In situ addition of Ni salt onto a skeletal Cu7S4 integrated CdS nanorod photocatalyst for efficient production of H2 under solar light irradiation

2020 ◽  
Vol 10 (11) ◽  
pp. 3542-3551 ◽  
Author(s):  
P. Bhavani ◽  
D. Praveen Kumar ◽  
Hyung Seop Shim ◽  
Putta Rangappa ◽  
Madhusudana Gopannagari ◽  
...  
Keyword(s):  
Copper Sulfide ◽  
Low Cost ◽  
Semiconductor Nanostructures ◽  
Light Irradiation ◽  
Solar Light ◽  
Efficient Production ◽  
Solar Light Irradiation ◽  
Earth Abundant

Development of earth-abundant, low cost, skeletal-type copper sulfide superstructures and in situ addition of Ni salts plays a prominent role to enhance the activity of CdS semiconductor nanostructures for photocatalytic H2 production.

scholarly journals Aniline chlorination by in situ formed Ag–Cl complexes under simulated solar light irradiation

2015 ◽  
Vol 71 (11) ◽  
pp. 1679-1685 ◽  
Author(s):  
Xuefeng Hu ◽  
Xiaowen Wang ◽  
Liuliu Dong ◽  
Fei Chang ◽  
Yongming Luo
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Water ◽  
Resonance Absorption ◽  
Light Irradiation ◽  
Solar Light ◽  
Chloride Medium ◽  
Surface Plasmon Resonance Absorption ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

Ag speciation in a chloride medium was dependent upon the Cl/Ag ratio after releasing into surface water. In this study, the photoreaction of in situ formed Ag–Cl species and their effects on aniline photochlorination were systematically investigated. Our results suggested that formation of chloroaniline was strongly relevant to the Cl/Ag ratio and could be interpreted using the thermodynamically expected speciation of Ag in the presence of Cl−. AgCl was the main species responsible for the photochlorination of aniline. Both photoinduced hole and •OH drove the oxidation of Cl− to radical •Cl, which promoted the chlorination of aniline. Ag0 formation was observed from the surface plasmon resonance absorption during AgCl photoreaction. This study revealed that Ag+ released into Cl−-containing water may result in the formation of chlorinated intermediates of organic compounds under solar light irradiation.

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.

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