摘要
传统热催化过程存在能耗较大以及活化能较高的科学问题,而光热协同催化是一种非常优异的解决手段。本文以碳纳米球为热源,Pd纳米颗粒为活性位点,半导体材料CeO_(2)为光催化剂及氧活化位点,采用液相还原法、浸渍法以及氨基酸诱导法合成了CeO_(2)/Pd/Carbon(记为PCC)光热催化剂,构建了光热协同催化反应体系。该催化反应体系具有全光谱吸收和优异光热转化能力,可以将光能转化为热能,实现对活性位点的原位加热,提高活性位点温度和反应位能;同时,其具有较优异的电荷与空穴的分离效率,可以实现对氧分子的活化,降低反应活化能,促进反应的进行。在光照强度为400 mW·cm^(-2)的条件下,其在炉温为72℃时,即可实现CO的完全转化。本工作为不同体系的光热催化剂的设计提供了一定的参考和思路。
Photo-thermal synergistic catalytic is an excellent application mean to solve the key scientific problems of high energy consumption and high activation energy in the traditional thermocatalytic process.The CeO_(2)/Pd/Carbon photothermal catalysts(denoted as PCC)were synthesized by liquid-phase reduction,impregnation and amino acid induction methods using carbon nanospheres as the heat source,Pd nanoparticles as the active site and the semiconductor material CeO_(2)as the photocatalyst and oxygen activation site,and the photothermal synergistic catalytic reaction system was constructed.The catalytic reaction system has full-spectrum absorption and excellent photothermal conversion ability,which could convert light energy into thermal energy to achieve in situ heating of the active site and increase the active site temperature and reaction potential energy;meanwhile,it has superior charge-hole separation efficiency,which could enhance the activation of oxygen molecules,reduce the reaction activation energy and promote the reaction.Under the light intensity of 400 mW·cm^(-2),its complete conversion of CO can be achieved at furnace temperature of 72℃.The work could provide some reference and ideas for the design of photothermal catalysts for different systems.
作者
刘子文
牛丽娟
孙再成
曲丹
LIU Ziwen;NIU Lijuan;SUN Zaicheng;QU Dan(Institute of Engineering Technology,Sinopec Catalyst Co.,Ltd.,Beijing 101111,China;Carbon Energy Technology(CE)Co.,Ltd.,Beijing 102400,China;College of Chemistry and Life Science,Beijing University of Technology,Beijing 100124,China)
出处
《发光学报》
北大核心
2025年第5期912-923,共12页
Chinese Journal of Luminescence
基金
国家重点研发计划(2023YFB3810800)
国家自然科学基金(22272003,22301013)。
关键词
光热催化
一氧化碳氧化
光热协同
氧活化
photothermal catalysis
carbon monoxide oxidation
photothermal synergy
oxygen activation
作者简介
刘子文(1992-),男,河北邯郸人,博士,工程师,2023年于北京工业大学获得博士学位,主要从事催化材料的制备及材料资源化循环利用研究。E-mail:liuzw2023.chji@sinopec.com;Corresponding Author:曲丹(1988-),女,黑龙江安达人,博士,教授,博士生导师,2017年于中国科学院长春光学精密机械与物理研究所获得博士学位,主要从事光功能纳米材料研究。E-mail:danqu@bjut.edu.cn。
