PtCu合金沉积TiO2光催化选择性还原CO2的研究  

Photocatalytic Selective Reduction of CO2 over PtCu Alloy Deposited TiO2 Nanocrystals

作　　者：李由姿 熊卓[1] 赵永椿[1] 张军营[1] Li Youzi;Xiong Zhuo;Zhao Yongchun;Zhang Junying(State Key Laboratory of Coal Combustion,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;China-EU Institute for Clean and Renewable Energy,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学能源与动力工程学院煤燃烧国家重点实验室,武汉430074 [2]华中科技大学中欧清洁与可再生能源学院,武汉430074

出　　处：《燃烧科学与技术》2020年第6期529-534,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(U1610110,51706082).

摘　　要：CO2光催化还原技术是一项极具前景的可再生能源技术.本文利用化学还原法合成了不同Pt/Cu比例沉积的TiO2光催化剂,通过各项表征技术对其理化特性进行了分析,并评价了其光催化还原CO2特性.结果表明PtCu合金的沉积显著提高了光催化反应活性并使甲烷产物的选择性达到100%.另外通过傅里叶变换原位红外光谱分析,对光催化还原反应机理和中间产物进行了探究,表明金属Cu促进了TiO2对CO2的吸附,Pt促进TiO2对H2O的吸附,同时促进了CO的进一步转化.CO2 photocatalytic reduction technology is a promising renewable energy technology.In this paper,PtCu alloys of different Pt/Cu ratios were deposited on TiO2 nanocrystals using the chemical reduction method.Their physicochemical properties were analyzed by means of various characterization techniques,and the photocatalytic reduction of CO2 was evaluated.Experimental results showed that the deposition of PtCu alloy can significantly improve the photocatalytic activity and achieve 100%selectivity of CH4.In addition,the in-situ infrared spectrum analysis was carried out by a Fourier transform infrared spectrometer,and the photocatalytic reduction mechanism and intermediate products were investigated.Results show that Cu can promote the adsorption of CO2 on TiO2,and Pt can promote the adsorption of H2O on TiO2 and the further conversion of CO.

关 键 词：PtCu合金 光催化 CO2还原 产物选择性 CH4 

分 类 号：O643.36[理学—物理化学] X701[理学—化学]