scholarly journals Laser induced MoS2/carbon hybrids for hydrogen evolution reaction catalysts

2016 ◽  
Vol 4 (18) ◽  
pp. 6824-6830 ◽  
Author(s):  
Heng Deng ◽  
Chi Zhang ◽  
Yunchao Xie ◽  
Travis Tumlin ◽  
Lily Giri ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Low Cost ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Novel Technique ◽  
Direct Laser

The direct laser writing method has emerged as a novel technique for fabricating MoS2/carbon hybrid HER catalysts with low cost, high efficiency, and flexible designability.

Force and humidity dual sensors fabricated by laser writing on polyimide/paper bilayer structure for pulse and respiration monitoring

2018 ◽  
Vol 6 (17) ◽  
pp. 4727-4736 ◽  
Author(s):  
Jiangjiang Luo ◽  
Yanbo Yao ◽  
Xiaoshuang Duan ◽  
Tao Liu
Keyword(s):  
Low Cost ◽  
Bilayer Structure ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Respiration Monitoring ◽  
Sensing Technology ◽  
Direct Laser

Paper-based sensing technology was combined with direct laser writing for designing and fabricating low-cost wearable multifunctional sensors.

Tuning the Edge-Site Activity of 2H Phase MoSe2 for Hydrogen Evolution Reaction via Sulfur Substitution and Strain Engineering

2020 ◽  
Vol 12 (10) ◽  
pp. 1446-1456
Author(s):  
Ziwei Xu ◽  
Guanghui Zhao ◽  
Mingyuan Wang ◽  
Jingjing Liang ◽  
Shahid Hussain ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
High Efficiency ◽  
Low Cost ◽  
Catalytic Efficiency ◽  
Strain Engineering ◽  
Catalyst Design ◽  
Potential Candidate

The 2H phase MoSe2 of high chemical stability and excellent catalytic activity is a promising catalyst for the hydrogen evolution reaction (HER) as a potential candidate, due to its low cost, high efficiency and abundant production. However, the HER catalytic efficiency of MoSe2 largely depends on the activity of reaction sites including the basal plane and the edges, and remains low because only the Mo edge sites are active. Herein, we have calculated the structural stability, catalytic activity, and strain engineering on sulfur substituted MoSe2 catalytic structures (Mo(Se1–xSx)2) by density functional theory. The results demonstrate that most of Mo(Se1–xSx)2 monolayers are thermodynamically stable and the HER activity of the Mo(Se1–xSx)2 monolayers can be effectively tuned by both element substitution and strain engineering with the mechanisms uncovered at the atomic level. This study provides the experiments theoretical references for the novel catalyst design of the hydrogen evolution reaction.

scholarly journals Fabrication and Electrochemical Properties of Three-Dimensional (3D) Porous Graphitic and Graphenelike Electrodes Obtained by Low-Cost Direct Laser Writing Methods

ACS Omega ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 1540-1548 ◽  
Author(s):  
Micheal Burke ◽  
Cathal Larrigy ◽  
Eoghan Vaughan ◽  
George Paterakis ◽  
Labrini Sygellou ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Low Cost ◽  
Three Dimensional ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Direct Laser

Hierarchical FeCo2S4@CoFe layered double hydroxide on Ni foam as a bifunctional electrocatalyst for overall water splitting

2020 ◽  
Vol 10 (5) ◽  
pp. 1292-1298 ◽  
Author(s):  
Yunxia Huang ◽  
Xiaojuan Chen ◽  
Shuaipeng Ge ◽  
Qiqi Zhang ◽  
Xinran Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Low Cost ◽  
Water Electrolysis ◽  
Ni Foam ◽  
Bifunctional Electrocatalyst ◽  
Double Hydroxide

Designing high-efficiency and low-cost bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of great significance to produce hydrogen by water electrolysis.

scholarly journals Polymer-Based Device Fabrication and Applications Using Direct Laser Writing Technology

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 553 ◽  
Author(s):  
Zhen-Lin Wu ◽  
Ya-Nan Qi ◽  
Xiao-Jie Yin ◽  
Xin Yang ◽  
Chang-Ming Chen ◽  
...  
Keyword(s):  
Low Cost ◽  
Device Fabrication ◽  
Polymer Materials ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Electromagnetic Devices ◽  
Direct Laser ◽  
Device Structures ◽  
Writing Technology ◽  
High Processing

