Nanostructured amorphous Fe29Co27Ni23Si9B12 high-entropy-alloy: an efficient electrocatalyst for oxygen evolution reaction

2021 ◽  
Vol 68 ◽  
pp. 191-198 ◽  
Author(s):  
Hongyan Wang ◽  
Ran Wei ◽  
Xiumin Li ◽  
Xuli Ma ◽  
Xiaogang Hao ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Entropy Alloy ◽  
High Entropy

Low-cost high entropy alloy (HEA) for high-efficiency oxygen evolution reaction (OER)

Nano Research ◽  
2021 ◽  
Author(s):  
Lalita Sharma ◽  
Nirmal Kumar Katiyar ◽  
Arko Parui ◽  
Rakesh Das ◽  
Ritesh Kumar ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Low Cost ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Hydroxylated high-entropy alloy as highly efficient catalyst for electrochemical oxygen evolution reaction

2020 ◽  
Vol 63 (12) ◽  
pp. 2613-2619
Author(s):  
Peiyan Ma ◽  
Shichao Zhang ◽  
Mutian Zhang ◽  
Junfeng Gu ◽  
Long Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Entropy Alloy ◽  
Efficient Catalyst ◽  
High Entropy ◽  
Highly Efficient ◽  
Electrochemical Oxygen

High entropy alloy/C nanoparticles derived from polymetallic MOF as promising electrocatalysts for alkaline oxygen evolution reaction

2022 ◽  
Vol 429 ◽  
pp. 132410
Author(s):  
Shiqi Wang ◽  
Wenyi Huo ◽  
Feng Fang ◽  
Zonghan Xie ◽  
Jian Ku Shang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Low Cost, Easy Scalable High Entropy Alloy (HEA) FeCoNiZnGa for High-Efficiency Oxygen Evolution Reaction (OER)

2020 ◽  
Author(s):  
Lalita Sharma ◽  
Nirmal Kumar ◽  
Rakesh Das ◽  
Khushu Tiwari ◽  
Chandra Sekhar Tiwary ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Low Cost ◽  
Synergetic Effect ◽  
High Entropy Alloy ◽  
Electron Microscopic ◽  
High Entropy

<p>Oxygen evolution reaction (OER) is the key step involved both in water splitting devices as well as in rechargeable metal-air batteries and there is an urgent requirement for a highly stable and low-cost material for efficient OER. In this article, for the first time, electrocatalyst based on high entropy alloy (HEA) of FeCoNiZnGa has been reported for OER. Nano-crystalline high entropy alloys materials withdrew the attention of the research academia due to their emerging unique properties due to the cocktail effect and synergetic effect between the constituent elements. The existing materials (IrO<sub>2</sub>, RuO<sub>2</sub>, etc.) being utilized in the OER reaction contain precious metals. Thus, high entropy alloy made up of low-cost elements has been formulated and tested for the OER, which is found to be highly stable and more efficient. The formulation of nanocrystalline HEA (FeCoNiZnGa) utilized a unique recipe casting-cum-comminution (CCC). After electrochemical CV activation, transition metal oxides formation at the HEA surface helps in OER activities. HEA exhibits a low overpotential of 370 mV to achieve a current density of 10 mA cm<sup>-2</sup> with a very small Tafel slope of 71 mV dec<sup>-1</sup> and exceptional long term stability of electrolysis for over 10 h in 1 M KOH alkaline solution, which is extremely stable in comparison to the state-of-the-art OER electrocatalyst RuO<sub>2</sub>. Transmission electron microscopic (TEM) studies after 10 h of long term chronoamperometry testing confirmed high stability of HEA as no change in the crystal structure observed. Our work highlights the great potential of HEA towards oxygen evolution reaction which is primary reaction involved in water splitting.</p>

scholarly journals Low Cost, Easy Scalable High Entropy Alloy (HEA) FeCoNiZnGa for High-Efficiency Oxygen Evolution Reaction (OER)

2020 ◽  
Author(s):  
Lalita Sharma ◽  
Nirmal Kumar ◽  
Rakesh Das ◽  
Khushu Tiwari ◽  
Chandra Sekhar Tiwary ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Low Cost ◽  
Synergetic Effect ◽  
High Entropy Alloy ◽  
Electron Microscopic ◽  
High Entropy

<p>Oxygen evolution reaction (OER) is the key step involved both in water splitting devices as well as in rechargeable metal-air batteries and there is an urgent requirement for a highly stable and low-cost material for efficient OER. In this article, for the first time, electrocatalyst based on high entropy alloy (HEA) of FeCoNiZnGa has been reported for OER. Nano-crystalline high entropy alloys materials withdrew the attention of the research academia due to their emerging unique properties due to the cocktail effect and synergetic effect between the constituent elements. The existing materials (IrO<sub>2</sub>, RuO<sub>2</sub>, etc.) being utilized in the OER reaction contain precious metals. Thus, high entropy alloy made up of low-cost elements has been formulated and tested for the OER, which is found to be highly stable and more efficient. The formulation of nanocrystalline HEA (FeCoNiZnGa) utilized a unique recipe casting-cum-comminution (CCC). After electrochemical CV activation, transition metal oxides formation at the HEA surface helps in OER activities. HEA exhibits a low overpotential of 370 mV to achieve a current density of 10 mA cm<sup>-2</sup> with a very small Tafel slope of 71 mV dec<sup>-1</sup> and exceptional long term stability of electrolysis for over 10 h in 1 M KOH alkaline solution, which is extremely stable in comparison to the state-of-the-art OER electrocatalyst RuO<sub>2</sub>. Transmission electron microscopic (TEM) studies after 10 h of long term chronoamperometry testing confirmed high stability of HEA as no change in the crystal structure observed. Our work highlights the great potential of HEA towards oxygen evolution reaction which is primary reaction involved in water splitting.</p>

Engineering Microdomains of Oxides in High‐Entropy Alloy Electrodes toward Efficient Oxygen Evolution

2021 ◽  
pp. 2101845
Author(s):  
Zheng‐Jie Chen ◽  
Tao Zhang ◽  
Xiao‐Yu Gao ◽  
Yong‐Jiang Huang ◽  
Xiao‐Hui Qin ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
High Entropy Alloy ◽  
High Entropy

A High-Entropy Phosphate Catalyst for Oxygen Evolution Reaction

Nano Energy ◽  
2021 ◽  
pp. 106029
Author(s):  
Haiyu Qiao ◽  
Xizheng Wang ◽  
Qi Dong ◽  
Hongkui Zheng ◽  
Gang Chen ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Entropy
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