MoS<sub>2</sub> nanotubes loaded with TiO<sub>2</sub> nanoparticles for enhanced electrocatalytic hydrogen evolution

Feng, Bo; Liu, Chun‐Tao; Yan, Weiyi; Geng, Jie; Gui-min, Wang

doi:10.1039/c9ra05041h

Cited by 14 publications

(5 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher performance of A-MoS 2 @SWCNT comes from more active sites exposed from the MoS 2 due to the introduction of SWCNT rather than SWCNT itself, which is confirmed by the poor performance of pure SWCNT. Even though the performance of A-MoS 2 @SWCNT is still inferior to the Pt/C catalyst, which has the lowest overpotential of 69 mV, the performance is comparable to recent published works related to HER performance of MoS 2 as shown in Table S1 [32][33][34][35][36][37][38][39][40][41]. After annealing at 500°C in argon, 2H-MoS 2 @SWCNT exhibits an overpotential of 277 mV, which is caused by the decrease in active sites as the basal plane being inert to HER reaction.…”

Section: Resultssupporting

confidence: 69%

“…For instances, Xie et al reported a defect-rich ultrathin MoS 2 nanosheets with a Tafel slope of 50 mV/dec [43], Ye et al showed phosphorous-doped MoS 2(1-x) P x with the Tafel slope of 57 mV/dec [44], and Luo et al designed a two-dimensional (2D) MoS 2 -confined Co(OH) 2 nanoparticle electrocatalyst with the Tafel slope of 53 mV/dec [45]. Table S1 shows the comparison of recent publications, indicating the top performance of this work [32][33][34][35][36][37][38][39][40][41].…”

Section: Energy Materials Advancesmentioning

confidence: 73%

See 1 more Smart Citation

Carbon Nanotube Supported Amorphous MoS ₂ via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

Amorphous molybdenum disulfide (MoS2) is a promising electrochemical catalyst for hydrogen evolution reaction (HER) due to more active sites exposed on the surface compared to its crystalline counterpart. In this study, a novel fast three-minute one-pot method is proposed to prepare the single-wall carbon nanotube- (SWCNT-) supported amorphous MoS2 via a microwave heating process. Compared to traditional hydro- or solvent thermal methods to prepare MoS2 which usually consume more than 10 hours, it is more promising for fast production. An overpotential at 10 mA/cm2 of amorphous MoS2@SWCNT is 178 mV, which is 99 mV and 22 mV lower than crystalline MoS2@SWCNT and pure amorphous MoS2, respectively. After running 1000 cycles of polarization, ~2% increase in overpotential is observed, indicating its good stability. The enhanced performance results from the beneficial combination of the SWCNT substrate and the amorphous microstructures. The introduction of SWCNT increases catalyst conductivity and prevents MoS2 aggregation. The amorphous microstructures of MoS2 prepared by a microwave heating method lead to more Mo edges or active sites exposed.

show abstract

Section: Resultssupporting

confidence: 69%

Section: Energy Materials Advancesmentioning

confidence: 73%

Carbon Nanotube Supported Amorphous MoS ₂ via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The long-term durability of the electrode serves as an important factor in evaluating the electrochemical material [ 52 ]. The stability of all electrodes was evaluated by applying a current of 10 mA cm −2 through chronopotentiometry for a total of 10 h, and the results are shown in Figure 8 A.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure

