Interface-directed assembly of a simple precursor of [FeFe]–H2ase mimics on CdSe QDs for photosynthetic hydrogen evolution in water

Cobalt phosphide as a highly active non-precious metal cocatalyst for photocatalytic hydrogen production under visible light irradiation

“…The valence band potential (E VB ) of the CdS NRs can be calculated by the following equations: [36][37] E g = 1240 / λ peak (1) E CB = X -E e -0.5 E g (2) E VB = E CB + E g (3) E g and E CB are the band gap and CB potentials, respectively. The valence band potential (E VB ) of the CdS NRs can be calculated by the following equations: [36][37] E g = 1240 / λ peak (1) E CB = X -E e -0.5 E g (2) E VB = E CB + E g (3) E g and E CB are the band gap and CB potentials, respectively.…”

Hydrogen evolution catalyzed by viable and non-viable cells on biocathodes

“…Simple "hydrogenase mimics" consisting of a metallic catalytic center surrounded by stabilizing ligands [43,44] have been synthetically created, suggesting that only basic requirements must be met to form a catalytically active, hydrogen producing protein-like structure able to accept electrons supplied from an electrode. The peptide sequences i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 9 ( 2 0 1 4 ) 1 6 8 4 1 e1 6 8 5 1 identified on the electrode surfaces were derived from proteins that have such requisite catalytic centers, such as FeS [45], and supporting ligands required for hydrogen production similar to these simple synthetic proteins.…”

Efficient and Limiting Reactions in Aqueous Light-Induced Hydrogen Evolution Systems using Molecular Catalysts and Quantum Dots

“…This TOF Co,max value is one of the highest reported using quantum dots as photosensitizers and a molecular catalyst in water that has not been generated in situ, together with two recent reports that use CdSe QDs and diiron or nickel catalysts. 9,10 Other related systems with high catalytic activity are active only in organic solvents 19 or they use inorganic salts as precursors of the catalyst. 3,8 Blank experiments were performed in the absence of catalyst Co(III)-1 and in the dark and we did not observe the formation of significant amount of hydrogen.…”

“…Further examples of molecular approaches using quantum dots as photosensitizers in pure water involve the use of hydrogenases and their functional mimics. 2,9,[15][16][17][18] Yet, although the catalytic activity of some of these examples is remarkably high (up to hundreds of thousands of turnover numbers), the reported quantum yields are still below 40 % even when using monochromatic light. In this context, a deeper knowledge of the kinetics of both charge transfer and bond formation-breaking are the keys to understand the limitations of photo-driven hydrogen evolving systems based on molecular approaches.…”