燃料化学学报（中英文）2024，Vol.52Issue(9)：1203-1213,11.DOI:10.1016/S1872-5813(24)60452-4
调控Ni/TiO2载体晶相结构实现高活性光热干重整制合成气
Regulating crystal phase of TiO2 to enhance catalytic activity of Ni/TiO2 for solar-driven dry reforming of methane
摘要
Abstract
Ni/TiO2 catalyst is widely employed for photo-driven DRM reaction while the influence of crystal structure of TiO2 remains unclear.In this work,the rutile/anatase ratio in supports was successfully controlled by varying the calcination temperature of anatase-TiO2.Structural characterizations revealed that a distinct TiOx coating on the Ni nanoparticles(NPs)was evident for Ni/TiO2-700 catalyst due to strong metal-support interaction.It is observed that the TiOx overlayer gradually disappeared as the ratio of rutile/anatase increased,thereby enhancing the exposure of Ni active sites.The exposed Ni sites enhanced visible light absorption and boosted the dissociation capability of CH4,which led to the much elevated catalytic activity for Ni/TiO2-950 in which rutile dominated.Therefore,the catalytic activity of solar-driven DRM reaction was significantly influenced by the rutile/anatase ratio.Ni/TiO2-950,characterized by a predominant rutile phase,exhibited the highest DRM reactivity,with remarkable H2 and CO production rates reaching as high as 87.4 and 220.2 mmol/(g·h),respectively.These rates were approximately 257 and 130 times higher,respectively,compared to those obtained on Ni/TiO2-700 with anatase.This study suggests that the optimization of crystal structure of TiO2 support can effectively enhance the performance of photothermal DRM reaction.关键词
干重整反应/光热催化/晶相/TiO2/金属-载体间相互作用Key words
dry reforming of methane/photothermal catalysis/crystal phase/TiO2/metal-support interaction分类
化学化工引用本文复制引用
何展军,龚坤,代元元,牛强,林铁军,钟良枢..调控Ni/TiO2载体晶相结构实现高活性光热干重整制合成气[J].燃料化学学报（中英文）,2024,52(9):1203-1213,11.基金项目
The project was supported by the National Key R&D Program of China(2021YFF0500702),Natural Science Foundation of Shanghai(22JC1404200),Program of Shanghai Academic/Technology Research Leader(20XD1404000),Natural Science Foundation of China(U22B20136,22293023),Science and Technology Major Project of Inner Mongolia(2021ZD0042)and the Youth Innovation Promotion Association of CAS. （2021YFF0500702）
