Browsing NTNU Open by Author "Chen, De"
Now showing items 1-20 of 170
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3D aligned-carbon-nanotubes@Li2FeSiO4 arrays as high rate capability cathodes for Li-ion batteries
Zhou, Haitao; Lou, Fengliu; Vullum, Per Erik; Einarsrud, Mari-Ann; Chen, De; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2013-09-27)3D aligned-carbon-nanotubes (ACNTs)@Li2FeSiO4 nanocomposite arrays on Al foil were developed as cathode materials for Li-ion batteries. The ACNTs were grown directly on an Al foil by a chemical vapor deposition method to ... -
A Chemometric Study of Ethylene Oxychlorination
Gopakumar, Jithin (Master thesis, 2020)Ethylene oxychlorination process using a CuCl2 catalyst is widely used to manufacture Poly Vinyl Chloride (PVC). The high exothermicity of this process makes temperature control difficult. The failure of proper temperature ... -
A comprehensive kinetics study on non-isothermal pyrolysis of kerogen from Green River oil shale
Kuang, Wuqi; Lu, Mengke; Yeboah, Isaac; Qian, Gang; Duan, Xuezhi; Yang, Jia; Chen, De; Zhou, Xinggui (Journal article; Peer reviewed, 2018)Fundamentally understanding the pyrolysis kinetics of kerogen is of prime scientific and industrial importance. Herein, bitumen- and carbonates-free kerogen sample is prepared through Soxhlet extraction followed by ... -
A Performance and Kinetic Study of PEI-Impregnated Mesoporous Silica Spheres for Low-Temperature Carbon Capture.
Grinna, Jørgen Lausund (Master thesis, 2020)Karbon-fangst av røykgass er en av de mest lovende teknologiene for å bekjempe de alltid økende utslippene av drivhusgasser. Adsorpsjon av CO2 fra røykgass ved bruk av effektive solide sorbenter har vist mange fordeler, ... -
Active sites of Pt/CNTs nanocatalysts for aerobic base-free oxidation of glycerol
Pan, Minjian; Wang, Jingnan; Fu, Wenzhao; Chen, Bingxu; Lei, Jiaqi; Chen, Wenyao; Duan, Xuezhi; Chen, De; Qian, Gang; Zhou, Xinggui (Peer reviewed; Journal article, 2019)Understanding the nature of Pt active sites is of great importance for the structure-sensitive base-free oxidation of glycerol. In the present work, the remarkable Pt particle size effects on glycerol conversion and products ... -
Aligned carbon nanostructures based 3D electrodes for energy storage
Lou, Fengliu; Chen, De (Journal article; Peer reviewed, 2015)Electrochemical energy storage systems with high specific energy and power as well as long cyclic stability attract increasing attention in new energy technologies. The principles for rational design of electrodes are ... -
Atomic Insights into Robust Pt-PdO Interfacial Site-Boosted Hydrogen Generation
Chen, Wenyao; Zhang, W.Z.; Cao, J.B.; Fu, W.Z.; Qian, G.; Chen, De; Zhou, Xinggui; Duan, Xuezhi (Peer reviewed; Journal article, 2020)Suppression of catalyst deactivation without compromising activity has been a long-standing yet elusive goal in heterogeneous catalysis. Herein, we report a remarkable achievement of both hydrogen generation activity and ... -
Atomically dispersed Fe-N-P-C complex electrocatalysts for superior oxygen reduction
Li, Yahao; Chen, Bingxu; Duan, Xuezhi; Chen, Shuangming; Liu, Daobin; Zang, Ketao; Si, Rui; Lou, Fengliu; Wang, Xuehang; Rønning, Magnus; Song, Li; Luo, Jun; Chen, De (Journal article; Peer reviewed, 2019)Development of cost-effective electrocatalysts as an alternative to platinum for oxygen reduction reaction (ORR) is of great significance for boosting the applications of green energy devices such as fuel cells and metal-air ... -
Au nanoparticles deposited on the external surfaces of TS-1: Enhanced stability and activity for direct propylene epoxidation with H2 and O2
Feng, Xiang; Duan, Xuezhi; Qian, Gang; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2014)Au/TS-1 catalysts prepared by deposition–precipitation method are very promising for direct propylene epoxidation with H2 and O2. However, the catalysts usually suffer from rapid deactivation. In this work, calcined TS-1 ... -
Au/TS-1 catalyst prepared by deposition–precipitation method for propene epoxidation with H2/O2: Insights into the effects of slurry aging time and Si/Ti molar ratio
Feng, Xiang; Duan, XueZhi; Cheng, Hong-ye; Qian, Gang; Chen, De; Yuan, Wei-Kang; Zhou, Xing-Gui (Journal article; Peer reviewed, 2015)Au/TS-1 catalyst prepared by deposition–precipitation method is efficient for propene epoxidation with H2/O2, and its performance is significantly affected by the preparation parameters and the properties of support. In ... -
