Coupling photocatalytic overall water splitting with hydrogenation of organic molecules: a strategy for using water as a hydrogen source and an electron donor to enable hydrogenation

Abstract

It is fascinating to use water as a hydrogen source to enable hydrogenation of organic molecules in green chemistry. Nevertheless, current light-driven strategies suffer from an expense of reductants for...

Photocatalytic Transfer Hydrogenation Reactions Using Water as the Proton Source

“…As a result, the majority of studies on the PWDTH have relied on noble-metal-loaded catalysts (e.g., Pd NP -CN, Pt NP -CN, Pd NP / TiO 2 , and Cu 2 O/Pd NP ). 15,26,34,43,49 SACs have the potential to greatly contribute to the rational design of targeted catalysts for preferred catalytic performance by acting as the perfect platforms to investigate catalytic mechanisms at the molecular or atomic level and to comprehend the relationship between structure and catalytic performance, 50−52 as confirmed in our previous work. 14 Meanwhile, non-noble-metal catalysts should be intelligently constructed to achieve efficient PWDTH in order to reduce excessive dependence on noble-metal catalysts.…”

“…Loading of a cocatalyst has attracted a great deal of attention due to its significant advantages in terms of enhanced light absorption, photogenerated charge migration, and surface catalytic reactions (e.g., hydrogenation, oxidation, and coupling). , The photocatalytic water splitting activity of non-noble-metal-loaded catalysts, however, is currently far from being on par with noble-metal-loaded catalysts. As a result, the majority of studies on the PWDTH have relied on noble-metal-loaded catalysts (e.g., Pd NP -CN, Pt NP -CN, Pd NP /TiO 2 , and Cu 2 O/Pd NP ). ,,,, SACs have the potential to greatly contribute to the rational design of targeted catalysts for preferred catalytic performance by acting as the perfect platforms to investigate catalytic mechanisms at the molecular or atomic level and to comprehend the relationship between structure and catalytic performance, − as confirmed in our previous work . Meanwhile, non-noble-metal catalysts should be intelligently constructed to achieve efficient PWDTH in order to reduce excessive dependence on noble-metal catalysts.…”

“…To investigate the mechanism of hydrogenation of aryl bromides, Ren et al conducted some controlled experiments, in which the radical inhibitors 2,6-di- tert -butyl-4-methylphenol (BHT) and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) were added to the reaction system . The results showed that the presence of BHT or TEMPO resulted in a dramatic decrease in the content of the product aryl compounds.…”

Basic comprehension and recent trends in photoelectrocatalytic systems

“…(iii) Wide variety of applications: 26,27 PEC could cover all applications of PC like water splitting [28][29][30][31][32][33][34][35][36][37][38][39][40] and artificial photosynthesis 41 and could combine multiple oxidation half-reactions such as organic pollutant removal, 42,43 water oxidation, 44,45 or biomass valorization 46,47 as well as reduction half-reactions like hydrogen generation, [48][49][50][51][52] CO 2 reduction [53][54][55] or N 2 fixation. [56][57][58] Although lots of surveys of PEC have been reviewed, most of them are focused on a selected application, [28][29][30]33,35,36,38,41,52,59 on the physicochemical modification of photoelectrodes, 24,26,[60][61]…”

Calcium carbide residue – a promising hidden source of hydrogen

“…Therefore, the search for alternative methods of hydrogen production is currently a hot topic. [10][11][12][13][14][15][16][17] Water splitting is a "green" opportunity to produce hydrogen [18][19][20] using electrochemical, [21][22][23][24] photochemical [25][26][27][28][29] and plasmolysis 10,30 methods (Fig. 1B).…”