Browsing NTNU Open by Author "Zhou, Xinggui"
Now showing items 1-20 of 24
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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 ... -
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 ... -
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 ... -
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 ... -
Cost-efficient core-shell TS-1/silicalite-1 supported Au catalysts: Towards enhanced stability for propene epoxidation with H2 and O2
Song, Zhaoning; Feng, Xiang; Sheng, Nan; Lin, Dong; Li, Yichuan; Liu, Yibin; Chen, Xiaobo; Chen, De; Zhou, Xinggui; Yang, Chaohe (Journal article; Peer reviewed, 2018)Designing cost-effective TS-1 with enhanced catalytic stability in direct propene epoxidation with H2 and O2 is attracting tremendous research interests. In this work, a novel hydrophobic TS-1/S-1 lamellar support with ... -
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 ... -
Enhanced stability for propene epoxidation with H2 and O2 over wormhole-like hierarchical TS-1 supported Au nanocatalyst
Sheng, Nan; Liu, Zhikun; Song, Zhaoning; Lin, Dong; Feng, Xiang; Liu, Yibin; Chen, Xiaobo; Chen, De; Zhou, Xinggui; Yang, Chaohe (Journal article; Peer reviewed, 2018)Designing highly efficient Au/Ti-containing catalysts for propene epoxidation with H2 and O2 harbors tremendous scientific and industrial importance. In this work, novel hydrophobic hierarchical TS-1 (HTS-1) with wormhole-like ... -
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 hydrogen transport behavior on perovskite surfaces: Transition from the Grotthuss mechanism to the “vehicle” mechanism
Li, Qian; Yin, Qiang; Zheng, Ya-Shan; Sui, Zhi Jun; Zhou, Xinggui; Chen, De; Zhu, Yi-an (Journal article; Peer reviewed, 2019)Hydrogen transport on transition-metal oxides is a shared process in many important physical and chemical changes of interest. In this work, DFT + U calculations have been carried out to explore the mechanism for hydrogen ... -
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 ... -
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 ... -
Manipulating Gold Spatial Location on Titanium Silicalite-1 To Enhance the Catalytic Performance for Direct Propene Epoxidation with H2 and O2
Feng, Xiang; Song, Zhaoning; Liu, Yibin; Chen, Xiaobo; Jin, Xin; Yan, Wenjuan; Yang, Chaohe; Luo, Jun; Zhou, Xinggui; Chen, De (Journal article; Peer reviewed, 2018)Engineering Au spatial locations on support harbors tremendous potential to boost catalytic performance but still remains a scientific and technological challenge. Herein, we devise a strategy to manipulate Au spatial ... -
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 ... -
Origin of Chemisorption Energy Scaling Relations over Perovskite Surfaces
Li, Yang; Cheng, W; Sui, Zhi jun; Zhou, Xinggui; Chen, De; Yuan, Wei-kang; Zhu, Yi-an (Journal article; Peer reviewed, 2019)Rationally tailored perovskites ABO3 are promising substitutes for expensive noble-metal catalysts in heterogeneous catalysis. In this contribution, the BEEF-vdW + U method has been used to examine the adsorption of H, C, ... -
Propene epoxidation with H2 and O2 on Au/TS-1 catalyst: Cost-effective synthesis of small-sized mesoporous TS-1 and its unique performance
Song, Zhaoning; Feng, Xiang; Sheng, Nan; Lin, Dong; Li, Yichuan; Liu, Yibin; Chen, Xiaobo; Zhou, Xinggui; Chen, De; Yang, Chaohe (Journal article; Peer reviewed, 2018)Designing cost-effective titanium silicalite-1 (TS-1) with enhanced mass transfer ability is of prime scientific and industrial importance. In this work, a novel small-sized mesoporous TS-1 (STS-1) material is first ... -
Reaction mechanism and kinetics for hydrolytic dehydrogenation of ammonia borane on a Pt/CNT catalyst
Chen, Wenyao; Li, Dali; Wang, Zijun; Qian, Gang; Sui, Zhijun; Duan, Xuezhi; Zhou, Xinggui; Yeboah, Isaac; Chen, De (Journal article; Peer reviewed, 2017)A reaction mechanism is proposed for hydrolytic dehydrogenation of ammonia borane on a Pt/CNT catalyst. A combination of thermodynamic analysis and FTIR measurement reveals that B‐containing byproducts are mainly in the ... -
Reaction mechanism and kinetics for Pt/CNTs catalyzed base-free oxidation of glycerol
Ma, Yuanyuan; Gan, Jie; Pan, Minjian; Zhang, Yanfang; Fu, Wenzhao; Duan, Xuezhi; Chen, Wenyao; Chen, De; Qian, Gang; Zhou, Xinggui (Journal article; Peer reviewed, 2019)Fundamental understanding of heterogeneously catalyzed aerobic, base-free oxidation of glycerol is highly desirable for sustainable and highly efficient chemical synthesis. In this work, Pt/CNTs catalyzed base-free oxidation ...