Highly efficient and stable Ni/CeO2-SiO2 catalyst for dry reforming of methane: Effect of interfacial structure of Ni/CeO2 on SiO2
Highly efficient and stable Ni/CeO2-SiO2 catalyst for dry reforming of methane: Effect of interfacial structure of Ni/CeO2 on SiO2
复制标题
高效稳定的甲烷干重整Ni/CeO2-SiO2催化剂：Ni/CeO2界面结构对SiO2的影响
DOI：
10.1016/j.apcatb.2019.01.070
复制
发表时间：
2019-06
期刊：
影响因子：
--
通讯作者：
Yun-Xiang Pan
中科院分区：
文献类型：
--
作者：
Xiaoliang Yan;Tong Hu;Peng Liu;Sha Li;Binran Zhao;Qian Zhang;Weiyong Jiao;Shuai Chen;Pengfei Wang;Jingjun Lu;Liming Fan;Xiaonan Deng;Yun-Xiang Pan
控制金属与载体之间的界面结构和相互作用对于许多多相催化剂具有重要意义，其目的在于获得高且稳定的活性和选择性。本工作制备并设计了两种Ni/CeO 2-SiO2催化剂，即CeO 2与Ni纳米颗粒紧密接触（Ni/CeO 2-SiO2-P）和CeO 2远离Ni纳米颗粒（Ni/CeO 2-SiO2-C）的甲烷干重整催化剂。与Ni/CeO 2-SiO2-C相比，Ni/CeO 2-SiO2-P具有上级的低温活性和H2/CO比。在700 °C时，前者的CO2和CH 4转化率（87.3%和78.5%）高于后者（80.5%和67.8%）。同时，Ni/CeO 2-SiO2-P催化剂在长时间内稳定性较好，而Ni/CeO 2-SiO2-C催化剂稳定性较差，10 h后活性急剧下降。Ni/CeO 2-SiO2-P的性能和稳定性的改善源于金属-载体界面上更多的活性氧物种和甲酸盐物种更易接近的位点。在动力学研究中还计算了两种催化剂的反应级数和活化能。这项工作为探索金属载体对设计高效多相催化剂的影响开辟了新的可能性。
Manipulating interfacial structure and interaction between metal and supports is important for many heterogenous catalysts with the aim at achieving high and stable activity and selectivity. In this work, two kinds of Ni/CeO2-SiO2catalysts are fabricated and designed, including CeO2close contact with Ni nanoparticles (Ni/CeO2-SiO2-P) or CeO2away from Ni nanoparticles (Ni/CeO2-SiO2-C) for dry reforming of methane. Ni/CeO2-SiO2-P exhibits superior low-temperature activity and H2/CO ratio compared with Ni/CeO2-SiO2-C. CO2and CH4conversions on the former (87.3% and 78.5%) are higher than those of the later (80.5% and 67.8%) at 700 °C. Meanwhile, Ni/CeO2-SiO2-P is stable in the long-term study whereas Ni/CeO2-SiO2-C presents poor stability and the activity dramatically decreases in 10 h. The improved performance and stability on Ni/CeO2-SiO2-P originates from more reactive oxygen species and more accessible sites for the formate species on the metal–support interface. The reaction order and activation energy of both catalysts are also calculated in the kinetic studies. This work opens up new possibilities for exploring the effect of metal–support on designing highly efficient heterogeneous catalysts.
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La(CoxNi1-x)(0.5)Fe0.5O3钙钛矿前驱体制备的双金属Ni-Co催化剂上甲烷的干重整：催化活性和抗结焦性
DOI：
10.1016/j.apcatb.2018.12.072
发表时间：
2019
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
Wang Haiqian;Dong Xiaolei;Zhao Tingting;Yu Haoran;Li Ming
通讯作者：
Li Ming
影响因子：
22.1
作者：
Xy Xian-Yang Quek;Dapeng Liu;Wei Ni Evelyn Cheo;Hong Wang;Yuan Chen;Yanhui Yang
通讯作者：
Xy Xian-Yang Quek;Dapeng Liu;Wei Ni Evelyn Cheo;Hong Wang;Yuan Chen;Yanhui Yang
影响因子：
7.3
作者：
Ferreira-Aparicio, P;Fernandez-Garcia, M;Rodríguez-Ramos, I
通讯作者：
Rodríguez-Ramos, I
影响因子：
22.1
作者：
X. Tu;J. Whitehead
通讯作者：
X. Tu;J. Whitehead
DOI：
10.1016/j.apcatb.2017.12.078
发表时间：
2018-06
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
A. Vita;C. Italiano;L. Pino;P. Frontera;M. Ferraro;V. Antonucci
通讯作者：
A. Vita;C. Italiano;L. Pino;P. Frontera;M. Ferraro;V. Antonucci