Polymer materials exhibit unique properties in the fabrication of optical waveguide devices, electromagnetic devices, and bio-devices. Direct laser writing (DLW) technology is widely used for micro-structure fabrication due to its high processing precision, low cost, and no need for mask exposure. This paper reviews the latest research progresses of polymer-based micro/nano-devices fabricated using the DLW technique as well as their applications. In order to realize various device structures and functions, different manufacture parameters of DLW systems are adopted, which are also investigated in this work. The flexible use of the DLW process in various polymer-based microstructures, including optical, electronic, magnetic, and biomedical devices are reviewed together with their applications. In addition, polymer materials which are developed with unique properties for the use of DLW technology are also discussed.

FeP3 monolayer as a high-efficiency catalyst for hydrogen evolution reaction

2019 ◽  
Vol 7 (44) ◽  
pp. 25665-25671 ◽  
Author(s):  
Shuang Zheng ◽  
Tong Yu ◽  
Jianyan Lin ◽  
Huan Lou ◽  
Haiyang Xu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
High Efficiency ◽  
Low Cost ◽  
High Electrical Conductivity

An urgent and key problem in hydrogen evolution reaction (HER) is to prepare low-cost catalysts with activity comparable to that of platinum (Pt), an intrinsic large number of active sites, and high electrical conductivity.

2,2’-Dipyridylamine as Organic Molecular Electrocatalyst for Hydrogen Evolution Reaction in Acidic Electrolytes

2019 ◽  
Author(s):  
Xi Yin ◽  
Ling Lin ◽  
Hoon T. Chung ◽  
Ulises Martinez ◽  
Andrew M. Baker ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Low Cost ◽  
Membrane Electrode Assembly ◽  
Carbon Surface ◽  
Membrane Electrode ◽  
Durability Test ◽  
Onset Potential ◽  
Precious Metal Catalysts

Finding a low-cost and stable electrocatalyst for hydrogen evolution reaction (HER) as a replacement for scarce and expensive precious metal catalysts has attracted significant interest from chemical and materials research communities. Here, we demonstrate an organic catalyst based on 2,2’-dipyridylamine (dpa) molecules adsorbed on carbon surface, which shows remarkable hydrogen evolution activity and performance durability in strongly acidic polymer electrolytes without involving any metal. The HER onset potential at dpa adsorbed on carbon has been found to be less than 50 mV in sulfuric acid and in a Nafion-based membrane electrode assembly (MEA). At the same time, this catalyst has shown no performance loss in a 60-hour durability test. The HER reaction mechanisms and the low onset overpotential in this system are revealed based on electrochemical study. Density functional theory (DFT) calculations suggest that the pyridyl-N functions as the active site for H adsorption with a free energy of -0.13 eV, in agreement with the unusually low onset overpotential for an organic molecular catalyst.<br>

2,2’-Dipyridylamine as Organic Molecular Electrocatalyst for Hydrogen Evolution Reaction in Acidic Electrolytes

2019 ◽  
Author(s):  
Xi Yin ◽  
Ling Lin ◽  
Hoon T. Chung ◽  
Ulises Martinez ◽  
Andrew M. Baker ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Low Cost ◽  
Membrane Electrode Assembly ◽  
Carbon Surface ◽  
Membrane Electrode ◽  
Durability Test ◽  
Onset Potential ◽  
Precious Metal Catalysts

Finding a low-cost and stable electrocatalyst for hydrogen evolution reaction (HER) as a replacement for scarce and expensive precious metal catalysts has attracted significant interest from chemical and materials research communities. Here, we demonstrate an organic catalyst based on 2,2’-dipyridylamine (dpa) molecules adsorbed on carbon surface, which shows remarkable hydrogen evolution activity and performance durability in strongly acidic polymer electrolytes without involving any metal. The HER onset potential at dpa adsorbed on carbon has been found to be less than 50 mV in sulfuric acid and in a Nafion-based membrane electrode assembly (MEA). At the same time, this catalyst has shown no performance loss in a 60-hour durability test. The HER reaction mechanisms and the low onset overpotential in this system are revealed based on electrochemical study. Density functional theory (DFT) calculations suggest that the pyridyl-N functions as the active site for H adsorption with a free energy of -0.13 eV, in agreement with the unusually low onset overpotential for an organic molecular catalyst.<br>

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