Pt–Ni_xalloy nanoparticles: a new strategy for cocatalyst design on a CdS surface for photo-catalytic hydrogen generation

Abstract

In this report, PtNix alloy NPs coupled with a CdS photocatalyst for photocatalytic hydrogen generation under visible light have been explored.

Modulating Catalytic Activity and Durability of PtFe Alloy Catalysts for Oxygen Reduction Reaction Through Controlled Carbon Shell Formation

“…To investigate the crystal structure of heat-treated PtFe catalysts, their XRD patterns were recorded and compared with commercial Pt/C as shown in Figure 2. The commercial Pt/C catalyst showed Bragg angles (2 θ ) at 39.8, 46.3, and 67.5° corresponding to (111), (200), and (220) planes (JCPDS# 87-0646) of the fcc structure of Pt (Figure 2a) [40]. On the other hand, in case of PtFe catalysts, the XRD peak positions were slightly shifted to 40.7, 47.4, and 69.7° compared to the fcc structure of Pt, in accordance with previous literature reports (JCPDS# 65–1051).…”

Charge-Transfer Modulation on CdS Artificial Leaf for Efficient Hydrogen Generation

“…12,13 CdS, a conventional and significant IIA−VIA group of cadmium and sulfide elements with a 2.42 eV (wavelength 512 nm) band gap, has been extensively explored because it displays outstanding electron charge-transport abilities, higher electron (ionic) mobility (which is derived from the ratio of drift velocity and potential gradients) of 350 cm 2 V −1 s −1 , and suitable band edge positions. 14,15 Fortunately, CdS continues to have significant limitations as it remains unstable during the reaction and is susceptible to photocorrosion, as well as has low reusability. 16 The main cause for this is the building up of holes produced by photons in the valence band (VB) of CdS, which causes the swift oxidation of S 2− on the CdS exterior to produce sulfur.…”

The roles and mechanism of cocatalysts in photocatalytic water splitting to produce hydrogen

“…In the past two decades, the semiconductor photocatalysts have been greatly developed by a large number of scholars from various countries and regions. Many photocatalytic materials have been investigated, including metal oxides or sulfides, such as TiO2 [19][20][21][22][23][24][25][26][27][28], CdS [29][30][31][32][33][34][35][36][37][38] and ZnCdS [15,[39][40][41][42], and the metal-free semiconductors such as rGO [43] and g-C3N4 [5,[44][45][46][47][48][49][50][51][52][53][54]. However, the photocatalytic activities of the most promising semiconductor photocatalysts are still not quite satisfied due to the easy recombination between charge carriers.…”