Highly efficient water splitting over a RuO2/F-doped graphene electrocatalyst with ultra-low ruthenium content

2020 ◽  
Vol 7 (11) ◽  
pp. 2188-2194 ◽  
Author(s):  
Zhenglong Fan ◽  
Fan Liao ◽  
Huixian Shi ◽  
Yang Liu ◽  
Mingwang Shao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Alkaline Medium ◽  
Current Density ◽  
Neutral Medium ◽  
Highly Efficient ◽  
Doped Graphene ◽  
A Current

A RuO2/F-graphene catalyst with a low Ru content of 6.9 wt% only needs potentials of 1.56 V in alkaline medium and 1.73 V in neutral medium to reach a current density of 10 mA cm−2 for electrocatalytic water splitting.

An advanced and highly efficient Ce assisted NiFe-LDH electrocatalyst for overall water splitting

2020 ◽  
Vol 4 (1) ◽  
pp. 312-323 ◽  
Author(s):  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Bezawit Z. Desalegan ◽  
Jeong Gil Seo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Room Temperature ◽  
Cell Voltage ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
A Cell ◽  
A Current

A room-temperature synthesized NiFeCe2 electrocatalyst delivered a current density of 10 mA cm−2 at a cell voltage of 1.59 V when used as the electrolyzer.

Ultra-thin N-doped-graphene encapsulated Ni nanoparticles coupled with MoO2 nanosheets for highly efficient water splitting at large current density

2020 ◽  
Vol 8 (29) ◽  
pp. 14545-14554 ◽  
Author(s):  
Guangfu Qian ◽  
Guangtao Yu ◽  
Jiajia Lu ◽  
Lin Luo ◽  
Ting Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Ni Nanoparticles ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Large Current ◽  
Doped Graphene ◽  
Large Current Density

Ultra-thin N-doped-graphene encapsulated Ni nanoparticles coupled with MoO2 nanosheets are prepared for HER and OER. As used for overall water splitting, it can work for 196 h at 1000 mA cm−2.

Highly efficient overall water splitting over a porous interconnected network by nickel cobalt oxysulfide interfacial assembled Cu@Cu2S nanowires

2020 ◽  
Vol 8 (29) ◽  
pp. 14746-14756
Author(s):  
Duy Thanh Tran ◽  
Van Hien Hoa ◽  
Huu Tuan Le ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
Water Splitting ◽  
Alkaline Medium ◽  
Nanowire Arrays ◽  
Interconnected Network ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Nickel Cobalt

A highly efficient electrocatalyst based on nickel cobalt oxysulfide interfacial assembled Cu@Cu2S nanowire arrays was constructed for simultaneously accelerating HER and OER in alkaline medium.

High Reversible Capacity of Nitrogen-Doped Graphene as an Anode Material for Lithium-Ion Batteries

2014 ◽  
Vol 1070-1072 ◽  
pp. 459-464
Author(s):  
Chang Jing Fu ◽  
Shuang Li ◽  
Qian Wang
Keyword(s):  
Graphene Oxide ◽  
Electron Microscope ◽  
Lithium Ion Batteries ◽  
Current Density ◽  
Lithium Ion ◽  
X Ray ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
A Current

Nitrogen-doped graphene (N-rGO) was synthesized in the process of preparation of reduced graphene oxide from the expanded graphite through the improved Hummers’ method. The morphology, structure and composition of nitrogen-doped graphene oxide (GO) and N-rGO were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The nitrogen content of N-rGO was approximately 5 at.%. The electrochemical performances of N-rGO as anode materials for lithium-ion batteries were evaluated in coin-type cells versus metallic lithium. Results showed that the obtained N-rGO exhibited a higher reversible specific capacity of 519 mAh g-1 at a current density of 100 mA⋅g-1 and 207.5 mAh⋅g-1 at a current density of 2000 mA⋅g-1. The excellent cycling stability and high-rate capability of N-rGO as anodes of lithium-ion battery were attributed to the large number of surface defects caused by the nitrogen doping, which facilitates the fast transport of Li-ion and electron on the interface of electrolyte/electrode.

Efficient bifunctional catalysts for overall water splitting: porous Fe–Mo oxide hybrid nanorods

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7116-7123 ◽  
Author(s):  
Wei Chen ◽  
Guangfu Qian ◽  
Qinglian Xu ◽  
Chen Yu ◽  
Mengya Yu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Current Density ◽  
Bifunctional Catalysts ◽  
Binary Metal ◽  
Overall Water Splitting ◽  
Binary Metal Oxide ◽  
A Current

In this work, binary metal oxide porous nanorods are synthesized and exhibit evidently small overpotentials for OER and HER. They also display remarkable stability by holding a current density of ±200 mA cm−2 for 85 h for OER/HER.

The controlled construction of a ternary hybrid of monodisperse Ni3S4 nanorods/graphitic C3N4 nanosheets/nitrogen-doped graphene in van der Waals heterojunctions as a highly efficient electrocatalyst for overall water splitting and a promising anode material for sodium-ion batteries

2019 ◽  
Vol 7 (8) ◽  
pp. 3714-3728 ◽  
Author(s):  
Jing Yang ◽  
Shiqi Xing ◽  
Jianbin Zhou ◽  
Yun Cheng ◽  
Lei Shi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Anode Material ◽  
Van Der Waals ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

An m-Ni3S4 NRs/g-C3N4 NS/N-G hybrid with heterostructured architecture demonstrates outstanding properties for both water splitting and SIB use.

A nanocrystalline structured NiO/MnO2@nitrogen-doped graphene oxide hybrid nanocomposite for high performance supercapacitors

2017 ◽  
Vol 41 (24) ◽  
pp. 15517-15527 ◽  
Author(s):  
Sivalingam Ramesh ◽  
K. Karuppasamy ◽  
Sabeur Msolli ◽  
Hyun-Seok Kim ◽  
Heung Soo Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Current Density ◽  
High Performance ◽  
Composite Electrode ◽  
Cyclic Stability ◽  
Hybrid Nanocomposite ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
A Current

A nanocrystalline NiO@MnO2/NGO hybrid composite electrode showed specific capacitance of 1490 Fg−1 at a current density of 0.5 Ag−1 and retains 98% up to 2000 cycles indicating its good cyclic stability.

High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation

2021 ◽  
Vol 9 (15) ◽  
pp. 9753-9760
Author(s):  
Jin Wu ◽  
Renjie Xie ◽  
Xiangchen Hu ◽  
Zhiwei Nie ◽  
Yanuo Shi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
High Performance ◽  
Amorphous Iron ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting ◽  
Iron Doped ◽  
Cobalt Tungstate ◽  
Co Precipitation ◽  
A Current

The as-prepared amorphous Fe-doped CoWO4 bifunctional electrocatalyst shows a low overpotential of 259 and 118 mV to reach a current density of 10 mA cm−2 for the OER and HER in 1 M KOH, respectively.

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