Engineering nanostructured spinel ferrites by co-substitution for total water electrolysis by preferential exposure of metal cations on the surface

2020 ◽  
Vol 4 (8) ◽  
pp. 3915-3925
Author(s):  
Archana V. N. ◽  
Pankaj Kumar Rastogi ◽  
Thoufeeq S. ◽  
Vinayasree S. ◽  
S. Shaji ◽  
...  
Keyword(s):  
Metal Cations ◽  
Water Electrolysis ◽  
Spinel Ferrites ◽  
Total Water ◽  
Co Substitution ◽  
Octahedral Sites ◽  
Nanosized Magnetite ◽  
Cobalt And Nickel

Single phasic nanosized magnetite co-substituted with cobalt and nickel having exposed octahedral sites is shown for its effectiveness in total water electrolysis at low onset potentials.

Enhancement of HER kinetics with RhNiFe for high-rate water electrolysis

2020 ◽  
Vol 10 (11) ◽  
pp. 3681-3693 ◽  
Author(s):  
Kannimuthu Karthick ◽  
Abdul Bashith Mansoor Basha ◽  
Abinaya Sivakumaran ◽  
Subrata Kundu
Keyword(s):  
Water Splitting ◽  
Water Electrolysis ◽  
High Rate ◽  
Total Water ◽  
Low Overpotential

The NiFeCHH is best for OER and poor for HER which by introducing Rh, showed total water splitting in KOH. It requires an ultra-low overpotential of just 36 mV at 50 mA cm−2 for HERs and 286 mV at 50 mA cm−2 for TWS.

Current Progressions in Transition Metal based Hydroxides as Bi-functional Catalysts towards Electrocatalytic Total Water Splitting

2021 ◽  
Author(s):  
K. Sangeetha ◽  
Karthick Kannimuthu ◽  
S. Sam Sankar ◽  
Arun Karmakar ◽  
Ragunath Madhu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Fossil Fuels ◽  
Sustainable Energy ◽  
Water Electrolysis ◽  
Total Water ◽  
Energy Demands

To meet the ever-increasing energy demands with only source of fossil fuels will no longer be sufficient for sustainable energy developments. Thus, the choice of water electrolysis is the finest...

Stability of hectorite in weakly acidic solutions. III. Adsorption of heavy metal cations and hectorite solubility

Clay Minerals ◽  
1968 ◽  
Vol 7 (4) ◽  
pp. 409-419 ◽  
Author(s):  
Kevin G. Tiller
Keyword(s):  
Heavy Metal ◽  
Calcium Chloride ◽  
Silicic Acid ◽  
Metal Cations ◽  
Magnesium Ions ◽  
Octahedral Layer ◽  
Acidic Solutions ◽  
Heavy Metal Cations ◽  
Ph Dependent ◽  
Cobalt And Nickel

AbstractThe heavy metal cations studied were adsorbed by hectorite suspended in 0.05 M calcium chloride as a pH-dependent reaction in the order, Cu > Zn > (Co, Mn) > Ni. The adsorption of heavy metal cations was accompanied by the removal from solution of silicic acid released by clay dissolution. It is proposed that the reaction takes place on edge surfaces such that the clay lattice is effectively extended. This result complements other work in which it has been shown that the adsorption of silicic acid by other silicate clays results in an increased adsorption of zinc, cobalt and nickel. The present study did not provide evidence of the exchange of zinc and other cations for lattice magnesium.The solubility of hectorite was decreased in the presence of heavy metal cations in the same order that favoured their adsorption. It is proposed that they limit the dissolution of hectorite in weakly acidic solutions by adsorption on or near the sites most prone to proton attack, that is, the magnesium ions of the octahedral layer exposed at edges and defects.

Adsorption of metal cations on wool carbonising waste. Part 1. Adsorption isotherms

1981 ◽  
Vol 31 (1) ◽  
pp. 597-601 ◽  
Author(s):  
Karim Farag ◽  
Francis Perineau ◽  
Antoine Gaset ◽  
Jacques Molinier
Keyword(s):  
Adsorption Isotherms ◽  
Metal Cations
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