Novel cobalt quantum dot/graphene nanocomposites as highly efficient electrocatalysts for water splitting

Nanoscale ◽  
2016 ◽  
Vol 8 (3) ◽  
pp. 1485-1492 ◽  
Author(s):  
Maduraiveeran Govindhan ◽  
Brennan Mao ◽  
Aicheng Chen
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Quantum Dot ◽  
High Activity ◽  
Reduced Graphene Oxide ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Graphene Nanocomposites ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

A non-noble metal based electrocatalyst comprised of Co quantum dots and reduced graphene oxide sheets exhibits high activity and stability for oxygen evolution.

Nb2O5/graphene nanocomposites for electrochemical energy storage

RSC Advances ◽  
2015 ◽  
Vol 5 (74) ◽  
pp. 59997-60004 ◽  
Author(s):  
Paulraj Arunkumar ◽  
Ajithan G. Ashish ◽  
Binson Babu ◽  
Som Sarang ◽  
Abhin Suresh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Electrochemical Energy Storage ◽  
Graphene Nanocomposites ◽  
Simple Hydrothermal Method ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets ◽  
Electrochemical Energy

Here we report the synthesis of Nb2O5/graphene nanocomposites, through a simple hydrothermal method, with Nb2O5 nanoparticles anchored on reduced graphene oxide sheets.

CoP2nanoparticles on reduced graphene oxide sheets as a super-efficient bifunctional electrocatalyst for full water splitting

2016 ◽  
Vol 4 (13) ◽  
pp. 4686-4690 ◽  
Author(s):  
Jianmei Wang ◽  
Wenrong Yang ◽  
Jingquan Liu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Water Splitting ◽  
Bifunctional Electrocatalyst ◽  
Graphene Oxide Sheet ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

CoP2nanoparticles decorated reduced graphene oxide sheet (CoP2/RGO) acts as a super-efficient bifunctional electrocatalyst for full water splitting.

scholarly journals Electrochemical impacts of sheet-like hafnium phosphide and hafnium disulfide catalysts bonded with reduced graphene oxide sheets for bifunctional oxygen reactions in alkaline electrolytes

RSC Advances ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 2599-2607 ◽  
Author(s):  
Mayilvel Dinesh Meganathan ◽  
Taizhong Huang ◽  
Hengyi Fang ◽  
Jianfeng Mao ◽  
Guoxin Sun
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
High Catalytic Activity ◽  
Oxygen Reduction Reactions ◽  
Reduced Graphene ◽  
Alkaline Electrolytes ◽  
Graphene Oxide Sheets

Sheet-like structured hafnium phosphide (HfP) and hafnium disulphide (HfS2) catalysts show high catalytic activity for both oxygen evolution and oxygen reduction reactions, which are determined by the compositional anion ions.

Dual-Heteroatom-Doped Reduced Graphene Oxide Sheets Conjoined CoNi-Based Carbide and Sulfide Nanoparticles for Efficient Oxygen Evolution Reaction

2020 ◽  
Vol 12 (36) ◽  
pp. 40186-40193 ◽  
Author(s):  
Mohamed Barakat Zakaria ◽  
Dehua Zheng ◽  
Ulf-peter Apfel ◽  
Takahiro Nagata ◽  
El-Refaie S. Kenawy ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

MoS2 quantum dot decorated RGO: a designed electrocatalyst with high active site density for the hydrogen evolution reaction

2015 ◽  
Vol 3 (43) ◽  
pp. 21772-21778 ◽  
Author(s):  
Feng Li ◽  
Jing Li ◽  
Zhuo Cao ◽  
Xiaoqing Lin ◽  
Xinzhe Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Quantum Dot ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Site ◽  
Site Density ◽  
Reduced Graphene ◽  
Highly Effective

In the present work, MoS2 quantum dots (MoS2 QDs) decorated on reduced graphene oxide (RGO) as highly effective electrocatalysts were synthesized by a facile sonication method for the hydrogen evolution reaction (HER).

Co–Fe Bimetal Phosphate Composite Loaded on Reduced Graphene Oxide for Oxygen Evolution

NANO ◽  
2019 ◽  
Vol 14 (01) ◽  
pp. 1950003 ◽  
Author(s):  
Guoxing Zhu ◽  
Xulan Xie ◽  
Lisong Xiao ◽  
Xiaoyun Li ◽  
Xiaoping Shen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Synergistic Effects ◽  
Water Electrolysis ◽  
Onset Potential ◽  
Reduced Graphene

Development of high-performance nonprecious metal-based catalysts for oxygen evolution reaction (OER) is crucial to improve the efficiency of water electrolysis and photoelectrochemical water splitting for harvesting and storage of solar energy. Herein, Co–Fe phosphates and their composites with reduced graphene oxide (rGO) were prepared by a simple hydrothermal method, which then acted as oxygen evolution reaction catalysts. In 1.0 M KOH aqueous solution, the as-obtained optimal composite, Co–Fe phosphate/rGO, can catalyze oxygen evolution reaction with a very sharp onset potential and a small over-potential of 338[Formula: see text]mV to achieve a current density of 10[Formula: see text]mA[Formula: see text]cm[Formula: see text]. It was found that in these Co–Fe phosphates, the optimal Co:Fe ratio is 0.75:0.25. The excellent electrocatalytic performance of the Co–Fe phosphate/rGO composite would benefit from the synergistic effects between Fe and Co species, as well as rGO substrate providing conductive channels. The formed Co–Fe phosphate/rGO electrocatalysts can be the promising replacement of precious metal-based catalysts for more practical and cost-efficient water splitting.

Boron-doped graphene as electrocatalytic support for iridium oxide for oxygen evolution reaction

2020 ◽  
Vol 10 (19) ◽  
pp. 6599-6610 ◽  
Author(s):  
Prerna Joshi ◽  
Hsin-Hui Huang ◽  
Rohit Yadav ◽  
Masanori Hara ◽  
Masamichi Yoshimura
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Iridium Oxide ◽  
Boron Doped ◽  
Reduced Graphene ◽  
Doped Graphene ◽  
Electrochemical Water Splitting

The present work details the development of IrO2 nanoparticles (nps) supported on B-doped reduced graphene oxide as an oxygen evolution reaction (OER) electrocatalyst for electrochemical water splitting.

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