A novel noble-metal-free Mo2C-In2S3 heterojunction photocatalyst with efficient charge separation for enhanced photocatalytic H2 evolution under visible light

Enhanced visible-light photoreduction of CO2 to methanol over Mo2C/TiO2 surfaces in an optofluidic microreactor

“…It can be also seen that increases in Mo2C content led to an enhanced absorbance, which agrees well with previous reports. [24][25][26][27][28][29] Figure 4b…”

“…[14][15][16][17][18][19][20][21][22][23] As observed, the rate for CH3OH formation and reaction selectivity are higher when visible light illuminated the photoactive surfaces (r= 0.11 µmol•g -1 •h -1 and SCH3OH/HCOOH= 3.7) in comparison to the performance under UV light irradiation (r= 0.04 µmol•g -1 •h -1 and SCH3OH/HCOOH= 2), which can be related to the ability of Mo2C to enhance the photocatalytic activity with visible light. [24][25][26][27][28][29] Besides, the system is able to produce CH3OH, in contrast to previous results at CdS/Mo2C nanowires that tend to be very selective to the formation of hydrogen-deficient carbon products (98.3% for CO) from the photoreduction of CO2, 53 which might be linked to the presence of CdS. Conversely, a previous report shows that CH3OH can be produced at high concentrations (463.68 mg L −1 ) when applying MoS2 rods-TiO2 nanotubes heterojunction electrodes in the photo-assisted electrocatalytic reduction of CO2.…”

“…[14][15][16][17][18][19][20][21][22][23] Besides, Mo2C is able to enhance photocatalytic activity in different systems under visible light, boosting photo-generated charge carriers transportation. [24][25][26][27][28][29] Thus, the use of Mo2C/TiO2 composites may be a good approach to enhance the activity of TiO2 in the photocatalytic conversion of CO2 to CH3OH. In addition, the carbides are conductive, benefiting for the charge separation in photocatalysis and increasing also the lifetime of the photogenerated electron-hole pairs.…”

Transition‐Metal‐Based Cocatalysts for Photocatalytic Water Splitting

“…1.52 (420 nm) 10 (2019) [274] CdS Fe (2021) [276] CdS Mo 2 C Calcination UV cut off (Xe) Lactic acid 6810 (H 2 ) 39 (420 nm) 10 (2020) [39] In 2 S 3 Mo 2 C Hydrothermal λ ≥ 420 nm (Xe) Lactic acid 535.58 (H 2 ) -16 (2021) [277] g-C 3 N 4 Mo 2 C@C Physical mixing λ > 400 nm (Xe) TEOA 2269.47 (H 2 ) 9.07 (405 nm) 25 (2018) [278] ZnIn 2 S 4 MoC-QDs/C Hydrothermal λ ≥ 400 nm (Xe) Lactic acid 1131.9 (H 2 ) -12 (2018) [279] g-C 3 N 4 Fe 3 C@C Grinding Vis (Xe) TEOA 272 (H 2 ) 0.501 (400 nm) 20 (2019) [280] g-C 3 N 4 Mo-Mo 2 C Sonication λ > 420 nm (Xe) TEOA 219.7 (H 2 ) 8.3 (420 nm) 25 (2019) [281] g-…”

Plasma-Wind-Assisted In2S3 Preparation with an Amorphous Surface Structure for Enhanced Photocatalytic Hydrogen Production

“…It is noticed that the surface of the bare In 2 S 3 has been destroyed through the HRTEM imaging; comparatively, the structure of the P-In 2 S 3 is well maintained; Figure S10: The Raman spectra of the P-In 2 S 3 sample before and after catalytic reaction; Table S1: The comparison of hydrogen production rate, morphology, current density, and bandgap. References [ 24 , 25 , 43 , 44 , 45 , 46 , 47 , 48 ] are cited in the supplementary materials.…”