Stabilizing and Improving Solar H₂ Generation from Zn_0.5Cd_0.5S Nanorods@MoS₂/RGO Hybrids via Dual Charge Transfer Pathway

Abstract

The incorporated Zn(0.5)Cd(0.5)S (ZCS) nanorods with MoS2/RGO cocatalysts by a simultaneous reduction reaction was reported. The preparation of RGO and formation of MoS2 with intimate interfacial contact with ZCS were achieved. Through the optimizing of each component proportion, the ZCS@MoS2/RGO hybrid with 1.5 wt % MoS2 and 3 wt % RGO showed the highest photocatalytic H2 production activity (2.31 mmol/h) with long time stability (50 h). The relative mechanism has been investigated. It is believed that the stabilizing and improving solar H2 generation is originating from dual charge transfer pathway from excited ZCS to RGO, then to MoS2 due to intimate interfacial structure.

A Zn0.5Cd0.5S Photocatalyst Modified by 2D Black Phosphorus for Efficient Hydrogen Evolution from Water

“…The as‐prepared 3 % MoS 2 /Zn 0.2 Cd 0.8 S hybrid catalyst presented relatively faster hydrogen production rate under visible‐light illumination . More recently, Xu's group shows that Zn 0.5 Cd 0.5 S nanorods co‐loaded with 1.5 wt% MoS 2 and 3 wt% RGO dual cocatalysts exhibited significantly improved catalytic activity for H 2 evolution with good stability . Based on these findings, we can conclude that two dimensional (2D) cocatalysts, such as graphene and TMDCs, are efficient in promoting the catalytic activity of Zn 0.5 Cd 0.5 S. However, graphene with zero band gap is unfavorable for optoelectronic applications .…”

“…In recent years, coupling with other semiconducting materials to form heterojunction has been proved to be able to facilitate the separation of photogenerated electrons and holes, and thus to promote the catalytic activity dramatically . Various hybrid catalysts have been developed based on this strategy . Among these hybrid catalysts, the ones composed of Zn x Cd 1–x S solid solution and two dimensional materials, such as transition metal dichalcogenides (TMDCs) or graphene, were especially interesting because of their significant improved catalytic activities ,.…”

An Efficient, Visible‐Light‐Driven, Hydrogen Evolution Catalyst NiS/ZnxCd1−xS Nanocrystal Derived from a Metal–Organic Framework

“…According to X‐ray photoelectron spectra (XPS, Figure S16) of NiS/Zn 0.5 Cd 0.5 S, the peaks of Zn 2p 3/2 (1023.9 eV), Zn 2p 1/2 (1046.9 eV), Cd 3d 5/2 (404.8 eV) and Cd 3d 3/2 (411.6 eV) are all sharp and symmetrical, demonstrating that the valences of Zn and Cd are both +2 . A weak peak is present at 857.2 eV due to the small amount of Ni in NiS/Zn 0.5 Cd 0.5 S. Two peaks at 161.2 eV and 162.4 eV divided from S 2p peak can be attributed to the S 2p 3/2 and S 2p 1/2 levels, respectively .…”

Efficient Photocatalytic Hydrogen Generation from Water over CdS Nanoparticles Confined Within an Alumina Matrix

“…[7][8][9][10][11] Many oxide-, oxynitride-, sulfide-, and oxysulfidebased photocatalystsh ave been developed to produce hydrogen from water under visible-light irradiation over the past few decades. [12][13][14][15][16] Among the various kinds of photocatalysts, sulfide-based photocatalysts are recognizeda so ne of the most attractive candidates because of their high photocatalytic efficiency. [17,18] CdS displays ab and gap of 2.4 eV ande xhibits an efficient photocatalytic H 2 evolution rate under visible-light irradiation.…”