Enhanced electrolytic oxygen evolution by the synergistic effects of trimetallic FeCoNi boride oxides immobilized on polypyrrole/reduced graphene oxide

2020 ◽  
Vol 8 (4) ◽  
pp. 1821-1828 ◽  
Author(s):  
Hui Mao ◽  
Xi Guo ◽  
Yuanlin Fu ◽  
Haoran Yang ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Synergistic Effects ◽  
Reduced Graphene

Trimetallic FeCoNiBOx/PPy/rGO nanocomposites exhibit optimal OER activity due to the synergistic effects of each component.

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.

rGO wrapped trimetallic sulfide nanowires as an efficient bifunctional catalyst for electrocatalytic oxygen evolution and photocatalytic organic degradation

2020 ◽  
Vol 8 (27) ◽  
pp. 13558-13571 ◽  
Author(s):  
Bin Wang ◽  
Yuanfu Chen ◽  
Xinqiang Wang ◽  
Jeyagopal Ramkumar ◽  
Xiaojuan Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Metal Organic Framework ◽  
Bifunctional Catalyst ◽  
Organic Degradation ◽  
Reduced Graphene ◽  
Metal Organic ◽  
Organic Framework

A novel metal–organic framework (MOF)-derived Janus-type nanoarchitecture is constructed with reduced graphene oxide wrapped trimetallic sulfide nanowires.

A novel strategy to boost the oxygen evolution reaction activity of NiFe-LDHs with in situ synthesized 3D porous reduced graphene oxide matrix as both the substrate and electronic carrier

2019 ◽  
Vol 43 (17) ◽  
pp. 6555-6562 ◽  
Author(s):  
Yanfang Gu ◽  
Yuanqiang Wang ◽  
Wei An ◽  
Yong Men ◽  
Yichuan Rui ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Stable Operating ◽  
Reduced Graphene ◽  
Oxide Matrix ◽  
Novel Strategy ◽  
Operating Potential

NiFe-LDHs anchored on a 3D rGO matrix achieved a small overpotential and a relatively stable operating potential.

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