Surface-modified Ag@Ru-P25 for photocatalytic CO_(2) conversion with high selectivity over CH_(4) formation at the solid–gas interface  

作　　者：Chaitanya B.Hiragond Sohag Biswas Niket SPowar Junho Lee Eunhee Gong Hwapyong Kim Hong Soo Kim Jin-Woo Jung Chang-Hee Cho Bryan M.Wong Su-Il In 

机构地区：[1]Department of Energy Science&Engineering,Daegu Gyeongbuk Institute of Science and Technology(DGIST),Daegu,Republic of Korea [2]Department of Chemical&Environmental Engineering,Materials Science&Engineering Program,Department of Chemistry,Department of Physics&Astronomy,University of California-Riverside,Riverside,California,USA [3]Department of Physics and Chemistry,Daegu Gyeongbuk Institute of Science and Technology(DGIST),Daegu,Republic of Korea [4]NiceScience Corporation,Daegu,Republic of Korea

出　　处：《Carbon Energy》2024年第1期182-196,共15页碳能源（英文）

基　　金：supported by the Ministry of Science and ICT in Korea(2021R1A2C2009459);X-ray absorption spectra were obtained from Pohang Accelerator Laboratory(PAL)10C beamline;supported by the US Department of Energy,Office of Science,Office of Advanced Scientific Computing Research,and Scientific Discovery through Advanced Computing(SciDAC)program under Award Number DE-SC0022209.

摘　　要：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 CO_(2) reduction to solar fuels.A surface-modified Ag@Ru-P25 photocatalyst with H_(2)O_(2) treatment was designed in this study to convert CO_(2) and H_(2)O vapor into highly selective CH4.Ru doping followed by Ag nanoparticles(NPs)cocatalyst deposition on P25(TiO_(2))enhances visible light absorption and charge separation,whereas H_(2)O_(2) treatment modifies the surface of the photocatalyst with hydroxyl(–OH)groups and promotes CO_(2) 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,CO_(2) adsorption isotherm,and temperature programmed desorption study were performed to examine the significance of H_(2)O_(2) treatment in increasing CO_(2) reduction activity.The optimized Ag1.0@Ru1.0-P25 photocatalyst performed excellent CO_(2) reduction activity into CO,CH4,and C2H6 with a~95%selectivity of CH4,where the activity was~135 times higher than that of pristine TiO_(2)(P25).For the first time,this work explored the effect of H_(2)O_(2) treatment on the photocatalyst that dramatically increases CO_(2) reduction activity.

关 键 词：gas-phase CO_(2) reduction H_(2)O_(2) treatment plasmonic nanoparticles solar fuel photocatalyst surface modification 

分 类 号：O64[理学—物理化学]