One-step hydrothermal synthesis of honeycomb 3D graphene-like Co 9 S 8 and its catalytic characteristics for NaHCO 3 reduction by H 2 S

Hu, Baoyun; Jing, Zhenzi; Fan, Junjie; Yao, Guodong; Jin, Fangming

doi:10.1016/j.cattod.2015.09.035

Cited by 33 publications

(9 citation statements)

References 51 publications

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“…26−28 Among them, graphene support, owing to its high surface area, rich porosity, and exceptional sp 2 network structures that can significantly enhance the catalytic properties, was observed. 29 Recently, we successfully demonstrated the use of highly porous and stable three-dimensional (3D) and interconnected MoS 2 /graphene aerogels as excellent HDS catalysts. 30 But, the use of the promoter such as NiSx decorated 3D porous HDS catalyst system has not been explored yet.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, to achieve enhanced performance and stability, promoted MoS 2 is often dependent on various catalyst supports such as alumina and carbonaceous materials . Similarly, support also can play a vital role as H so carrier from donor to acceptor as demonstrated by RC model. − Among them, graphene support, owing to its high surface area, rich porosity, and exceptional sp 2 network structures that can significantly enhance the catalytic properties, was observed . Recently, we successfully demonstrated the use of highly porous and stable three-dimensional (3D) and interconnected MoS 2 /graphene aerogels as excellent HDS catalysts .…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional NiS-MoS₂/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

Lonkar

Pillai

Alhassan

2018

ACS Appl. Nano Mater.

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A simplistic and scalable method for constructing three-dimensional (3D) highly porous aerogels composed of in situ formed NiS nanoparticles anchored onto twodimensional (2D) MoS 2 /graphene assembly was reported. This process involves simple hydrothermal treatment followed by moderate thermal annealing. The as-synthesized nanohybrids were deeply investigated using several characterization techniques. The favorable interfacial interactions promoted the graphene surface to control the aggregation of layered MoS 2 and uniform decoration of in situ formed NiS nanoparticles was achieved in the resulting nanohybrids. The resulting nanostructured 3D NiS-MoS 2 /graphene assembly produced synergistic effects and displayed remarkably enhanced hydrodesulfurization (HDS) performance toward dibenzothiophene conversion. The content of NiS cocatalyst controls the hydrogen spillover in the resulting nanoheterojunction catalysts and exhibits an enhanced HDS performance. The presented synthetic approach can be applied into the large-scale production of 3D ternary heterostructured nanohybrids composed of metal sulfide/oxide, 2D MoS 2 , and graphene aerogels and opens new avenues for a plethora of applications including electrocatalysts and high-performance electrode materials for energy storage; in conjunction, it can also offer innovative pathways to fabricate hierarchical and newer functional hybrids composed of 2D materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-Dimensional NiS-MoS₂/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

Lonkar

Pillai

Alhassan

2018

ACS Appl. Nano Mater.

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“…The Co 9 S 8 /CNFs membrane displays two peaks located at 29.8° and 51.8°, and all of the diffraction peaks can be readily indexed to the cubic Co 9 S 8 phase (JCPDS no. 19‐0364, space group: Fm3m ) . XRD results indicate the successful formation of the Co/CNFs, Co 3 O 4 /CNFs, and Co 9 S 8 /CNFs membrane.…”

Section: Resultsmentioning

confidence: 93%

A Facile Strategy to Synthesize Cobalt‐Based Self‐Supported Material for Electrocatalytic Water Splitting

