Optimized electronic structure and p-band centre control engineering to enhance surface absorption and inherent conductivity for accelerated hydrogen evolution over a wide pH range

2020 ◽  
Vol 22 (26) ◽  
pp. 14537-14543
Author(s):  
Yuanzhe Wang ◽  
Dong Wang ◽  
Jiajia Gao ◽  
Xianfeng Hao ◽  
Zhiping Li ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
Electronic Configuration ◽  
Surface Absorption ◽  
Control Engineering ◽  
Wide Ph Range ◽  
Ph Range

Numerous experiments have demonstrated that an appropriate electronic configuration can effectively activate the electrocatalytic activity.

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.

Enhanced electrocatalytic activity of in situ carbon encapsulated molybdenum phosphide derived from a hybrid POM for the HER over a wide pH range

2022 ◽  
Author(s):  
Balasingh Thangadurai Jebaslinhepzybai ◽  
Elavarasan Samaraj ◽  
Thangaian Kesavan ◽  
Manickam Sasidharan ◽  
J. Arockia Selvi
Keyword(s):  
Electrocatalytic Activity ◽  
Molybdenum Phosphide ◽  
Wide Ph Range ◽  
Ph Range

Hybrid polyoxometalate derived in situ carbon encapsulated molybdenum phosphide (HPOM-MoP/C) exhibits excellent HER activity in a wide pH range.

Low-ruthenium-content NiRu nanoalloys encapsulated in nitrogen-doped carbon as highly efficient and pH-universal electrocatalysts for the hydrogen evolution reaction

2018 ◽  
Vol 6 (4) ◽  
pp. 1376-1381 ◽  
Author(s):  
You Xu ◽  
Shuli Yin ◽  
Chunjie Li ◽  
Kai Deng ◽  
Hairong Xue ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Efficient Catalyst ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Wide Ph Range ◽  
Ph Range ◽  
Nitrogen Doped Carbon

A NiRu@N–C hybrid is fabricated and tested as an efficient catalyst for the hydrogen evolution reaction in a wide pH range.

Highly Crystallized Cubic Cattierite CoS 2 for Electrochemically Hydrogen Evolution over Wide pH Range from 0 to 14

2014 ◽  
Vol 148 ◽  
pp. 170-174 ◽  
Author(s):  
Haichuan Zhang ◽  
Yingjie Li ◽  
Guoxin Zhang ◽  
Pengbo Wan ◽  
Tianhao Xu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Wide Ph Range ◽  
Ph Range

CoOx–carbon nanotubes hybrids integrated on carbon cloth as a new generation of 3D porous hydrogen evolution promoters

2017 ◽  
Vol 5 (21) ◽  
pp. 10510-10516 ◽  
Author(s):  
Jing Wang ◽  
Zhongzhe Wei ◽  
Haiyan Wang ◽  
Yiqing Chen ◽  
Yong Wang
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Hydrogen Evolution ◽  
Carbon Cloth ◽  
Wide Ph Range ◽  
Ph Range ◽  
New Generation

CoOx–CNT–CC electrodes not only displayed outstanding performance over a wide pH range, but also showed superb catalytic activity at low temperature.

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