Browsing NTNU Open by Author "Chen, De"

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 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 ...

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 ...

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, ...

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 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 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 ...

Boosting the energy density of 3D dual-manganese oxides-based li-ion supercabattery by controlled mass ratio and charge injection

Zhou, Haitao; Wang, Xuehang; Sheridan, Edel; Gao, Hongquan; Du, Juan; Yang, Jianhong; Chen, De (Journal article; Peer reviewed, 2016)

Supercabatteries, combining the energy of secondary batteries with the power of supercapacitors, have attracted significant attention in the energy storage research and market field. Herein, we continued our previous 3D ...