stability over 1000 charge–discharge cycles. Surface‐modified in‐situ grown PANI nanostructures on N‐rGO nanosheets prevent the volume changes that occur in PANI during the charge–discharge process, and offer a higher charge transportation rate throughout the surface area. As a result of enhanced electrochemical properties, PANI/N‐rGO composites provide a feasible route for designing FSCs.

The Influence of Electrolyte Type on Kinetics of Redox Processes in the Polymer Films of Ni(II) Salen-Type Complexes.

Electrodes modified with polymers derived from the complexes [Ni(salcn)], [Ni(salcn(Me))] and [Ni(salcn(Bu))] were obtained in order to study the kinetics of electrode processes occurring in polymer films, depending on the thickness of the films, the type of electrolyte and the solvent. FTIR and EQCM methods were used to determine the type of mass transported into polymer films during anode processes and the number of moles of ions and solvent. The rate of charge transport through films was determined by the cyclic voltammetry method, by the quantity cD1/2. It was shown that the charge transport was determined by the transport of anions. The kinetics were most efficient for poly[Ni(salcn(Bu))] modified electrodes, obtained from TBAPF6 and working in TBAClO4 and TBABF4. It was also shown that a solvent with a higher DN value and lower viscosity (MeCN) facilitated the transport of the charge through polymer films.

Preparation of Bi/BiOBr sensitized titania nanorod arrays via a one-pot solvothermal method and construction of kanamycin photoelectrochemical aptasensors

Photoactive Bi/BiOBr/TiO2 NRA composites displayed an efficient visible light response and fast charge transport rate and were used to construct sensitive kanamycin photoelectrochemical aptasensors.

Facile synthesis of MoS2/CuS nanoflakes as high performance electrocatalysts for hydrogen evolution reaction

The fabrication of metal sulfides heterostructure is a promising strategy for enhancing catalytic activity. Herein, the MoS2/CuS heterostructure was successfully grown on carbon cloth (MoS2/CuS/CC) through an efficient method. The SEM results confirmed that the fabricated MoS2/CuS/CC composites have a flake morphology, which can not only improves the surface area but also offers ample surface catalytic active sites. Particularly, the optimized MoS2/CuS/CC-2 electrocatalyst showed a small overpotential of 85 mV@10 mA cm−2 and exceptional long-term cycling durability for hydrogen evolution in 1 M KOH. The outstanding catalytic activity is attributed to the fact that the combination of MoS2 with CuS can greatly enhance the charge transport rate and improve the structural stability. These results suggest that the MoS2/CuS/CC heterostructure is a potential electrocatalyst for hydrogen production.