Synthesis of CaMn2O4-related electrocatalyst for oxygen evolution electrode of water-splitting

2014 ◽  
Vol 1640 ◽  
Author(s):  
Yuya Taki ◽  
Zhenquan Tan ◽  
Satoshi Ohara ◽  
Takashi Itoh ◽  
Yoshiaki Nakano ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electric Power ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Fossil Fuels ◽  
Weight Ratio ◽  
Synthesis Condition ◽  
Carbon Paste ◽  
Oxygen Evolving

ABSTRACTWater-splitting by using electric power produced by solar cells is promising system to produce hydrogen without fossil fuels. Oxygen evolving catalyst is, however, major problem to prevent using this system widely because precious materials are used in the catalyst. Considering from the photosynthesis II of plants, the compound of Ca-Mn-O is one of the candidates for the oxygen evolving catalyst. In this study, the synthesis condition and the oxygen evolving electrocatalytic activity of CaMn2O4•xH2O are investigated. The overpotential at 0.1 mA/cm2 was 0.28 V when using the electrode of carbon paste and CaMn2O4•H2O with the weight ratio of 3:1.

Hierarchically porous FeNi3@FeNi layered double hydroxide nanostructures: One-step fast electrodeposition and highly efficient electrocatalytic performances for overall water splitting

2021 ◽  
Author(s):  
Zihao Liu ◽  
Shifeng Li ◽  
Fangfang Wang ◽  
Mingxia Li ◽  
Yonghong Ni
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Hierarchically Porous ◽  
One Step ◽  
Double Hydroxide

FeNi-layered double hydroxide (LDH) is thought to be an excellent electrocatalyst for oxygen evolution reaction (OER), but it always shows extremely poor electrocatalytic activity toward hydrogen evolution reaction (HER) in...

Template-directed synthesis of sulphur doped NiCoFe layered double hydroxide porous nanosheets with enhanced electrocatalytic activity for the oxygen evolution reaction

2018 ◽  
Vol 6 (7) ◽  
pp. 3224-3230 ◽  
Author(s):  
Li-Ming Cao ◽  
Jia-Wei Wang ◽  
Di-Chang Zhong ◽  
Tong-Bu Lu
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Hydrogen Energy ◽  
Highly Efficient ◽  
Porous Nanosheets ◽  
Directed Synthesis ◽  
Double Hydroxide

The development of readily available, highly efficient and stable electrocatalysts for the oxygen evolution reaction (OER) is extremely significant to facilitate water splitting for the generation of clean hydrogen energy.

Morphology controlled surface sulfurized CoMn2O4 microspikes electrocatalyst for water splitting with excellent OER rate for binder-free electrocatalytic oxygen evolution

2021 ◽  
Author(s):  
Ali Bahadur ◽  
Waseem Hussain ◽  
Shahid Iqbal ◽  
Farman Ullah ◽  
Muhammad Shoaib ◽  
...  
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Binder Free ◽  
Synthesis Routes

Transition metal mixed oxides have drawn extensive interest as oxygen evolution electrocatalysts alternatives to noble metals-based material but generally involve prolonged synthesis routes and limited electrocatalytic activity and stability. Herein...

Recent progress in transition metal selenide electrocatalysts for water splitting

Nanoscale ◽  
2020 ◽  
Vol 12 (23) ◽  
pp. 12249-12262 ◽  
Author(s):  
Xinyuan Xia ◽  
Lujing Wang ◽  
Ning Sui ◽  
Vicki L. Colvin ◽  
William W. Yu
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Recent Progress ◽  
Metal Selenides

Transition metal selenides have promising electrocatalytic activity on both hydrogen and oxygen evolution reactions.

scholarly journals Ni foam electrode solution impregnated with Ni-FeX(OH)Y catalysts for efficient oxygen evolution reaction in alkaline electrolyzers

RSC Advances ◽  
2020 ◽  
Vol 10 (43) ◽  
pp. 25426-25434
Author(s):  
Dipanjan Sengupta ◽  
Stefania M. S. Privitera ◽  
Rachela Gabriella Milazzo ◽  
Corrado Bongiorno ◽  
Silvia Scalese ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Ni Foam ◽  
Oxygen Evolving ◽  
Splitting Process

Modification of Ni foam electrode by FeCl3·6H2O and HCl, towards superior oxygen-evolving electrocatalyst for water splitting process.

