Orienting Active Crystal Planes of New Class Lacunaris Fe2 PO5 Polyhedrons for Robust Water Oxidation in Alkaline and Neutral Media

2018 ◽  
Vol 28 (35) ◽  
pp. 1801397 ◽  
Author(s):  
Yunzhen Wu ◽  
Yanan Meng ◽  
Jungang Hou ◽  
Shuyan Cao ◽  
Zhanming Gao ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Active Crystal ◽  
New Class ◽  
Neutral Media

Tuning the morphological and electronic structure of amorphous nickel-based electrocatalysts by anion regulation for water oxidation in neutral media

2019 ◽  
Vol 6 (11) ◽  
pp. 3093-3096 ◽  
Author(s):  
Gang Yuan ◽  
Yujie Hu ◽  
Qiwei Wang ◽  
Zihan Wang ◽  
Li Wang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
High Activity ◽  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Neutral Media ◽  
Neutral Conditions ◽  
Tunable Morphology

Self-supported water oxidation catalysts with high activity under neutral conditions were fabricated with tunable morphology and electronic structure by anion regulation.

scholarly journals Homogeneous photochemical water oxidation with metal salophen complexes in neutral media

2019 ◽  
Vol 18 (11) ◽  
pp. 2782-2791 ◽  
Author(s):  
Md. Ali Asraf ◽  
Chizoba I. Ezugwu ◽  
C. M. Zakaria ◽  
Francis Verpoort
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Neutral Ph ◽  
Earth Abundant ◽  
Neutral Media

The development of water oxidation catalysts based on Earth-abundant metals that can function at neutral pH remains a basic chemical challenge.

Investigation of Amorphous Mixed-Metal (Oxy)Fluorides as a New Class of Water Oxidation Electrocatalysts

2019 ◽  
Author(s):  
Kévin Lemoine ◽  
Jérôme Lhoste ◽  
Annie Hémon-Ribaud ◽  
Nina Heidary ◽  
Vincent Maisonneuve ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Spectroscopic Characterization ◽  
Alkaline Electrolyte ◽  
Fluoride Ions ◽  
Mixed Metal ◽  
New Class ◽  
Excellent Activity ◽  
Earth Abundant ◽  
Structure Modulation ◽  
High Electronegativity

<p>The development of electrocatalysts for the oxygen evolution reaction (OER) is one of the principal challenges in the area of renewable energy research. Within this context, mixed-metal oxides have recently emerged as the highest performing OER catalysts. Their structural and compositional modification to further boost their activity is crucial to the wide-spread use of electrolysis technologies. In this work, we investigated a series of mixed-metal F-containing materials as OER catalysts to probe possible benefits of the high electronegativity of fluoride ions. We found that crystalline hydrated fluorides, CoFe<sub>2</sub>F<sub>8</sub>(H<sub>2</sub>O)<sub>2</sub>, NiFe<sub>2</sub>F<sub>8</sub>(H<sub>2</sub>O)<sub>2, </sub>and amorphous oxyfluorides, NiFe<sub>2</sub>F<sub>4.4</sub>O<sub>1.8 </sub>and CoFe<sub>2</sub>F<sub>6.6</sub>O<sub>0.7, </sub>feature excellent activity and stability for the OER in alkaline electrolyte. Subsequent electroanalytical and spectroscopic characterization hinted that the electronic structure modulation conferred by the fluoride ions aided their reactivity. Finally, the best catalyst of the set, NiFe<sub>2</sub>F<sub>4.4</sub>O<sub>1.8</sub>, was applied as anode in an electrolyzer comprised solely of earth-abundant materials.</p>

Base-enhanced electrochemical water oxidation by a nickel complex in neutral aqueous solution

2019 ◽  
Vol 55 (43) ◽  
pp. 6122-6125 ◽  
Author(s):  
Lu-Hua Zhang ◽  
Fengshou Yu ◽  
Yumeng Shi ◽  
Fei Li ◽  
Henan Li
Keyword(s):  
Aqueous Solution ◽  
Water Oxidation ◽  
Nickel Complex ◽  
Neutral Aqueous Solution ◽  
Neutral Media ◽  
Low Overpotential

Electrochemical water oxidation catalyzed by a homogeneous Ni complex at low overpotential in neutral media.

Water splitting in near-neutral media: using an Mn–Co-based nanowire array as a complementary electrocatalyst

2017 ◽  
Vol 5 (24) ◽  
pp. 12091-12095 ◽  
Author(s):  
Shuai Hao ◽  
Yingchun Yang
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Nanowire Array ◽  
Carbon Cloth ◽  
Neutral Media

A Mn–Co–borate nanowire array on carbon cloth (Mn–Co–Bi/CC) acts as an efficient electrocatalyst for water oxidation with an overpotential of 366 mV to drive 10 mA cm−2 in 0.5 M K-Bi. The two-electrode electrolyser using Mn–Co–Bi/CC as the anode and MnCo2O4/CC as the cathode drives 10 mA cm−2 at 1.97 V.

scholarly journals Investigation of Amorphous Mixed-Metal (Oxy)Fluorides as a New Class of Water Oxidation Electrocatalysts

2019 ◽  
Author(s):  
Kévin Lemoine ◽  
Jérôme Lhoste ◽  
Annie Hémon-Ribaud ◽  
Nina Heidary ◽  
Vincent Maisonneuve ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Spectroscopic Characterization ◽  
Alkaline Electrolyte ◽  
Fluoride Ions ◽  
Mixed Metal ◽  
New Class ◽  
Excellent Activity ◽  
Earth Abundant ◽  
Structure Modulation ◽  
High Electronegativity

<p>The development of electrocatalysts for the oxygen evolution reaction (OER) is one of the principal challenges in the area of renewable energy research. Within this context, mixed-metal oxides have recently emerged as the highest performing OER catalysts. Their structural and compositional modification to further boost their activity is crucial to the wide-spread use of electrolysis technologies. In this work, we investigated a series of mixed-metal F-containing materials as OER catalysts to probe possible benefits of the high electronegativity of fluoride ions. We found that crystalline hydrated fluorides, CoFe<sub>2</sub>F<sub>8</sub>(H<sub>2</sub>O)<sub>2</sub>, NiFe<sub>2</sub>F<sub>8</sub>(H<sub>2</sub>O)<sub>2, </sub>and amorphous oxyfluorides, NiFe<sub>2</sub>F<sub>4.4</sub>O<sub>1.8 </sub>and CoFe<sub>2</sub>F<sub>6.6</sub>O<sub>0.7, </sub>feature excellent activity and stability for the OER in alkaline electrolyte. Subsequent electroanalytical and spectroscopic characterization hinted that the electronic structure modulation conferred by the fluoride ions aided their reactivity. Finally, the best catalyst of the set, NiFe<sub>2</sub>F<sub>4.4</sub>O<sub>1.8</sub>, was applied as anode in an electrolyzer comprised solely of earth-abundant materials.</p>

scholarly journals Cobalt Metal–Organic Framework Based on Layered Double Nanosheets for Enhanced Electrocatalytic Water Oxidation in Neutral Media

2020 ◽  
Vol 142 (45) ◽  
pp. 19198-19208
Author(s):  
Silvia Gutiérrez-Tarriño ◽  
José Luis Olloqui-Sariego ◽  
Juan José Calvente ◽  
Guillermo Mínguez Espallargas ◽  
Fernando Rey ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Cobalt Metal ◽  
Metal Organic ◽  
Neutral Media ◽  
Organic Framework
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