Ti-Mesh supported porous CoS2 nanosheet self-interconnected networks with high oxidation states for efficient hydrogen production via urea electrolysis

Nanoscale ◽  
2020 ◽  
Vol 12 (21) ◽  
pp. 11573-11581
Author(s):  
Yu Jiang ◽  
Shanshan Gao ◽  
Jinling Liu ◽  
Gongchen Xu ◽  
Qiang Jia ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Oxidation States ◽  
Urea Electrolysis ◽  
High Oxidation ◽  
Interconnected Networks ◽  
Urea Decomposition ◽  
Ti Mesh

Porous CoS2 nanosheet networks with high oxidation states are successfully fabricated on a Ti-mesh and could be applied to urea decomposition.

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.

One-step electrodeposited NiFeMo hybrid film for efficient hydrogen production via urea electrolysis and water splitting

2021 ◽  
Vol 552 ◽  
pp. 149514
Author(s):  
Zunhang Lv ◽  
Zihan Li ◽  
Xiao Tan ◽  
Zhengmin Li ◽  
Rui Wang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Hybrid Film ◽  
Urea Electrolysis ◽  
One Step

Porphyry Cu-Au±Mo mineralization hosted by potassic igneous rocks: implications from the giant Peschanka porphyry deposit, Baimka Trend (North East Siberia, Russia)

2021 ◽  
pp. SP513-2020-178
Author(s):  
Andrey F. Chitalin ◽  
Ivan A. Baksheev ◽  
Yurii N. Nikolaev ◽  
Georgy T. Djedjeya ◽  
Yuliya N. Khabibullina ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Igneous Rocks ◽  
Oxidation States ◽  
Island Arcs ◽  
Porphyry Cu ◽  
North East ◽  
Average Grade ◽  
High K ◽  
High Oxidation ◽  
Other World

AbstractPorphyry Cu-Au±Mo mineralization at Peschanka is hosted by monzodiorite and monzonite intrusions with high-K calc-alkaline to shoshonitic compositions and dated at about 144.1±1.5 Ma, using U/Pb zircon ages. The Cretaceous intrusions are emplaced in a melange of Cretaceous island arcs, a tectonic setting comparable to other world-class porphyry Cu-Au deposits, such as Oyu Tolgoi, Mongolia, and Pebble, Alaska.Abundant primary magnetite contents of the Peschanka intrusions, as well as numerous gypsum and anhydrite veins, reflect the high oxidation states of their parental magmas. This mineralogical interpretation is confirmed by high whole-rock Fe2O3/FeO ratios and high V/Sc ratios of the rocks of up to 1.27 and up to 21.9, respectively. The whole-rock Eu/Eu& ratios of the Peschanka intrusions are ≥1 which is also typical for potassic igneous rocks with high oxidation states. Abundant amphibole and biotite phenocrysts of the intrusions as well as their high whole-rock Sr/Y ratios of up to 225 document significantly high H2O contents of the high-K magmas.Peschanka contains a resource of >9.5 Mt of copper at an average grade of 0.43 wt% and 16.5 Moz of gold at a high average grade of 0.23 g/t and, thus, representing one of the largest undeveloped greenfield copper projects worldwide. The vicinity of Peschanka still offers significant brownfields exploration potential.The hypogene vein-related and disseminated Cu-Au±Mo sulfide mineralization at Peschanka is structurally-controlled by significant NE-trending strike-slips that acted as the conduits for the hydrothermal fluids. The central part of the orebody consists of high-grade N-S trending sheeted quartz-bornite veining with unusually high vein densities. The highest Cu and Au grades are directly correlated with high vein densities.Peschanka is defined by distinct hydrothermal alteration zones including potassic, phyllic, propylitic and argillic assemblages, but a distinct lack of advanced argillic alteration. The mineralization itself is also zoned ranging from a central Mo-Cpy-Bn sulfide assemblage to a peripheral Py-Mt-dominated zone (“pyrite-shell”). Late-stage polymetallic assemblages overprint and surround the main stockwork zone.

Recent progress with electrocatalysts for urea electrolysis in alkaline media for energy-saving hydrogen production

2020 ◽  
Vol 10 (6) ◽  
pp. 1567-1581 ◽  
Author(s):  
Xiujuan Sun ◽  
Rui Ding
Keyword(s):  
Hydrogen Production ◽  
Energy Saving ◽  
Recent Progress ◽  
Cell Voltage ◽  
Alkaline Media ◽  
Wastewater Remediation ◽  
Urea Electrolysis

Urea electrolysis is a promising energy-saving avenue for hydrogen production owing to the low cell voltage, wastewater remediation and abundant electrocatalysts.

The Important Role of High Oxidation States in Cuprate Superconductors

1989 ◽  
pp. 165-168
Author(s):  
S. X. Dou ◽  
H. K. Liu ◽  
J. P. Zhou ◽  
A. J. Bourdillon ◽  
C. C. Sorrell
Keyword(s):  
Cuprate Superconductors ◽  
Oxidation States ◽  
High Oxidation
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