One-step synthesis of nickel phosphide nanowire array supported on nickel foam with enhanced electrocatalytic water splitting performance

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107859-107864 ◽  
Author(s):  
Jian Xiao ◽  
Qiying Lv ◽  
Yan Zhang ◽  
Zheye Zhang ◽  
Shuai Wang
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Nickel Foam ◽  
Nanowire Array ◽  
Bifunctional Catalyst ◽  
Nickel Phosphide ◽  
One Step

One-step synthesis of a nickel phosphide nanowire array on nickel foam, which can be used as a bifunctional catalyst for water splitting and shows an excellent electrocatalytic activity for the hydrogen and oxygen evolution reaction.

scholarly journals Tuning intrinsic catalytic activities of oxygen-evolution catalysts by doping: a comprehensive review

2021 ◽  
Author(s):  
Sivasankara Rao Ede ◽  
Zhiping Luo
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Fossil Fuels ◽  
Hydrogen Fuel ◽  
Comprehensive Review ◽  
Catalytic Activities ◽  
Electrochemical Water Splitting ◽  
Near Future ◽  
Alternative Energies

Electrochemical water splitting produces clean hydrogen fuel as one of the pivotal alternative energies for fossil fuels in the near future. However, anodic oxygen evolution reaction (OER) is a significant...

scholarly journals Solar-driven water-splitting provides a solution to the energy problem underpinning climate change

2020 ◽  
Vol 48 (6) ◽  
pp. 2865-2874
Author(s):  
James Barber
Keyword(s):  
Water Splitting ◽  
Fossil Fuels ◽  
Organic Molecules ◽  
Big Bang ◽  
Oxygenic Photosynthesis ◽  
X Ray Diffraction ◽  
Significant Step ◽  
Oxygen Evolving ◽  
The Big Bang ◽  
Sun Light

The emergence of the oxygen-evolving photosystem two complex over 2.6 billion years ago represented the ‘big bang of evolution’ on planet Earth. It allowed phototrophic organisms to use sun light as an energy source to extract electrons and protons from water, and concomitantly release oxygen. Oxygenic photosynthesis not only created an aerobic atmosphere but also removed CO2 to produce the organic molecules that make up the current global biomass and fossil fuel. In addition, it paved the way for animal life. Today extensive burning of fossil fuels is reversing the results of photosynthesis through billions of years, rapidly releasing CO2 back into the atmosphere and consequently increasing the temperature of the planet. There is an urgent need to develop new sustainable energy sources, but the choice is not obvious. My approach to this problem has been to unravel the blueprint of photosystem II (PSII) and to develop an ‘Artificial Leaf’ technology. A significant step with respect to that mission was achieved at Imperial College when we could conclude from X-ray diffraction of PSII crystals, that the water-splitting catalytic centre consists of a unique Mn3Ca2+O4 cubane structure with a fourth dangler Mn oxo-bonded to the cubane. Here I use this and more recent structures to discuss the mechanism of water splitting and O–O bond formation. Furthermore, I will address how this information can be used to design novel water-splitting catalysts and highlight recent progress in this direction. My conviction is ‘if plants can do it, we can do it — after all it is all about chemistry’.

TiO2-Polyheptazine Hybrid Photoanodes for Visible Light-Driven Water Splitting: The Effect of External Bias

2012 ◽  
Vol 1442 ◽  
Author(s):  
Michal Bledowski ◽  
Lidong Wang ◽  
Ayyappan Ramakrishnan ◽  
Radim Beranek
Keyword(s):  
Metal Oxide ◽  
Visible Light ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Co Catalyst ◽  
Co Catalysts ◽  
External Bias ◽  
Visible Light Driven ◽  
Oxygen Evolving

ABSTRACTVisible (λ > 420 nm) light-driven photooxidation of water at TiO2-polyheptazine (TiO2-PH) hybrid photoanodes loaded with two different metal oxide co-catalysts was investigated in a twoelectrode setup. As compared to TiO2-PH photoanodes loaded with colloidal IrO2, photoelectrodes modified with photodeposited CoOx oxygen-evolving co-catalyst (Co-Pi) showed both higher photocurrents and more efficient oxygen evolution. The minimum external electric bias needed to observe complete photooxidation of water to dioxygen at TiO2-PH photoanodes modified with Co-Pi was estimated to be ca. 0.6 V at pH 7.

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