Park

Choi

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

In order to improve the electrochemical performance of the NiCo2O4 material, Ni ions were partially substituted with Cu2+ ions having excellent reducing ability. All of the electrodes were fabricated by growing the Ni1−xCuxCo2O4 electrode spinel-structural active materials onto the graphite felt (GF). Five types of electrodes, NiCo2O4/GF, Ni0.875Cu0.125Co2O4/GF, Ni0.75Cu0.25Co2O4/GF, Ni0.625Cu0.375Co2O4/GF, and Ni0.5Cu0.5Co2O4/GF, were prepared for application to the oxygen evolution reaction (OER). As Cu2+ ions were substituted, the electrochemical performances of the NiCo2O4-based structures were improved, and eventually the OER activities were also greatly increased. In particular, the Ni0.75Cu0.25Co2O4/GF electrode exhibited the best OER activity in a 1.0 M KOH alkaline electrolyte: the cell voltage required to reach a current density of 10 mA cm−2 was only 1.74 V (η = 509 mV), and a low Tafel slope of 119 mV dec−1 was obtained. X-ray photoelectron spectroscopy (XPS) analysis of Ni1−xCuxCo2O4/GF before and after OER revealed that oxygen vacancies are formed around active metals by the insertion of Cu ions, which act as OH-adsorption sites, resulting in high OER activity. Additionally, the stability of the Ni0.75Cu0.25Co2O4/GF electrode was demonstrated through 1000th repeated OER acceleration stability tests with a high faradaic efficiency of 94.3%.

show abstract

“…Finally, a continuous long-term operation of 1000 cycles and a 24-h chronopotentiometry 29 , 48 – 50 were conducted for the 1T/2H-MoS 2 /HDGQDs sample to test its stability. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly defective graphene quantum dots-doped 1T/2H-MoS2 as an efficient composite catalyst for the hydrogen evolution reaction

Chen,

Wu,

Soo

2023

Sci Rep

View full text Add to dashboard Cite

We present a new composite catalyst system of highly defective graphene quantum dots (HDGQDs)-doped 1T/2H-MoS2 for efficient hydrogen evolution reactions (HER). The high electrocatalytic activity, represented by an overpotential of 136.9 mV and a Tafel slope of 57.1 mV/decade, is due to improved conductivity, a larger number of active sites in 1T-MoS2 compared to that in 2H-MoS2, and additional defects introduced by HDGQDs. High-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) were used to characterize both the 1T/2H-MoS2 and GQDs components while Fourier-transform infrared spectroscopy (FTIR) was employed to identify the functional groups on the edge and defect sites in the HDGQDs. The morphology of the composite catalyst was also examined by field emission scanning electron microscopy (FESEM). All experimental data demonstrated that each component contributes unique advantages that synergistically lead to the significantly improved electrocatalytic activity for HER in the composite catalyst system.

show abstract

MoS₂ nanotubes loaded with TiO₂ nanoparticles for enhanced electrocatalytic hydrogen evolution

Abstract: Polarization curves of TiO2, MoS2-NTs and TiO2/MoS2-NTs in 0.5 M H2SO4 solution.

Cited by 14 publications

References 56 publications

Carbon Nanotube Supported Amorphous MoS ₂ via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

Carbon Nanotube Supported Amorphous MoS ₂ via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure

Highly defective graphene quantum dots-doped 1T/2H-MoS2 as an efficient composite catalyst for the hydrogen evolution reaction

Contact Info

Product

Resources

About

MoS2 nanotubes loaded with TiO2 nanoparticles for enhanced electrocatalytic hydrogen evolution

Abstract: Polarization curves of TiO2, MoS2-NTs and TiO2/MoS2-NTs in 0.5 M H2SO4 solution.

Cited by 14 publications

References 56 publications

Carbon Nanotube Supported Amorphous MoS 2 via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

Carbon Nanotube Supported Amorphous MoS 2 via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure

Highly defective graphene quantum dots-doped 1T/2H-MoS2 as an efficient composite catalyst for the hydrogen evolution reaction

Contact Info

Product

Resources

About

MoS₂ nanotubes loaded with TiO₂ nanoparticles for enhanced electrocatalytic hydrogen evolution

Carbon Nanotube Supported Amorphous MoS ₂ via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction

Carbon Nanotube Supported Amorphous MoS ₂ via Microwave Heating Synthesis for Enhanced Performance of Hydrogen Evolution Reaction