In situ ellipsometry on noble metal electrodes, a way of testing theoretical microscopic parameters

1991 ◽  
Vol 36 (11-12) ◽  
pp. 1839-1847 ◽  
Author(s):  
F. Chao ◽  
M. Costa ◽  
J. Lecoeur
Keyword(s):  
Noble Metal ◽  
Metal Electrodes

Comparative study of the adsorption of SO42-/HSO4- and Cl− anions on smooth and rough surfaces of noble metal electrodes by in situ radiotracer thin gap method

2014 ◽  
Vol 712 ◽  
pp. 151-160 ◽  
Author(s):  
Kata Berkesi ◽  
Dávid Horváth ◽  
Zoltán Németh ◽  
Kálmán Varga ◽  
László Péter ◽  
...  
Keyword(s):  
Comparative Study ◽  
Noble Metal ◽  
Rough Surfaces ◽  
Metal Electrodes

In situ radiotracer and voltammetric study of Zn electrosorption on noble metal electrodes

2000 ◽  
Vol 485 (2) ◽  
pp. 121-127 ◽  
Author(s):  
Kálmán Varga ◽  
Imre Szalóki ◽  
Andrea Somogyi ◽  
Pál Baradlai ◽  
Akiko Aramata ◽  
...  
Keyword(s):  
Noble Metal ◽  
Metal Electrodes ◽  
Voltammetric Study

scholarly journals Converting copper sulfide to copper with surface sulfur for electrocatalytic alkyne semi-hydrogenation with water

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yongmeng Wu ◽  
Cuibo Liu ◽  
Changhong Wang ◽  
Yifu Yu ◽  
Yanmei Shi ◽  
...  
Keyword(s):  
Binding Energy ◽  
Noble Metal ◽  
Atomic Hydrogen ◽  
Copper Sulfide ◽  
Low Cost ◽  
Water Electrolysis ◽  
Metal Free ◽  
Copper Nanowire

AbstractElectrocatalytic alkyne semi-hydrogenation to alkenes with water as the hydrogen source using a low-cost noble-metal-free catalyst is highly desirable but challenging because of their over-hydrogenation to undesired alkanes. Here, we propose that an ideal catalyst should have the appropriate binding energy with active atomic hydrogen (H*) from water electrolysis and a weaker adsorption with an alkene, thus promoting alkyne semi-hydrogenation and avoiding over-hydrogenation. So, surface sulfur-doped and -adsorbed low-coordinated copper nanowire sponges are designedly synthesized via in situ electroreduction of copper sulfide and enable electrocatalytic alkyne semi-hydrogenation with over 99% selectivity using water as the hydrogen source, outperforming a copper counterpart without surface sulfur. Sulfur anion-hydrated cation (S2−-K+(H2O)n) networks between the surface adsorbed S2− and K+ in the KOH electrolyte boost the production of active H* from water electrolysis. And the trace doping of sulfur weakens the alkene adsorption, avoiding over-hydrogenation. Our catalyst also shows wide substrate scopes, up to 99% alkenes selectivity, good reducible groups compatibility, and easily synthesized deuterated alkenes, highlighting the promising potential of this method.

Sign in / Sign up

Export Citation Format

Share Document