气候变化领域集成服务门户(CCPortal): Synergy of the catalytic activation on Ni and the CeO 2 -TiO 2 /Ce 2 Ti 2 O 7 stoichiometric redox cycle for dramatically enhanced solar fuel production

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DOI	10.1039/c8ee03069c
	Synergy of the catalytic activation on Ni and the CeO 2 -TiO 2 /Ce 2 Ti 2 O 7 stoichiometric redox cycle for dramatically enhanced solar fuel production
	Ruan C.; Huang Z.-Q.; Lin J.; Li L.; Liu X.; Tian M.; Huang C.; Chang C.-R.; Li J.; Wang X.
发表日期	2019
ISSN	17545692
起始页码	767
结束页码	779
卷号	12 期号:2
英文摘要	Solar thermochemical approaches to CO 2 and H 2 O splitting have emerged as an attractive pathway to solar fuel production. However, efficiently producing solar fuel with high redox kinetics and yields at lower temperature remains a major challenge. In this study, Ni promoted ceria-titanium oxide (CeO 2 -TiO 2 ) redox catalysts were developed for highly effective thermochemical CO 2 and H 2 O splitting as well as partial oxidation of CH 4 at 900 °C. Unprecedented CO and H 2 production rates and productivities of about 10-140 and 5-50 times higher than the current state-of-the-art solar thermochemical carbon dioxide splitting and water splitting processes were achieved with simultaneous close to complete CH 4 conversions and high selectivities towards syngas. The underlying mechanism for the exceptional reaction performance was investigated by combined experimental characterization and density functional theory (DFT) calculations. It is revealed that the metallic Ni and the Ni/oxide interface manifest catalytic activity for both CH 4 activation and CO 2 or H 2 O dissociation, whereas CeO 2 -TiO 2 enhances the lattice oxygen transport via the CeO 2 -TiO 2 /Ce 2 Ti 2 O 7 stoichiometric redox cycle for CH 4 partial oxidation and the subsequent CO 2 or H 2 O splitting promoted by catalytically active Ni. Such findings substantiate the significance of the synergy between the reactant activation by catalytic sites and the stoichiometric redox chemistry governing oxygen ion transport, paving the way for designing prospective materials for sustainable solar fuel production. © 2019 The Royal Society of Chemistry.
英文关键词	Catalyst activity; Catalytic oxidation; Cerium oxide; Chemical activation; Density functional theory; Fuels; Hydrogen production; Oxygen; Redox reactions; Titanium dioxide; Titanium oxides; Catalytic activation; Experimental characterization; High selectivity; Lower temperatures; Partial oxidations; Reaction performance; State of the art; Water splitting; Carbon dioxide; catalysis; catalyst; fuel consumption; nickel; oxide; reaction kinetics; redox conditions; solar power; stoichiometry
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189982
作者单位	Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'An Jiaotong University, Xi'an, 710049, China; Department of Chemistry, Key Laboratory of Organic Optoelectronics and Molecular Engineering, Ministry of Education, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Ruan C.,Huang Z.-Q.,Lin J.,et al. Synergy of the catalytic activation on Ni and the CeO 2 -TiO 2 /Ce 2 Ti 2 O 7 stoichiometric redox cycle for dramatically enhanced solar fuel production[J],2019,12(2).
APA	Ruan C..,Huang Z.-Q..,Lin J..,Li L..,Liu X..,...&Wang X..(2019).Synergy of the catalytic activation on Ni and the CeO 2 -TiO 2 /Ce 2 Ti 2 O 7 stoichiometric redox cycle for dramatically enhanced solar fuel production.Energy & Environmental Science,12(2).
MLA	Ruan C.,et al."Synergy of the catalytic activation on Ni and the CeO 2 -TiO 2 /Ce 2 Ti 2 O 7 stoichiometric redox cycle for dramatically enhanced solar fuel production".Energy & Environmental Science 12.2(2019).