Titanium Nitride-Supported Platinum with Metal–Support Interaction for Boosting Photocatalytic H₂ Evolution of Indium Sulfide

Abstract

Metal-support interaction strongly influences the catalytic properties of metal-based catalysts.Here, titanium nitride (TiN) nanospheres are shown to be an outstanding support, for tuning the electronic property of platinum (Pt) nanoparticles and adjusting the morphology of indium sulfide (In 2 S 3 ) active components, forming flower-like core-shell nanostructures (TiN-Pt@In 2 S 3 ).The strong metal-support interaction between Pt and TiN through the formation of Pt-Ti bonds favours the migration of charge carrier and leads to the easy reducibility of TiN-Pt, thus improving the photocatalytic atom efficiency of Pt. The TiN-Pt@In 2 S 3 composite shows reduction of Pt loading by 70% compared to the optimal Pt-based system. Besides, the optimal TiN-Pt@In 2 S 3 composite exhibits H 2 evolution rate 4 times that of a Pt reference. This increase outperforms all other supports reported thus far.

Rich Indium‐Vacancies In2S3 with Atomic p–n Homojunction for Boosting Photocatalytic Multifunctional Properties

“…[ 12 ] However, rapid recombination of photoexcited carriers and profound photocorrosion limit their large‐scale applications in photocatalysis. Common strategies to tackle carriers recombination and photocorrosion are modifying noble metal cocatalysts, [ 13 ] establishing heterojunctions, [ 14 ] and adjusting crystal structure by ion doping. [ 15 ] Wang and co‐workers prepared heterostructure In 2 S 3 @ZIF‐8@ZnIn 2 S 4 for promoting the separation of photogenerated carriers, with a photoreduction rate of 97.8% toward Cr(VI).…”

Co4N–WNx composite for efficient piezocatalytic hydrogen evolution

“…The presence of Co 4 N results in a redistribution of charge and affects the core levels of WN x . 53,54 Based on the magnitude and direction of the peak shifts (0.4 eV) and previous literature, it can be reasonably inferred that a phase junction between Co 4 N and WN x has formed. This would a charge transfer from WN x to Co 4 N. 55–57 The above analysis suggests that the dual-phase CWN has been successfully synthesized.…”

“…53,54 Based on the magnitude and direction of the peak shifts (0.4 eV) and previous literature, it can be reasonably inferred that a phase junction between Co 4 N and WN x has formed. This would a charge transfer from WN x to Co 4 N. 55–57 The above analysis suggests that the dual-phase CWN has been successfully synthesized. Although only the WN x in CWN exhibits a non-centrosymmetric structure, the existence of a surface oxide layer and a phase junction between Co 4 N and WN x can also contribute to the piezoelectric property of CWN by creating phase boundaries, thereby improving the associated non-centrosymmetric structures.…”

“…S8a † show that the onset over-potential of CWN-750 is lower than that of either WN x or CoWO 4 . This indicates that the lower potential energy loss in the case of the CWN-750 electrode is caused by the active sites due to Co 4 N. 55,65 In addition, the electrochemical impedance spectroscopy (EIS) results (Fig. S8b †) suggest that CWN shows a better charge migration capability than WN x and CoWO 4 .…”

In situgrowth of 2D ZnIn2S4nanosheets on sulfur-doped porous Ti3C2TxMXene 3D multi-functional architectures for photocatalytic H2evolution

“…[1][2][3] In general, the solarto-H 2 conversion efficiency depends on the balance of thermodynamics and kinetics, 4 which can be summarized into three main processes, including (i) semiconductor absorption of photons to generate electrons and holes, (ii) the photogenerated charge carriers separate and transport to the surface of catalysts, and (iii) the photo-generated electrons participate in the surface reduction reactions. 5,6 At present, various novel twodimensional (2D) photocatalysts with efficient charge separation and migration characters, such as BP 7 transition metal-based sulfides, [8][9][10] nitrides, 11,12 carbides, 13,14 and phosphides, 15,16 which tremendously accelerates the development of photocatalytic water splitting areas. However, the one component catalysts lead to the low conversion efficiency of photocatalytic H 2 evolution due to rapid charge recombination, sluggish charge kinetics, and limited surface-active sites.…”