How does oh affect the dissoziation of h2s?
Best insight from top research papers
The presence of OH radicals affects the dissociation of H2S. OH radicals can enhance the reactivity of the OH+H2S reaction, leading to the formation of H2O and SH species . OH radicals can also cause H2S to bind more strongly to the surface, promoting its adsorption on TiO2 and γ-Al2O3 surfaces . Additionally, OH radicals can facilitate the decomposition of H2S, making it a spontaneous process . The adsorption energies and reaction energies of H2S on different surfaces are influenced by the coverage of OH species . The rate constant for the reaction between OH radicals and H2S can be affected by the presence of other gases, such as NOx, which can scavenge HS species . Overall, OH radicals play a significant role in the adsorption, dissociation, and reaction kinetics of H2S.
Answers from top 4 papers
More filters
| Papers (4) | Insight |
|---|---|
10 Citations | The paper investigates the effect of hydroxyl coverage on the dissociation of H2S. It shows that the bonding strengths of H2S on partially hydrated surfaces are weaker compared to the dehydrated surface, and the activation energy for dissociation varies with different levels of hydroxyl coverage. |
23 Citations | The paper states that the presence of OH has a favorable effect on the adsorption energy of H2S, increasing its value. It also suggests that when H2S dissociates in the presence of OH, one H-atom of H2S may join OH to form water. |
7 Citations | The provided paper does not directly address the effect of OH on the dissociation of H2S. |
3 Citations | The paper investigates the reaction OH+H2S→H2O+SH. It does not specifically mention the dissociation of H2S or the effect of OH on it. |
Related Questions
What effect does oh have on the adsorption of h2s?4 answersThe presence of OH enhances the adsorption of H2S on various surfaces. On a TiO2 (001) surface, the addition of OH causes H2S to bind strongly to the surface, leading to the formation of water. On graphene oxides (GO), the presence of another OH group activates the oxygen group, facilitating the adsorption and dissociation of H2S. Similarly, on Si-doped BeO nanotubes (BeONT), substituting an O atom with Si increases the adsorption energy of H2S and makes the BeONT more sensitive to H2S. Additionally, on SiO2, Al2O3, TiO2, and ZrO2 surfaces, H2S adsorption leads to the formation of OH groups, and the presence of OH enhances the acidity of the surface. Similarly, on MgO surfaces, weakly bound H2S activates OH groups, leading to enhanced acidity.
What effect does the dissociation of h2o have on the adsorption of h2s?5 answersThe dissociation of H2O has an effect on the adsorption of H2S. The adsorption and dissociation of H2O on metal surfaces were studied in several papers. The adsorption strength of H2O on Al surfaces follows the order ANPs > Al(110) > Al(111) > Al(100). On CuO surfaces, the presence of an oxygen vacancy defect increases the reactivity for H2O adsorption and reduces the reaction energy required for H2O dissociation. On TiC(001) surfaces, H2S is weakly bound, while SH and atomic S are strongly bound. The presence of a co-adsorbed H inhibits the further dissociation of SH, but the hydrogenation of SH is easy. On γ-Al2O3 surfaces, the adsorption energies and activation energies of H2S dissociation depend on the surface hydroxyl coverage. Therefore, the dissociation of H2O can affect the adsorption of H2S on different metal surfaces.
What is H2 bonding in adsortion?5 answersH2 bonding in adsorption refers to the interaction between hydrogen molecules (H2) and a solid surface. The adsorption of H2 on transition metal clusters has been studied using spectroscopy and computational calculations. It has been found that the adsorption of H2 on these clusters is dissociative, resulting in the presence of both atomic and molecularly chemisorbed hydrogen. The adsorption sites for H2 on metal clusters are different from those on extended surfaces, with hydrogen being able to be 2- or 3-fold coordinated to cationic metal clusters. Additionally, the activation of H2 on high valent centers can lead to heterolytic cleavage of the H-H bond, resulting in the formation of a dihydroborenium complex. These studies provide insights into the bonding and reactivity of H2 in adsorption processes.
Why is h2s toxic for humen?4 answersHydrogen sulfide (H2S) is toxic to humans due to its ability to inhibit cytochrome c oxidase, an enzyme involved in cellular respiration. H2S can also cause glutathione (GSH) depletion, which is an important antioxidant in cells. Additionally, H2S can directly inhibit the electron transport chain in mitochondria, leading to reductions in oxygen consumption and cellular ATP. The toxicity of H2S is similar to cyanide, as both compounds can cause respiratory distress, convulsions, hypotension, and cardiac irregularities. Currently, there are no FDA-approved drugs for the treatment of H2S poisoning, and the available treatment options are primarily supportive care. Further research is needed to develop effective antidotes and drugs to prevent and treat H2S poisoning, reduce mortality and morbidity, and prevent long-term sequelae from acute and chronic exposures.
Can sulfur form hydrogen bond with functional groups like hydroxyl group?5 answersSulfur can form hydrogen bonds with functional groups like hydroxyl groups. The hydrogen-bonding capabilities of sulfur-containing molecules have been explored in various studies. It has been found that sulfur atoms can form hydrogen bonds with other atoms, such as nitrogen and oxygen, with S···N distances of 3.3−3.5 A. Additionally, sulfur is weaker than oxygen but nearly equivalent as a hydrogen bond acceptor. The stability of OH radical adducts at sulfur atoms in organic sulfides is enhanced by the formation of internal hydrogen bonds. These findings suggest that sulfur can participate in hydrogen bonding interactions with functional groups like hydroxyl groups.
How does adhesion test evaluate mechanical performance of coating system when exposed to h2s?5 answersAdhesion tests evaluate the mechanical performance of a coating system when exposed to H2S by assessing the adhesion between the coating and the underlying substrate. Various mechanical methods have been developed for this evaluation. These methods include sandwich specimen-based and bimaterial specimen-based testing methods, which provide information on the principles, merits, limitations, typical applications, and recent improvements of each method. The evaluation of adhesion is critical for assessing the quality of a coating and its fitness for service in industries such as aerospace, biomedical, and electronics. However, it is important to note that there is currently no test that satisfies all requirements for properly representing the adhesion of a coating on its substrate. Therefore, it is necessary to compare several test methods to obtain representative values of interface toughness or interfacial fracture energy.