Plasmonic Ag decorated CdMoO₄ as an efficient photocatalyst for solar hydrogen production

Abstract

Plasmonic enhancement of photocatalytic hydrogen generation is demonstrated using hierarchical Ag decorated CdMoO4 synthesized using a hydrothermal method.

Assessment of Lewis‐Acidic Surface Sites Using Tetrahydrofuran as a Suitable and Smart Probe Molecule

“…[ 20 , 21 ] On the other hand, the XRD pattern of CdO clearly displayed five very strong diffraction peaks at 2θ=33.07° (111), 38.34° (200), 55.30° (220), 65.96° (311) and 69.26° (222) which belong to face‐centred system (Monteponite CdO, JCPDS # 5‐0640) as shown in Figure 1 e.[ 22 , 23 ] Three distinct diffraction peaks can be observed in patterns b‐d of mixed MoO 3 ‐CdO samples at 2θ=29.25° (112), 31.99° (004) and 34.38° (200), which could be related to the formation of tetragonal phase CdMoO 4 in these mixtures (JCPDS # 07–0209). [ 24 , 25 , 26 ] The crystallite size of the obtained different phases in these samples, that is, α‐MoO 3 , CdO and CdMoO 4 , was calculated using the Scherrer equation. [22] For MoO 3 in all patterns a‐d, the full width at half maximum (FWHM) of the narrow Debye–Scherrer line at 2θ=27.30° was used to calculate the crystallite size of MoO 3 , revealing a size range of 65–80 nm.…”

“…[22,23] Three distinct diffraction peaks can be observed in patterns b-d of mixed MoO 3 -CdO samples at 2θ = 29.25°(112), 31.99°(004) and 34.38°( 200), which could be related to the formation of tetragonal phase CdMoO 4 in these mixtures (JCPDS # 07-0209). [24][25][26] The crystallite size of the obtained different phases in these samples, that is, α-MoO 3 , CdO and CdMoO 4 , was calculated using the Scherrer equation. [22] For MoO 3 in all patterns a-d, the full width at half maximum (FWHM) of the narrow Debye-Scherrer line at 2θ = 27.30°was used to calculate the crystallite size of MoO 3 , revealing a size range of 65-80 nm.…”

Efficient solar light-driven hydrogen generation using an Sn3O4 nanoflake/graphene nanoheterostructure

“…The basic photocatalytic mechanism was discussed in our previous study. 41 The surface of semiconducting materials, when exposed to visible light equal to or greater than the band gap energy, generates electrons in the conductance band (CB) and holes in the valence band (VB) by excitation from the VB to the CB. The holes from the VB oxidize methanol and produce radicals as well as protons (H + ).…”

Experimental and theoretical study on hydrogen production by using Ag nanoparticle‐decorated graphite/Ni cathode

“…Their study revealed the superior HER activity achieved using nanoscale silver particles over their macroscale counterparts 39 . Moreover, the HER at a silver nanoparticle‐decorated materials has also been the topic of many studies 40‐44 . Ni catalysts alone are not able to meet the desired activity, efficiency, and stability requirements for hydrogen production.…”

“…39 Moreover, the HER at a silver nanoparticle-decorated materials has also been the topic of many studies. [40][41][42][43][44] Ni catalysts alone are not able to meet the desired activity, efficiency, and stability requirements for hydrogen production. A combination of Ni and Ag metals has a synergistic effect enhancing the catalytic activity toward HER.…”