TY - JOUR
T1 - Surface-modified Ag@Ru-P25 for photocatalytic CO2 conversion with high selectivity over CH4 formation at the solid–gas interface
AU - Hiragond, Chaitanya B.
AU - Biswas, Sohag
AU - Powar, Niket S.
AU - Lee, Junho
AU - Gong, Eunhee
AU - Kim, Hwapyong
AU - Kim, Hong Soo
AU - Jung, Jin Woo
AU - Cho, Chang Hee
AU - Wong, Bryan M.
AU - In, Su Il
N1 - Publisher Copyright:
© 2023 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd.
PY - 2024/1
Y1 - 2024/1
N2 - Systematic optimization of the photocatalyst and investigation of the role of each component is important to maximizing catalytic activity and comprehending the photocatalytic conversion of CO2 reduction to solar fuels. A surface-modified Ag@Ru-P25 photocatalyst with H2O2 treatment was designed in this study to convert CO2 and H2O vapor into highly selective CH4. Ru doping followed by Ag nanoparticles (NPs) cocatalyst deposition on P25 (TiO2) enhances visible light absorption and charge separation, whereas H2O2 treatment modifies the surface of the photocatalyst with hydroxyl (–OH) groups and promotes CO2 adsorption. High-resonance transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption near-edge structure, and extended X-ray absorption fine structure techniques were used to analyze the surface and chemical composition of the photocatalyst, while thermogravimetric analysis, CO2 adsorption isotherm, and temperature programmed desorption study were performed to examine the significance of H2O2 treatment in increasing CO2 reduction activity. The optimized [email protected] photocatalyst performed excellent CO2 reduction activity into CO, CH4, and C2H6 with a ~95% selectivity of CH4, where the activity was ~135 times higher than that of pristine TiO2 (P25). For the first time, this work explored the effect of H2O2 treatment on the photocatalyst that dramatically increases CO2 reduction activity.
AB - Systematic optimization of the photocatalyst and investigation of the role of each component is important to maximizing catalytic activity and comprehending the photocatalytic conversion of CO2 reduction to solar fuels. A surface-modified Ag@Ru-P25 photocatalyst with H2O2 treatment was designed in this study to convert CO2 and H2O vapor into highly selective CH4. Ru doping followed by Ag nanoparticles (NPs) cocatalyst deposition on P25 (TiO2) enhances visible light absorption and charge separation, whereas H2O2 treatment modifies the surface of the photocatalyst with hydroxyl (–OH) groups and promotes CO2 adsorption. High-resonance transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption near-edge structure, and extended X-ray absorption fine structure techniques were used to analyze the surface and chemical composition of the photocatalyst, while thermogravimetric analysis, CO2 adsorption isotherm, and temperature programmed desorption study were performed to examine the significance of H2O2 treatment in increasing CO2 reduction activity. The optimized [email protected] photocatalyst performed excellent CO2 reduction activity into CO, CH4, and C2H6 with a ~95% selectivity of CH4, where the activity was ~135 times higher than that of pristine TiO2 (P25). For the first time, this work explored the effect of H2O2 treatment on the photocatalyst that dramatically increases CO2 reduction activity.
KW - HO treatment
KW - gas-phase CO reduction
KW - plasmonic nanoparticles
KW - solar fuel photocatalyst
KW - surface modification
UR - http://www.scopus.com/inward/record.url?scp=85165100563&partnerID=8YFLogxK
U2 - 10.1002/cey2.386
DO - 10.1002/cey2.386
M3 - Article
AN - SCOPUS:85165100563
SN - 2637-9368
VL - 6
JO - Carbon Energy
JF - Carbon Energy
IS - 1
M1 - e386
ER -