scholarly journals Selective nitrogen doping of graphene oxide by laser irradiation for enhanced hydrogen evolution activity

2018 ◽  
Vol 54 (97) ◽  
pp. 13726-13729 ◽  
Author(s):  
Wenjing Zheng ◽  
Yan Zhang ◽  
Kaiyang Niu ◽  
Tao Liu ◽  
Karen Bustillo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Laser Irradiation ◽  
Hydrogen Evolution ◽  
Nitrogen Doping ◽  
Pyridinic N

Selective nitrogen doping of graphene oxide with a high pyridinic N ratio for enhanced hydrogen evolution activity was achieved by using a laser irradiation method.

Activating Edge-Mo of 2H-MoS2 via Coordination with Pyridinic N–C for pH-Universal Hydrogen Evolution Electrocatalysis

ACS Catalysis ◽  
2021 ◽  
pp. 4486-4497
Author(s):  
Jiayi Qin ◽  
Cong Xi ◽  
Rui Zhang ◽  
Tao Liu ◽  
Peichao Zou ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Pyridinic N

scholarly journals Defect-Rich Heterogeneous MoS2/rGO/NiS Nanocomposite for Efficient pH-Universal Hydrogen Evolution

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 662 ◽  
Author(s):  
Guangsheng Liu ◽  
Kunyapat Thummavichai ◽  
Xuefeng Lv ◽  
Wenting Chen ◽  
Tingjun Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Reduced Graphene ◽  
Heterogeneous Interfaces ◽  
Wide Ph Range ◽  
Ph Range ◽  
A Current ◽  
Poor Stability

Molybdenum disulfide (MoS2) has been universally demonstrated to be an effective electrocatalytic catalyst for hydrogen evolution reaction (HER). However, the low conductivity, few active sites and poor stability of MoS2-based electrocatalysts hinder its hydrogen evolution performance in a wide pH range. The introduction of other metal phases and carbon materials can create rich interfaces and defects to enhance the activity and stability of the catalyst. Herein, a new defect-rich heterogeneous ternary nanocomposite consisted of MoS2, NiS and reduced graphene oxide (rGO) are synthesized using ultrathin αNi(OH)2 nanowires as the nickel source. The MoS2/rGO/NiS-5 of optimal formulation in 0.5 M H2SO4, 1.0 M KOH and 1.0 M PBS only requires 152, 169 and 209 mV of overpotential to achieve a current density of 10 mA cm−2 (denoted as η10), respectively. The excellent HER performance of the MoS2/rGO/NiS-5 electrocatalyst can be ascribed to the synergistic effect of abundant heterogeneous interfaces in MoS2/rGO/NiS, expanded interlayer spacings, and the addition of high conductivity graphene oxide. The method reported here can provide a new idea for catalyst with Ni-Mo heterojunction, pH-universal and inexpensive hydrogen evolution reaction electrocatalyst.

Structural damage in graphene oxide coatings onto Nb substrates upon laser irradiation

2021 ◽  
pp. 128013
Author(s):  
R.V. Tolentino-Hernandez ◽  
F.A. Garcia-Pastor ◽  
H. Baez-Medina ◽  
E. Jimenez-Melero ◽  
F. Caballero-Briones
Keyword(s):  
Graphene Oxide ◽  
Laser Irradiation ◽  
Structural Damage ◽  
Oxide Coatings

Control of the wettability of graphene oxide surface with femtosecond laser irradiation (Invited)

2020 ◽  
Vol 49 (12) ◽  
pp. 20201064-20201064
Author(s):  
王飞跃 Feiyue Wang ◽  
邹婷婷 Tingting Zou ◽  
辛巍 Wei Xin ◽  
杨建军 Jianjun Yang
Keyword(s):  
Graphene Oxide ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Irradiation ◽  
Oxide Surface
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