Role of platinum-like tungsten carbide as cocatalyst of CdS photocatalyst for hydrogen production under visible light irradiation

CdS/Graphene Nanocomposite Photocatalysts

“…[ 15 ] However, the few active sites, high overpotential and slow reaction kinetics signifi cantly reduce the energy conversion effi ciency and photocatalytic activity of CdS. For example, various H 2 -evolution cocatalysts (e.g., Pt, [ 65 ] Ni, [ 66 ] NiS, [ 60,67 ] NiO, [ 61,68 ] Ni 2 P, [ 69 ] Ni(OH) 2 , [ 62 ] Co(OH) 2 , [ 70 ] Co 3 O 4 , [ 71 ] MoS 2 , [ 72 ] WC, [ 73 ] WS 2 , [ 74 ] graphene, [ 75 ] and CuS [ 76 ] ) and O 2 -evolution cocatalysts (e.g., RuO 2 , [ 77,78 ] PdS, [ 79 ] and Ag 2 S [ 80 ] ) have been widely used to enhance the photocatalytic H 2 -production activity of CdS. It is generally believed that the loading of cocatalysts could increase the surface reaction sites, and reduce the overpotential and activation energy of redox reactions.…”

Effect of H2/CO2 mixture gas treatment temperature on the activity of LaNiO3 catalyst for hydrogen production from formaldehyde aqueous solution under visible light

“…To effectively utilize the visible light that accounts for 43% of the solar spectrum [8], it is therefore necessary to develop a visible-light responsive photocatalyst, and substantial efforts have been made in recent years to explore such a material. The photocatalytic activity can be enhanced by loading metal oxide and/or metal on various semiconductors as cocatalyst [9][10][11]. For example, Wu et al [12] reported that NiO-Ni-InTaO 4 prepared by an innovative sol-gel method exhibited high photocatalytic activity for water splitting under visible-light irradiation.…”

MoP is a novel, noble-metal-free cocatalyst for enhanced photocatalytic hydrogen production from water under visible light

“…Usually, the optimal rate for photocatalytic H 2 production in a metal-semiconductor system can be achieved with a loading content of a cocatalyst less than 10.0 wt %. 13,42,53,54 The high content of the cocatalyst in our present system is probably because some MoP cocatalyst is not uniformly attached to CdS during the mechanical mixing process. The apparent quantum yields (AQYs) for H 2 evolution over 16.7 wt % MoP/CdS NRs photocatalyst were measured under a monochromatic light at 450 nm (±5 nm).…”