Cu2O–reduced graphene oxide composite as a high-performance electrocatalyst for oxygen evolution reaction in alkaline media

2021 ◽  
Author(s):  
Xiaomei Xu ◽  
Qingqing An ◽  
Hao Sun ◽  
Yongchun Wang ◽  
Wenhui Shang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Alkaline Media ◽  
Oxygen Generation ◽  
Oxide Composite ◽  
Reduced Graphene

Ethylene glycol was used as an inexpensive and nontoxic reducing agent to synthesize a Cu2O–reduced graphene oxide (Cu2O–rGO) composite. This material exhibited good electrocatalytic oxygen generation performance.

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.

Electrochemical deposition of manganese oxide–phosphate–reduced graphene oxide composite and electrocatalysis of the oxygen evolution reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30552-30563 ◽  
Author(s):  
Ahamed Irshad ◽  
Nookala Munichandraiah
Keyword(s):  
Graphene Oxide ◽  
Manganese Oxide ◽  
Electrochemical Reduction ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Electrochemical Deposition ◽  
Oxygen Evolution Reaction ◽  
Oxide Composite ◽  
Reduced Graphene ◽  
Phosphate Electrolyte

The MnOx–Pi–rGO OER catalyst is prepared by the simultaneous electrochemical reduction of MnO4− ions and GO in a neutral phosphate electrolyte.

A bridge-arched and layer-structured hollow melamine foam/reduced graphene oxide composite with an enlarged evaporation area and superior thermal insulation for high-performance solar steam generation

2020 ◽  
Vol 8 (5) ◽  
pp. 2701-2711 ◽  
Author(s):  
Sen Meng ◽  
Xing Zhao ◽  
Chun-Yan Tang ◽  
Peng Yu ◽  
Rui-Ying Bao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Thermal Insulation ◽  
High Performance ◽  
High Efficiency ◽  
Insulation Layer ◽  
Steam Generation ◽  
Oxide Composite ◽  
Reduced Graphene ◽  
Solar Steam Generation

A bridge-arched integrated evaporator that introduces air as the thermal insulation layer exhibits high-efficiency solar steam generation.

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