Efficient solar-driven CO_(2)-to-fuel conversion via Ni/MgAlO_(x)@SiO_(2)nanocomposites at low temperature

查看全文 作　　者：Xianglei [1]Liu;Yueyue [1]Ling;Chen [1]Sun;Hang [1]Shi;Hangbin [1]Zheng;Chao [1]Song;Ke [1]Gao;Chunzhuo [1]Dang;Nan [1]Sun;Yimin [1]Xuan;Yulong [2]Ding

机构地区：[1]School of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;[2]Birmingham Centre for Energy Storage,School of Chemical Engineering,University of Birmingham,Birmingham B152TT,United Kingdom

出　　处：《Fundamental Research》索引2024年第4卷第1期,共9页

基　　金：This work was financially supported by the Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foundation of China(51888103);the National Key R&D Program of China(2021YFF0500700);Jiangsu Natural Science Foundation Project(BE2022024 and BK20202008). 摘　　要：Solar-driven CO_(2)-to-fuel conversion assisted by another major greenhouse gas CH_(4)is promising to concurrently tackle energy shortage and global warming problems.However,current techniques still suffer from drawbacks of low efficiency,poor stability,and low selectivity.Here,a novel nanocomposite composed of interconnected Ni/MgAlOx nanoflakes grown on SiO_(2)particles with excellent spatial confinement of active sites is proposed for direct solar-driven CO_(2)-to-fuel conversion.An ultrahigh light-to-fuel efficiency up to 35.7%,high production rates of H_(2)(136.6 mmol min^(-1)g^(-1))and CO(148.2 mmol min^(-1)g^(-1)),excellent selectivity(H_(2)/CO ratio of 0.92),and good stability are reported simultaneously.These outstanding performances are attributed to strong metal-support interactions,improved CO_(2)absorption and activation,and decreased apparent activation energy under direct light illumination.MgAlO_(x)@SiO_(2)support helps to lower the activation energy of CH^(*) oxidation to CHO^(*) and improve the dissociation of CH_(4)to CH_(3)^(*) as confirmed by DFT calculations.Moreover,the lattice oxygen of MgAlO_(x) participates in the reaction and contributes to the removal of carbon deposition.This work provides promising routes for the conversion of greenhouse gasses into industrially valuable syngas with high efficiency,high selectivity,and benign sustainability. 关键词：Solar fuel CO_(2)reduction Dry reforming of methane Photothermocatalysis Stability

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Efficient solar-driven CO_(2)-to-fuel conversion via Ni/MgAlO_(x)@SiO_(2)nanocomposites at low temperature

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