Gold doping induced strong enhancement of carbon quantum dots fluorescence and oxygen evolution reaction catalytic activity of amorphous cobalt hydroxide

2018 ◽  
Vol 42 (23) ◽  
pp. 18794-18801 ◽  
Author(s):  
Pandi Muthukumar ◽  
Savarimuthu Philip Anthony
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Carbon Quantum Dots ◽  
Cobalt Hydroxide ◽  
Strong Enhancement ◽  
Gold Doping

Au doping leads to tunable and strong enhancement of SCQDs fluorescence and OER activity of amorphous Co(OH)2.

Microwave-assisted synthesis of black phosphorus quantum dots: efficient electrocatalyst for oxygen evolution reaction

2019 ◽  
Vol 7 (21) ◽  
pp. 12974-12978 ◽  
Author(s):  
Munkhbayar Batmunkh ◽  
Munkhshur Myekhlai ◽  
Abdulaziz S. R. Bati ◽  
Susanne Sahlos ◽  
Ashley D. Slattery ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Black Phosphorus ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Black Phosphorus Quantum Dots

Black phosphorus quantum dots exhibit an impressive catalytic activity for oxygen evolution reaction.

Carbon quantum dots decorated Ba0.5Sr0.5Co0.8Fe0.2O3- perovskite nanofibers for boosting oxygen evolution reaction

2019 ◽  
Vol 257 ◽  
pp. 117919 ◽  
Author(s):  
Geng Li ◽  
Shuen Hou ◽  
Liangqi Gui ◽  
Feilong Feng ◽  
Dingbin Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Carbon Quantum Dots

scholarly journals Effects of Annealing Temperature on the Oxygen Evolution Reaction Activity of Copper–Cobalt Oxide Nanosheets

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 657
Author(s):  
Geul Han Kim ◽  
Yoo Sei Park ◽  
Juchan Yang ◽  
Myeong Je Jang ◽  
Jaehoon Jeong ◽  
...  
Keyword(s):  
High Activity ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Cobalt Hydroxide ◽  
Ni Foam ◽  
Electron Conduction

Developing high performance, highly stable, and low-cost electrodes for the oxygen evolution reaction (OER) is challenging in water electrolysis technology. However, Ir- and Ru-based OER catalysts with high OER efficiency are difficult to commercialize as precious metal-based catalysts. Therefore, the study of OER catalysts, which are replaced by non-precious metals and have high activity and stability, are necessary. In this study, a copper–cobalt oxide nanosheet (CCO) electrode was synthesized by the electrodeposition of copper–cobalt hydroxide (CCOH) on Ni foam followed by annealing. The CCOH was annealed at various temperatures, and the structure changed to that of CCO at temperatures above 250 °C. In addition, it was observed that the nanosheets agglomerated when annealed at 300 °C. The CCO electrode annealed at 250 °C had a high surface area and efficient electron conduction pathways as a result of the direct growth on the Ni foam. Thus, the prepared CCO electrode exhibited enhanced OER activity (1.6 V at 261 mA/cm2) compared to those of CCOH (1.6 V at 144 mA/cm2), Co3O4 (1.6 V at 39 mA/cm2), and commercial IrO2 (1.6 V at 14 mA/cm2) electrodes. The optimized catalyst also showed high activity and stability under high pH conditions, demonstrating its potential as a low cost, highly efficient OER electrode material.

Enhanced oxygen evolution catalytic activity of NiS2 by coupling with ferrous phosphite and phosphide

2021 ◽  
Vol 5 (6) ◽  
pp. 1801-1808
Author(s):  
Jie Yu ◽  
Tao Zhang ◽  
Changchang Xing ◽  
Xuejiao Li ◽  
Xinyang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Tafel Slope ◽  
Low Overpotential

NiS2/Fe-P nanospheres were developed as an efficient oxygen evolution reaction electrocatalyst with a low overpotential (218 mV @ 10 mA cm−2 and 306 mV @ 800 mA cm−2) and Tafel slope (47.5 mV dec−1).

LaNixFe1‐xO3‐δ‐Quantum Dots/CNTs composite for High Performance Oxygen Evolution Reaction

2021 ◽  
Author(s):  
Shiqing Lu ◽  
Yangchen Wang ◽  
Yuqi Han ◽  
Ming Zhong ◽  
Haidong Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance

Nanoporous gold supported chromium-doped NiFe oxyhydroxides as high-performance catalysts for the oxygen evolution reaction

2019 ◽  
Vol 7 (16) ◽  
pp. 9690-9697 ◽  
Author(s):  
Jie-Song Sun ◽  
Yi-Tong Zhou ◽  
Rui-Qi Yao ◽  
Hang Shi ◽  
Zi Wen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Three Dimensional ◽  
Nanoporous Gold

Chromium-doped NiFe oxyhydroxide nanosheets that are quasi-vertically oriented on three-dimensional nanoporous gold exhibit superior catalytic activity towards the oxygen evolution reaction.

Ultrathin amorphous cobalt–vanadium hydr(oxy)oxide catalysts for the oxygen evolution reaction

2018 ◽  
Vol 11 (7) ◽  
pp. 1736-1741 ◽  
Author(s):  
Juzhe Liu ◽  
Yongfei Ji ◽  
Jianwei Nai ◽  
Xiaogang Niu ◽  
Yi Luo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Oxide Catalysts ◽  
Simple Strategy

A simple strategy to synthesize ultrathin, amorphous and alloyed structural cobalt–vanadium hydr(oxy)oxide catalysts with enhanced water oxidation catalytic activity.

Coupling NiCo catalysts with carbon quantum dots on hematite photoanodes for highly efficient oxygen evolution

2022 ◽  
Author(s):  
Yingpu Bi ◽  
Bin zhao ◽  
Chenchen Feng ◽  
Xiaojuan Huang ◽  
Yong Ding
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Carbon Quantum Dots ◽  
Hole Transfer ◽  
Highly Efficient ◽  
Pec Water Splitting

Highly efficient hole transfer from photoanodes to oxygen evolution catalysts is crucial for solar photoelectrochemical (PEC) water splitting. Herein, we demonstrated the coupling of NiCo catalysts with carbon quantum dots...

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