Photochemical Fate: The First Step Determines Efficiency of H2 Formation with a Supramolecular Photocatalyst

2010 ◽  
Vol 49 (23) ◽  
pp. 3981-3984 ◽  
Author(s):  
Stefanie Tschierlei ◽  
Michael Karnahl ◽  
Martin Presselt ◽  
Benjamin Dietzek ◽  
Julien Guthmuller ◽  
...  
Keyword(s):  
H2 Formation ◽  
Photochemical Fate

scholarly journals On the Mechanism of H2 Formation in the Interstellar Medium

1987 ◽  
Vol 120 ◽  
pp. 167-169
Author(s):  
Valerio Pirronello
Keyword(s):  
Interstellar Medium ◽  
Molecular Hydrogen ◽  
Formation Rate ◽  
Cosmic Ray ◽  
Interstellar Clouds ◽  
H2 Formation ◽  
Reduced Mobility

The problem of the formation of molecular hydrogen in interstellar clouds is revisited. the role played by cosmic ray bombardment under certain circumstances is considered mainly in the light of the low formation rate of H2 on grains due to the reduced mobility of adsorbed H atoms on their amorphous surfaces at interstellar temperatures.

Photochemical fate of pharmaceuticals in the environment: Naproxen, diclofenac, clofibric acid, and ibuprofen

2003 ◽  
Vol 65 (4) ◽  
pp. 342-351 ◽  
Author(s):  
Jennifer L. Packer ◽  
Jeffrey J. Werner ◽  
Douglas E. Latch ◽  
Kristopher McNeill ◽  
William A. Arnold
Keyword(s):  
Clofibric Acid ◽  
Pharmaceuticals In The Environment ◽  
Photochemical Fate

scholarly journals Conversion of HI Molecule to H2 Molecule

2015 ◽  
Vol 5 ◽  
pp. 82-86
Author(s):  
Arjun Kumar Gautam
Keyword(s):  
Historical Development ◽  
Molecular Hydrogen ◽  
Interstellar Dust ◽  
Formation Rate ◽  
Theoretical Models ◽  
Molecular Gas ◽  
Astronomical Data ◽  
Interstellar Dust Grains ◽  
H2 Formation ◽  
H2 Molecule

In this article I review the historical development and conversion of atomic to molecular hydrogen in astronomy. I discuss how the discoveries of HI and H2 in the interstellar medium were followed by studies of the relative abundance of atomic and molecular gas. Understanding this led to increasingly sophisticated theoretical models for H2 formation on the surface of interstellar dust grains. In certain situations, astronomical data can be used to constrain the formation rate of H2 molecules. Finally, I use the reasonably well-determined chemistry of HI and H2 to determine the overall timescale of star formation. The Himalayan Physics Vol. 5, No. 5, Nov. 2014 Page: 82-86

scholarly journals Catalytic Role of Refractory Interstellar Grain Analogs on H2 Formation

2021 ◽  
Vol 8 ◽  
Author(s):  
Tushar Suhasaria ◽  
Vito Mennella
Keyword(s):  
Molecular Hydrogen ◽  
Laboratory Experiments ◽  
Dust Grains ◽  
Interstellar Gas ◽  
Complex Molecules ◽  
Catalytic Role ◽  
H2 Formation ◽  
Dust Grain

Refractory dust grains have an important role to play in the chemistry of star and planet-forming regions. Their surfaces interact with interstellar gas and act as a catalyst for the formation of simple and complex molecules in space. Several mechanisms have been invoked to explain how molecular hydrogen is formed in reactions on dust grain surfaces in different regions of space. In this article, we give an overview of our understanding of the laboratory experiments, conducted over the last 20 years, that deal with H2 formation on interstellar grain analogs in space simulated conditions.

Hydrogen Abstraction/Addition Tunneling Reactions Elucidate the Interstellar H2NCHO/HNCO Ratio and H2 Formation

2019 ◽  
Vol 141 (29) ◽  
pp. 11614-11620 ◽  
Author(s):  
Karolina A. Haupa ◽  
György Tarczay ◽  
Yuan-Pern Lee
Keyword(s):  
Hydrogen Abstraction ◽  
H2 Formation
Sign in / Sign up

Export Citation Format

Share Document