scholarly journals Hydrothermal Synthesis of Polyhedral Nickel Sulfide by Dual Sulfur Source for Highly-Efficient Hydrogen Evolution Catalysis

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2115
Author(s):  
Yuan Gao ◽  
Ka Wang ◽  
Zixia Lin ◽  
Haizeng Song ◽  
Xiaomeng Duan ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrogen Evolution ◽  
Industrial Development ◽  
Nickel Sulfide ◽  
Synthesis Method ◽  
Sulfur Source ◽  
Performance Change ◽  
Highly Efficient ◽  
Hydrogen Evolution Reactions ◽  
Nonprecious Metal

Transition metal sulfides are cheap and efficient catalysts for water splitting to produce hydrogen; these compounds have attracted wide attention. Nickel sulfide (NiS2) has been studied in depth because of its simple preparation process, excellent performance and good stability. Here, we propose a modification to the hydrothermal synthesis method for the fabrication of a highly efficient and stable NiS2 electrocatalyst prepared by two different sulfur sources, i.e., sulfur powder and C3H7NaO3S2 (MPS), for application in hydrogen evolution reactions. The obtained NiS2 demonstrated excellent HER performance with an overpotential of 131 mV to drive -10 mA cm−1 in 0.5 M H2SO4 solution with 5mV performance change after 1000 cycles of stability testing. We believe that this discovery will promote the industrial development of nonprecious metal catalysts.

scholarly journals Microwave-Assisted vs. Conventional Hydrothermal Synthesis of MoS2 Nanosheets: Application towards Hydrogen Evolution Reaction

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1040 ◽  
Author(s):  
Getachew Solomon ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
Isabella Concina ◽  
Alberto Vomiero
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Crystal Morphology ◽  
Synthesis Method ◽  
Synthesis Methods ◽  
Mos2 Nanosheets ◽  
Microwave Assisted

Molybdenum sulfide (MoS2) has emerged as a promising catalyst for hydrogen evolution applications. The synthesis method mainly employed is a conventional hydrothermal method. This method requires a longer time compared to other methods such as microwave synthesis methods. There is a lack of comparison of the two synthesis methods in terms of crystal morphology and its electrochemical activities. In this work, MoS2 nanosheets are synthesized using both hydrothermal (HT-MoS2) and advanced microwave methods (MW-MoS2), their crystal morphology, and catalytical efficiency towards hydrogen evolution reaction (HER) were compared. MoS2 nanosheet is obtained using microwave-assisted synthesis in a very short time (30 min) compared to the 24 h hydrothermal synthesis method. Both methods produce thin and aggregated nanosheets. However, the nanosheets synthesized by the microwave method have a less crumpled structure and smoother edges compared to the hydrothermal method. The as-prepared nanosheets are tested and used as a catalyst for hydrogen evolution results in nearly similar electrocatalytic performance. Experimental results showed that: HT-MoS2 displays a current density of 10 mA/cm2 at overpotential (−280 mV) compared to MW-MoS2 which requires −320 mV to produce a similar current density, suggesting that the HT-MoS2 more active towards hydrogen evolutions reaction.

Synergetic coupling of Pd nanoparticles and amorphous MoS toward highly efficient electrocatalytic hydrogen evolution reactions

2018 ◽  
Vol 13 ◽  
pp. 158-165 ◽  
Author(s):  
Xinyu Liu ◽  
Shiyuan Gao ◽  
Peng Yang ◽  
Bin Wang ◽  
Jian Zhen Ou ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Pd Nanoparticles ◽  
Highly Efficient ◽  
Hydrogen Evolution Reactions

Nitrogen and sulfur co-doped porous carbon derived from human hair as highly efficient metal-free electrocatalysts for hydrogen evolution reactions

2015 ◽  
Vol 3 (16) ◽  
pp. 8840-8846 ◽  
Author(s):  
Xiaojun Liu ◽  
Weijia Zhou ◽  
Linjing Yang ◽  
Ligui Li ◽  
Zhenyuan Zhang ◽  
...  
Keyword(s):  
High Activity ◽  
Hydrogen Evolution ◽  
Porous Carbon ◽  
Human Hair ◽  
Metal Free ◽  
Highly Efficient ◽  
Hydrogen Evolution Reactions ◽  
Co Doped

N and S co-doped porous carbon derived from human hair exhibited high activity as stable metal-free electrocatalysts for HER, OER and ORR.

Stepwise synthesis of CoS2–C@CoS2 yolk–shell nanocages with much enhanced electrocatalytic performances both in solar cells and hydrogen evolution reactions

2018 ◽  
Vol 6 (25) ◽  
pp. 12056-12065 ◽  
Author(s):  
Yudi Niu ◽  
Xing Qian ◽  
Jie Zhang ◽  
Weimin Wu ◽  
Hongyu Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Hydrogen Evolution ◽  
Stepwise Synthesis ◽  
Highly Efficient ◽  
Bifunctional Electrocatalysts ◽  
Hydrogen Evolution Reactions

CoS2–C@CoS2 yolk–shell nanocages have been applied as highly efficient bifunctional electrocatalysts for both DSSCs and HERs.

scholarly journals Low-cost and highly efficient CoMoS4/NiMoS4-based electrocatalysts for hydrogen evolution reactions over a wide pH range

2016 ◽  
Vol 213 ◽  
pp. 236-243 ◽  
Author(s):  
Li Shao ◽  
Xing Qian ◽  
Xiaoying Wang ◽  
Hongmei Li ◽  
Rucai Yan ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Low Cost ◽  
Highly Efficient ◽  
Wide Ph Range ◽  
Hydrogen Evolution Reactions ◽  
Ph Range

Hydrothermal synthesis of MoS2 nanoflowers as highly efficient hydrogen evolution reaction catalysts

2014 ◽  
Vol 264 ◽  
pp. 229-234 ◽  
Author(s):  
Dezhi Wang ◽  
Zhou Pan ◽  
Zhuangzhi Wu ◽  
Zhiping Wang ◽  
Zhihong Liu
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Highly Efficient
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