Earth-Abundant Copper-Based Bifunctional Electrocatalyst for Both Catalytic Hydrogen Production and Water Oxidation

ACS Catalysis ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 1530-1538 ◽  
Author(s):  
Xiang Liu ◽  
Huafei Zheng ◽  
Zijun Sun ◽  
Ali Han ◽  
Pingwu Du
Keyword(s):  
Hydrogen Production ◽  
Water Oxidation ◽  
Bifunctional Electrocatalyst ◽  
Earth Abundant ◽  
Catalytic Hydrogen

scholarly journals Using earth abundant materials for the catalytic evolution of hydrogen from electron-coupled proton buffers

2017 ◽  
Vol 1 (8) ◽  
pp. 1782-1787 ◽  
Author(s):  
Lewis MacDonald ◽  
Jessica C. McGlynn ◽  
Nicola Irvine ◽  
Ihfaf Alshibane ◽  
Leanne G. Bloor ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Earth Abundant ◽  
Catalytic Hydrogen

Catalytic hydrogen production from water splitting via electron-coupled proton buffers and earth abundant materials.

scholarly journals Cobalt oxide-polypyrrole nanocomposite as efficient and stable electrode material for electrocatalytic water oxidation

2021 ◽  
Author(s):  
Daniela V. Morales ◽  
Catalina N Astudillo-Neira ◽  
Veronica Anastasoaie ◽  
Baptiste Dautreppe ◽  
Bruno F Urbano ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Cobalt Oxide ◽  
Electrode Material ◽  
Water Oxidation ◽  
Earth Abundant ◽  
The Cost ◽  
Neutral Conditions

Developing electrolyzers operating under neutral or near-neutral conditions with catalysts based only on earth-abundant metals is highly desirable with a view to reduce the cost of hydrogen production from water...

Porous and amorphous cobalt hydroxysulfide core–shell nanoneedles on Ti-mesh as a bifunctional electrocatalyst for energy-efficient hydrogen production via urea electrolysis

2021 ◽  
Author(s):  
Yu Jiang ◽  
Shanshan Gao ◽  
Gongchen Xu ◽  
Xiaoming Song
Keyword(s):  
Hydrogen Production ◽  
High Activity ◽  
Energy Efficient ◽  
Bifunctional Catalyst ◽  
Core Shell ◽  
Bifunctional Electrocatalyst ◽  
Urea Electrolysis ◽  
Ti Mesh

Porous and amorphous CoSx(OH)y core–shell nanoneedles covered by numerous ultra-thin small nanosheets are synthesized successfully on Ti-mesh, and act as a high activity and stability bifunctional catalyst for urea electrolysis.

A mononuclear copper complex as bifunctional electrocatalyst for CO2 reduction and water oxidation

2021 ◽  
pp. 115106
Author(s):  
Ning-ning Shi ◽  
Wang-jing Xie ◽  
Dong-mei Zhang ◽  
Yu-Hua Fan ◽  
Lian-Sheng Cui ◽  
...  
Keyword(s):  
Copper Complex ◽  
Water Oxidation ◽  
Co2 Reduction ◽  
Bifunctional Electrocatalyst

scholarly journals Nano-sized manganese oxides as biomimetic catalysts for water oxidation in artificial photosynthesis: a review

2012 ◽  
Vol 9 (75) ◽  
pp. 2383-2395 ◽  
Author(s):  
Mohammad Mahdi Najafpour ◽  
Fahimeh Rahimi ◽  
Eva-Mari Aro ◽  
Choon-Hwan Lee ◽  
Suleyman I. Allakhverdiev
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Water Oxidation ◽  
Active Sites ◽  
Manganese Oxides ◽  
Metal Compounds ◽  
Functional Models ◽  
Current Densities ◽  
Conversion Efficiencies ◽  
Manganese Compounds

There has been a tremendous surge in research on the synthesis of various metal compounds aimed at simulating the water-oxidizing complex (WOC) of photosystem II (PSII). This is crucial because the water oxidation half reaction is overwhelmingly rate-limiting and needs high over-voltage (approx. 1 V), which results in low conversion efficiencies when working at current densities required for hydrogen production via water splitting. Particular attention has been given to the manganese compounds not only because manganese has been used by nature to oxidize water but also because manganese is cheap and environmentally friendly. The manganese–calcium cluster in PSII has a dimension of about approximately 0.5 nm. Thus, nano-sized manganese compounds might be good structural and functional models for the cluster. As in the nanometre-size of the synthetic models, most of the active sites are at the surface, these compounds could be more efficient catalysts than micrometre (or bigger) particles. In this paper, we focus on nano-sized manganese oxides as functional and structural models of the WOC of PSII for hydrogen production via water splitting and review nano-sized manganese oxides used in water oxidation by some research groups.

scholarly journals Aromaticity Driven Electrocatalytic Water Oxidation by a Phosphorus-Nitrogen PN3-Pincer Cobalt Complex

2019 ◽  
Author(s):  
Pradip K. Das ◽  
Sarmistha Bhunia ◽  
Priyanka Chakraborty ◽  
Atanu Rana ◽  
Abhishek Dey ◽  
...  
Keyword(s):  
Water Oxidation ◽  
High Efficiency ◽  
Cobalt Complex ◽  
Potential Jump ◽  
Onset Potential ◽  
New Strategy ◽  
Earth Abundant ◽  
High Valent ◽  
Lower Overpotential ◽  
Cobalt Species

Water oxidation is the primary step in both natural and artificial photosynthesis to convert solar energy in into chemical fuels. Herein, we report the first cobalt-based pincer catalyst for electrolytic water oxidation at neutral pH with high efficiency under electrochemical conditions. Most importantly, ligand (pseudo)aromaticity is identified to play an important role in the electrocatalysis. A significant potential jump (~300 mV) was achieved towards a lower positive value when the aromatized cobalt complex was transformed to a (pseudo)dearomatized cobalt species. This complex catalyzes the water oxidation in its high valent oxidation state at a much lower overpotential (~ 340 mV vs. NHE) based on the onset potential (0.5 mA/cm<sup>2</sup>) of catalysis at pH 10.5, outperforming all the other literature systems. These observations may provide a new strategy for the design of earth-abundant transition metal-based water oxidation catalysts.

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