Au/TS‐1 catalyst for propene epoxidation with H2/O2: A novel strategy to enhance stability by tuning charging sequence
Feng, Xiang; Liu, Yibin; Li, Yichuan; Yang, Chaohe; Zhang, Zhihua; Duan, Xuezhi; Zhou, Xinggui; Chen, De (Journal article; Peer reviewed, 2016)For propene epoxidation with H2 and O2, the catalytic performance of Au/TS‐1 catalyst is extremely sensitive to preparation parameters of deposition‐precipitation (DP) method. In this work, effect of charging sequence in ... -
Au/uncalcined TS-1 catalysts for direct propene epoxidation with H2 and O2: Effects of Si/Ti molar ratio and Au loading
Feng, Xiang; Duan, Xuezhi; Yang, Jia; Qian, Gang; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2015)For direct propene epoxidation with H2/O2, TS-1 with blocked micropores (TS-1-B) is recognized as an attractive support for Au catalysts with enhanced stability and activity by suppressing the deactivation caused by micropore ... -
BEEF-vdW+U method applied to perovskites: thermodynamic, structural, electronic, and magnetic properties
Li, Yang; Zheng, Ya-Shan; Zhu, Yi-An; Sui, Zhi-Jun; Zhou, Xing-Gui; Chen, De; Yuan, Wei-Kang (Journal article; Peer reviewed, 2019)The recently developed BEEF-vdW exchange-correlation method provides a reasonably reliable description of both long-range van der Waals interactions and short-range covalent bonding between molecules and surfaces. However, ... -
Beyond the Reverse Horiuti–Polanyi Mechanism in Propane Dehydrogenation over Pt Catalysts.
Xiao, Lin; Shan, , Y.-L; Sui, Zhi jun; Chen, De; Zhou, Xinggui; Yuan, Wei-kang; Zhu, Yi-an (Peer reviewed; Journal article, 2020)The catalytic dehydrogenation of light alkanes over Pt catalysts is generally accepted to follow a reverse Horiuti–Polanyi mechanism. Using a microkinetic analysis in combination with results from density functional theory ... -
Boosted Supercapacitive Energy with High Rate Capability of aCarbon Framework with Hierarchical Pore Structure in an Ionic Liquid
Wang, Xuehang; Zhou, Haitao; Lou, Fengliu; Li, Yahao; Buan, Marthe Emelie Melandsø; Duan, Xuezhi; Walmsley, John Charles; Sheridan, Edel; Chen, De (Journal article; Peer reviewed, 2016)The specific energy of a supercapacitor (SC) with an ionic liquid (IL)-based electrolyte is larger than that using an aqueous electrolyte owing to the wide operating voltage window provided by the IL. However, the wide-scale ... -
Boosting Gravimetric and Volumetric Energy Density of Supercapacitors by 3D Pomegranate-like Porous Carbon Structure Design
Gao, Hongquan; Yang, Jianhong; Chen, De (Peer reviewed; Journal article, 2020)Recently, the heteroatom-enriched porous carbons have received considerable attention on the research of electrodes with high gravimetric capacitances for supercapacitors (SCs). However, their relatively low volumetric ... -
Boosting properties of 3D binder-free manganese oxide anodes by preformation of a solid electrolyte interphase
Zhou, Haitao; Wang, Xuehang; Sheridan, Edel; Chen, De (Journal article; Peer reviewed, 2015)Huge irreversible capacity loss prevents the successful use of metal oxide anodes in Li-ion full cells. Here, we focus on the critical prelithiation step and demonstrate the challenge of electrolyte decomposition on a ... -
Boosting Size-Selective Hydrogen Combustion in the Presence of Propene Using Controllable Metal Clusters Encapsulated in Zeolite
Shan, Yuling; Sui, Zhijun; Zhu, Yian; Zhou, Jinhong; Zhou, Xinggui; Chen, De (Journal article; Peer reviewed, 2018)A strategy is presented for making metal clusters encapsulated inside microporous solids selectively accessible to reactant molecules by manipulating molecular sieve size and affinity for adsorbed molecules. This expands ... -
Boosting Specific Energy and Power of Carbon-Ionic Liquid Supercapacitors by Engineering Carbon Pore Structures
Zhang, Dong; Gao, Hongquan; Chen, De (Peer reviewed; Journal article, 2020)Carbon-ionic liquid (C-IL) supercapacitors (SCs) promise to provide high capacitance and high operating voltage, and thus high specific energy. It is still highly demanding to enhance the capacitance in order to achieve ... -
Boosting the electrochemical performance through proton transfer for the Zn-ion hybrid supercapacitor with both ionic liquid and organic electrolytes
Zhou, Haitao; Chen, De (Peer reviewed; Journal article, 2019)Zn-ion hybrid supercapacitors have been proposed as a promising energy storage candidate compared to Li-ion hybrid technology due to the highly abundant Zn resources and their low cost. However, simultaneously achieving ...