Browsing NTNU Open by Author "Duan, Xuezhi"
Now showing items 1-20 of 30
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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 ... -
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 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 ... -
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 ... -
Charge-Tuned CO Activation over a χ‑Fe5C2 Fischer−Tropsch Catalyst
Chen, Bingxu; Wang, Di; Duan, Xuezhi; Liu, Wei; Li, Yefei; Qian, Gang; Yuan, Weikang; Holmen, Anders; Zhou, Xinggui; Chen, De (Journal article; Peer reviewed, 2018)We performed DFT calculations to understand CO activation over a χ-Fe5C2 Fischer–Tropsch catalyst. The χ-Fe5C2 catalyst exhibits unique CO activation behaviors, and the BEP relation is nearly valid for this system. The ... -
Enhanced Catalytic Performance for Propene Epoxidation with H2 and O2 over Bimetallic Au–Ag/Uncalcined Titanium Silicate-1 Catalysts
Feng, Xiang; Yang, Jia; Duan, Xuezhi; Cao, Yueqiang; Chen, Bingxu; Chen, Wenyao; Lin, Dong; Qian, Gang; Chen, De; Yang, Chaohe; Zhou, Xinggui (Journal article; Peer reviewed, 2018)Gradually emerging environmental concerns have triggered the development of highly efficient catalysts for propene epoxidation with H2 and O2. Unfortunately, intensifying the activity and stability is still a challenging ... -
Green River Kerogen Product Distribution Analysis: The Influence of Pyrolysis and Catalytic Reactions with Hydrogen-Donor Solvent
Meyer, Marthe (Master thesis, 2016)The increase in global energy consumption of petroleum, which is estimated to even surge to ca. 37% by 2035, requires substitutes from other unconventional sources of oil and gas. Utilization of oil shale by technology and ... -
Insights into Activated Carbon-Supported Platinum Catalysts for Base-Free Oxidation of Glycerol
Lei, Jiaqi; Dong, Hua; Duan, Xuezhi; Chen, Wenyao; Qian, Gang; Chen, De; Zhou, Xinggui (Journal article; Peer reviewed, 2016)Two kinds of activated carbon (AC)-supported Pt catalysts with similar particle sizes were respectively synthesized using the polyol method and incipient wetness impregnation method, and then tested for glycerol oxidation ... -
Insights into size-dependent activity and active sites of Au nanoparticles supported on TS-1 for propene epoxidation with H2 and O2
Feng, Xiang; Duan, Xuezhi; Qian, Gang; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2014)Propene epoxidation with H2/O2 is a typical structure-sensitive reaction. For a given support containing tetra-coordinated Ti species such as TS-1, the catalytic activity is greatly influenced by supported Au nanoparticle ... -
Jet fuel range hydrocarbon production from propanal: Mechanistic insights into active site requirement of a dual-bed catalyst
Yeboah, Isaac; Feng, Xiang; Wang, Gang; Rout, Kumar Ranjan; Cai, Zhenping; Duan, Xuezhi; Zhou, Xinggui; Chen, De (Peer reviewed; Journal article, 2020)Utilization of sustainable biomass to produce jet fuel range hydrocarbons is imperatively needed to mitigate CO2 emissions and to liberate the over-reliance on fossil resources. Using propanal as the feedstock, an excellent ... -
Kinetics-assisted discrimination of active sites in Ru catalyzed hydrolytic dehydrogenation of ammonia borane
Fu, Wenzhao; Chen, Wenyao; Qian, Gang; Chen, De; Yuan, Weikang; Zhou, Xinggui; Duan, Xuezhi (Journal article; Peer reviewed, 2019)Identifying the underlying nature of the structure sensitivity from the catalyst active site point of view in heterogeneous catalytic reactions is of prime scientific and industrial importance. In this work, the kinetics-assisted ... -
Mechanistic insight into size-dependent activity and durability in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane
Chen, Wenyao; Ji, Jian; Feng, Xiang; Duan, Xuezhi; Qian, Gang; Li, Ping; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2014)We report a size-dependent activity in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane. Kinetic study and model calculations revealed that Pt(111) facet is the dominating catalytically active surface. There ... -
Methyl Methacrylate Synthesis: Thermodynamic Analysis for Oxidative Esterification of Methacrolein and Aldol Condensation of Methyl Acetate
Guan, , Y.; Ma, , H.; Chen, , W; Li, , M.; Qian, Gang; Chen, De; Zhou, Xinggui; Duan, Xuezhi (Peer reviewed; Journal article, 2020)Methyl methacrylate (MMA) as a specialty monomer of polymers has motivated industry to develop clean and sustainable technologies for its production. Herein, a comprehensive thermodynamic analysis of MMA production from ... -
On the nature of Pt-carbon interactions for enhanced hydrogen generation
Chen, Wenyao; Chen, S. M.; Qian, G.; Song, L.; Chen, De; Zhou, Xinggui; Duan, Xuezhi (Peer reviewed; Journal article, 2020)Understanding the metal-support interactions in heterogeneous catalysis is critical yet complicated to tailor-design the catalysts with desirable properties. Exemplified with Pt-catalyzed ammonia borane (AB) hydrolysis, a ... -
Optimising surface d charge of AuPd nanoalloy catalysts for enhanced catalytic activity
Zhu, Xiaojuan; Qishui, Guo; Sun, Yafei; Chen, Shangjun; Wang, Jian-Qiang; Wu, Mengmeng; Fu, Wenzhao; Tang, Yanqiang; Duan, Xuezhi; Chen, De; Wan, Ying (Journal article; Peer reviewed, 2019)Understanding the catalytic mechanism of bimetallic nanocatalysts remains challenging. Here, we adopt an adsorbate mediated thermal reduction approach to yield monodispersed AuPd catalysts with continuous change of the ... -
Polymer decoration of carbon support to boost Pt-catalyzed hydrogen generation activity and durability
Chen, Wenyao; Fu, W.Z.; Chen, Bingxu; Peng, C.; Qian, G.; Chen, De; Duan, Xuezhi; Zhou, Xinggui (Peer reviewed; Journal article, 2020)Decorating the catalyst support with organic moieties to integrate multiple functionalities into metal particles offers a unique platform to promote the catalytic performance. Here, we report a mechanism-driven strategy ...