Zhu

et al. 2017

Part & Part Syst Charact

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Designing and developing active, robust, and noble‐metal‐free catalysts with superior stability for electrocatalytic water splitting is of critical importance but remains a grand challenge. Here, a facile strategy is provided to synthesize a series of Co‐based self‐supported electrode materials by combining electrospinning and chemical vapor deposition (CVD) technologies. The Co, Co3O4, Co9S8 nanoparticles (NPs) are formed in situ simultaneously with the formation of carbon nanofibers (CNFs) during the CVD process, respectively. The Co‐based NPs are uniformly distributed through the CNFs and they can be directly used as the electrode materials for hydrogen evolution reaction (HER) in acid and oxygen evolution reaction (OER) in alkaline. The Co9S8/CNFs membrane exhibits the best HER activity with overpotential of 165 mV at j = 10 mA cm−2 and Tafel slope of 83 mV dec−1 and OER activity with overpotential of 230 mV at j = 10 mA cm−2 and Tafel slope of 72 mV dec−1. The onion‐like graphitic layers formed around the NPs not only improve the electrical conductivity of the electrode but also prevent the separation of the NPs from the carbon matrix as well as the aggregation.

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“…Prior literature has reported the high efficiency of Co 9 S 8 on graphene toward ORR and OER electrocatalysis. , With the intention to improve electrical conductivity and increase electrocatalytically active sites of graphene-supported Co 9 S 8 (Co 9 S 8 /G), Dai et al . explored simultaneous N-doping and etching of Co 9 S 8 /G via NH 3 -plasma treatment .…”

Section: Doped Graphene As Bifunctional Oer/orr Electrocatalystmentioning

confidence: 99%

“…Prior literature has reported the high efficiency of Co 9 S 8 on graphene toward ORR and OER electrocatalysis. 189,190 the intention to improve electrical conductivity and increase electrocatalytically active sites of graphene-supported Co 9 S 8 (Co 9 S 8 /G), Dai et al explored simultaneous N-doping and etching of Co 9 S 8 /G via NH 3 -plasma treatment. 162 The resulting electrocatalyst (N-Co 9 S 8 /G) exhibited decreased distribution density of Co 9 S 8 nanoparticles on graphene, together with the manifestation of nanosized holes on the graphene material (Figure 32d−e), revealing the efficacy of plasma etching on both Co 9 S 8 and graphene.…”

Section: Doped Graphene As Bifunctional Oer/orr Electrocatalystmentioning

confidence: 99%

Two-Dimensional Materials on the Rocks: Positive and Negative Role of Dopants and Impurities in Electrochemistry

Tan

Pumera

2019

ACS Nano

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Two-dimensional (2D) materials, such as graphene and transition-metal chalcogenides, were shown in many works as very potent catalysts for industrially important electrochemical reactions, such as oxygen reduction, hydrogen and oxygen evolution, and carbon dioxide reduction. We critically discuss here the development in the field, showing that not only dopants but also impurities can have dramatic effects on catalysis. Note here that the difference between dopant and impurity is merely semantic–dopant is an impurity deliberately added to the material. We contest the general belief that all doping has a positive effect on electrocatalysis. We show that in many cases, dopants actually inhibit the electrochemistry of 2D materials. This review provides a balanced view of the field of 2D materials electrocatalysis.

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One-step hydrothermal synthesis of honeycomb 3D graphene-like Co 9 S 8 and its catalytic characteristics for NaHCO 3 reduction by H 2 S

Cited by 33 publications

References 51 publications

Three-Dimensional NiS-MoS₂/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

Three-Dimensional NiS-MoS₂/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

A Facile Strategy to Synthesize Cobalt‐Based Self‐Supported Material for Electrocatalytic Water Splitting

Two-Dimensional Materials on the Rocks: Positive and Negative Role of Dopants and Impurities in Electrochemistry

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One-step hydrothermal synthesis of honeycomb 3D graphene-like Co 9 S 8 and its catalytic characteristics for NaHCO 3 reduction by H 2 S

Cited by 33 publications

References 51 publications

Three-Dimensional NiS-MoS2/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

Three-Dimensional NiS-MoS2/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

A Facile Strategy to Synthesize Cobalt‐Based Self‐Supported Material for Electrocatalytic Water Splitting

Two-Dimensional Materials on the Rocks: Positive and Negative Role of Dopants and Impurities in Electrochemistry

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Product

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Three-Dimensional NiS-MoS₂/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

Three-Dimensional NiS-MoS₂/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts