Non-equilibrium fractal growth of MoS2 for electrocatalytic hydrogen evolution

CrystEngComm ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 478-486 ◽  
Author(s):  
Taejin Park ◽  
Changdeuck Bae ◽  
Hyangsook Lee ◽  
Mirine Leem ◽  
Hoijoon Kim ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Heating Rate ◽  
Hydrogen Evolution ◽  
Vapor Deposition ◽  
Rapid Heating ◽  
Chemical Vapor ◽  
Fractal Growth ◽  
Reaction Space ◽  
Rapid Heating Rate ◽  
Non Equilibrium

Non-equilibrium fractal growth of MoS2 was induced by establishing an extremely Mo rich chemical vapor deposition (CVD) environment using a rapid heating rate in a confined reaction space.

Fractal growth of sp3-bonded 5H-BN microcones by plasma-assisted laser chemical vapor deposition

2006 ◽  
Vol 99 (12) ◽  
pp. 123512 ◽  
Author(s):  
Shojiro Komatsu ◽  
Daisuke Kazami ◽  
Hironori Tanaka ◽  
Yusuke Moriyoshi ◽  
Masaharu Shiratani ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Laser Chemical Vapor Deposition ◽  
Fractal Growth

Hierarchical carbon–silicon nanowire heterostructures for the hydrogen evolution reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 13936-13941 ◽  
Author(s):  
Joonhee Moon ◽  
Uk Sim ◽  
Dong Jin Kim ◽  
Hyo-Yong Ahn ◽  
Junghyun An ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Vapor Deposition ◽  
Silicon Nanowire ◽  
Direct Synthesis ◽  
Chemical Vapor ◽  
Cu Foil ◽  
Hierarchical Carbon ◽  
Carbon Nanowires

A facile method for the direct synthesis of carbon nanowires (CNWs) on a SiNW electrode using a chemical vapor deposition (CVD) system with copper (Cu) vapor obtained from a floating Cu foil has been developed.

Growth of Large-Area Graphene Single Crystals in Confined Reaction Space with Diffusion-Driven Chemical Vapor Deposition

2015 ◽  
Vol 27 (18) ◽  
pp. 6249-6258 ◽  
Author(s):  
Chiao-Chen Chen ◽  
Chia-Jung Kuo ◽  
Chun-Da Liao ◽  
Chin-Fu Chang ◽  
Chi-Ang Tseng ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Single Crystals ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Large Area ◽  
Reaction Space

scholarly journals Non-Equilibrium Acceptor Concentration in GaN:Mg Grown by Metalorganic Chemical Vapor Deposition

2003 ◽  
Vol 798 ◽  
Author(s):  
Y. Gong ◽  
Y. Gu ◽  
Igor L. Kuskovsky ◽  
G. F. Neumark ◽  
J. Li ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Solubility Limit ◽  
Organic Chemical ◽  
Original Sample ◽  
Acceptor Concentration ◽  
Order Of Magnitude ◽  
Hall Effect Measurements ◽  
Non Equilibrium

ABSTRACTIt is shown that the high p-type conductivity in GaN:Mg, grown by metal-organic chemical vapor deposition followed by post-growth annealing, is due to non-equilibrium acceptor concentrations. A series of samples cut from a single GaN:Mg wafer, which initially had undergone rapid thermal annealing (RTA) after growth, has been investigated. The samples were annealed at various temperatures in nitrogen ambient for over 12 hours, and temperature-dependent Hall effect measurements were performed. For samples annealed at temperatures higher than 850 °C, the hole concentrations decrease by at least an order of magnitude, compared with the original sample. This behavior is explained by an Mg acceptor concentration in excess of its equilibrium solubility limit in the original sample; thus, at high enough temperatures, in the absence of hydrogen, Mg acceptors diffuse either to form electrically inactive precipitates or are eliminated. It is worth noting that the acceptor activation energy remains the same for all samples.

scholarly journals Growth of Multiorientated Polycrystalline MoS2 Using Plasma-Enhanced Chemical Vapor Deposition for Efficient Hydrogen Evolution Reactions

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1465
Author(s):  
Na Liu ◽  
Jeonghun Kim ◽  
Jeonghyeon Oh ◽  
Quang Trung Nguyen ◽  
Bibhuti Bhusan Sahu ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Hydrogen Evolution ◽  
Vapor Deposition ◽  
Active Sites ◽  
Chemical Vapor ◽  
Interlayer Spacing ◽  
Acidic Media ◽  
Energy Technologies ◽  
Hydrogen Evolution Reactions ◽  
Excellent Stability

Molybdenum disulfide (MoS2) has attracted considerable attention as a promising electrocatalyst for the hydrogen evolution reaction (HER). However, the catalytic HER performance of MoS2 is significantly limited by the few active sites and low electrical conductivity. In this study, the growth of multiorientated polycrystalline MoS2 using plasma-enhanced chemical vapor deposition (PECVD) for the HER is achieved. The MoS2 is synthesized by sulfurizing a sputtered pillar-shaped Mo film. The relatively low growth temperature during the PECVD process results in multiorientated MoS2 with an expanded interlayer spacing of ~0.75 nm, which provides abundant active sites, a reduced Gibbs free energy of H adsorption, and enhanced intralayer conductivity. In HER applications, the PECVD-grown MoS2 exhibits an overpotential value of 0.45 V, a Tafel slope of 76 mV dec−1, and excellent stability in strong acidic media for 10 h. The high HER performance achieved in this study indicates that two-dimensional MoS2 has potential as an electrocatalyst for next-generation energy technologies.

Controlled fractal growth of transition metal dichalcogenides

Nanoscale ◽  
2019 ◽  
Vol 11 (36) ◽  
pp. 17065-17072
Author(s):  
Peijian Wang ◽  
Siyuan Luo ◽  
Lincoln Boyle ◽  
Hao Zeng ◽  
Shaoming Huang
Keyword(s):  
Chemical Vapor Deposition ◽  
Transition Metal ◽  
Vapor Deposition ◽  
Morphological Evolution ◽  
Transition Metal Dichalcogenides ◽  
Chemical Vapor ◽  
Fractal Growth ◽  
Metal Dichalcogenides

We report controlled fractal growth of atomically thin transition metal dichalcogenides (TMDCs) by chemical vapor deposition, with morphological evolution from dendritic to triangular.

Pressure-controlled chemical vapor deposition of graphene as catalyst for solar hydrogen evolution reaction

2019 ◽  
Vol 335 ◽  
pp. 395-401 ◽  
Author(s):  
Chih-Pin Han ◽  
Chih-Jung Chen ◽  
Chen-Chih Hsu ◽  
Anirudha Jena ◽  
Ho Chang ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Solar Hydrogen ◽  
Pressure Controlled

Controlled Growth of Edge‐Enriched ReS 2 Nanoflowers on Carbon Cloth Using Chemical Vapor Deposition for Hydrogen Evolution

2020 ◽  
Vol 7 (22) ◽  
pp. 2001196
Author(s):  
Yajuan Zhao ◽  
Jianguo Li ◽  
Jianfeng Huang ◽  
Liangliang Feng ◽  
Liyun Cao ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Hydrogen Evolution ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Carbon Cloth ◽  
Controlled Growth
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