Vanadium tetrasulfide as an earth-abundant and noble-metal-free cocatalyst for a solar-to-hydrogen conversion reaction

Abstract

Designing non-precious metal cocatalysts with a high surface area that facilitate interfacial charge separation is a significant challenge in solar-to-hydrogen energy conversion reactions. Herein, we report a heterostructured photocatalytic system...

Tuning of TiO2/CdS Hybrid Semiconductor with Au Cocatalysts: State-of-the-Art Design for Sunlight-Driven H2 Generation from Water Splitting

“…Similarly, peaks observed at 161.01 and 162.49 eV binding energies correspond to sulfur 2p 3/2 and 2p 1/2 , respectively. On comparison of results, it was found that TiO 2 /CdS had slightly positive shifts for Cd 3d and S 2p as compared to pure CdS . Note: When CdS and TiO 2 are mixed, these changes are governed due to the reduction in the electron density over the surfaces .…”

“…On comparison of results, it was found that TiO 2 /CdS had slightly positive shifts for Cd 3d and S as compared to pure CdS. 70 Note: When CdS and TiO 2 are mixed, these changes are governed due to the reduction in the electron density over the surfaces. 71 Moreover, in the XPS spectrum, two peaks of Ti appeared at 457.3 and 463.9 eV that corresponds to the binding energies of Ti 2p 3/2 and 2p 1/2 , respectively.…”

Self-induced electron attraction center formation with pyrophosphorylation strategy for photocatalytic hydrogen evolution

“…It is important to note that the intensity of the PL peak reflects the catalyst's ability to undergo radiative decay, returning from the excited state to the ground state, after absorbing photons. 37 The PCTO7 hybrid catalyst demonstrates a lower PL intensity than pure EY and CoTiO 3 , indicating its superior ability for electron–hole separation. This suggests that the phosphorization strategy has successfully optimized the transfer pathway for photoexcited electrons within CoTiO 3 .…”

Nickel-Based Bifunctional Cocatalyst to Enhance CdS Photocatalytic Hydrogen Production

“…Research has shown that semiconductors with narrow band gaps are more efficient in absorbing and utilizing light. , CdS, a visible-light-responsive photocatalyst, has become increasingly popular due to its narrow band gap, appropriate band positions, and simple preparation methods. However, the use of pure CdS is restricted by its high electron–hole recombination rate and photocorrosion, which significantly diminish its photocatalytic activity. − In order to improve the efficiency of CdS, researchers have explored various methods to increase the light absorption range, mitigate the recombination of photogenerated carriers, and ensure the catalysts’ durability over time. , The specific methods include introduction of cocatalysts, , construction heterostructures/composite, , regulation of crystal structures, − and so on.…”