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Nano Research 2017年第4期10卷 1258-1267页

作者： Xiaobing Bao yutong gong Jiang Deng Shiping Wang Yong Wang Advanced Materials and Catalysis Group ZJU-NHU United R&D Center Center for Chemistry of High-Performance and Novel Materials Department of Chemistry Zhejiang University Hangzhou 310028 China

The scalable preparation of multi-functional three-dimensional （3D） carbon nanotubes and graphene （CNTs-G） hybrids via a well-controlled route is urgently required and challenging. Herein, an easily operated, oxalic acid-assisted method was developed for the in situ fabrication of a 3D lasagna-like Fe-N-doped CNTs-G framework （LMFC） from a precursor designed at the molecular level. The well-organized architecture of LMFC was constructed by multi-dimensionally interconnected graphene and CNTs which derived from porous graphene sheets, to form a fundamentally robust and hierarchical porous structure, as well as favorable conductive networks. The impressive oxygen reduction reaction （ORR） performances in both alkaline and acidic conditions helped confirm the significance of this technically favorable morphological structure. This product was also the subject of research for the exploration of decisive effects on the performance of ORR catalysts with reasonable control variables. The present work further advances the construction of novel 3D carbon architectures via practical and economic routes.

关键词： well-controlled oxalic acid robust three-dimensional (3D) lasagna-like framework impressive oxygen reduction reaction (ORR) performances

Highly performed platinum nanosheets synthesized under in situ reaction conditions for hydrogen generation

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Journal of Energy Chemistry 2020年第12期29卷 272-279页

作者： Xiaobing Bao yutong gong Xiaozhong Zheng Jiayi Chen Shanjun Mao Yong Wang Advanced Materials and Catalysis Group Institute of CatalysisZhejiang UniversityHangzhou 310028ZhejiangChina

Surface properties of a catalyst, especially exposed crystal facets and coordination states, directly affect the catalyst's performance. Herein, we illustrate how reaction conditions direct the fabrication of a wellbehaved catalyst with desired structures in the case of hydrogen evolution reaction(HER). Stable adsorbed PtClxions on CNTs are in situ electrochemically reduced into a unique Pt nanosheet structure enclosed by high-index(311) and low-index(200) and(111) facets during HER process. Experimental results and density functional theory(DFT) calculation disclose the function mechanism between these unique structures and reactants. The adsorbed H2 O and reactive species act as capping agents protecting the(311) facet where the dissociation of water molecule is promoted, and the produced H*intermediates favorably combine and release on the nearby low-index Pt sites. The joint collaborations of these active sites afford Pt nanosheets comparable activity to 20 wt% Pt/C and a 12.7-fold over mass activity. These findings provide novel insight into the synthesis of heterogeneous catalysts with high specificity.

关键词： Pt nanosheet Crystal growth Reaction condition Hydrogen evolution Heterogeneous catalysis

Insight into rare-earth-incorporated catalysts:The chance for a more efficient ammonia synthesis

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Journal of Advanced Ceramics 2022年第10期11卷 1499-1529页

作者： yutong gong Hongchen LI Can LI Xiaobing BAO Hideo HOSONO Junjie WANG State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China Materials Research Center for Element Strategy Tokyo Institute of TechnologyYokohama 226-8503Japan

Recent studies have suggested that rare earth(RE)elements in catalysts significantly influence the performance of the ammonia *** REs appear in various forms in the ammonia synthesis catalysts including supports(oxides,hydrides,and nitrides),promotors,and *** the conventional RE oxide-supporting catalysts(mainly Ru/REO),some new RE-containing catalyst systems,such as electrode and nitride systems,could drive the ammonia synthesis via a benign Mars-van Krevelen mechanism or multi-active-site mode,affording high ammonia synthesis performance under mild *** works demonstrate the great potential of RE-containing catalysts for more efficient ammonia *** review summarizes the contributions of different kinds of RE-based catalysts and highlights the function mechanism of incorporated ***,an overview of this area and the challenges for further investigation are provided.

关键词： ammonia synthesis rare earth(RE) heterogeneous catalysis mild conditions mechanism

Boosting the Performance Gain of Ru/C for Hydrogen Evolution Reaction Via Surface Engineering

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Energy & Environmental Materials 2023年第5期6卷 415-424页

作者： Xiaobing Bao Yuzhuo Chen Shanjun Mao Yong Wang Yong Yang yutong gong State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Advanced Materials and Catalysis Group Institute of CatalysisDepartment of ChemistryZhejiang UniversityHangzhou 310028China

The surface properties of catalysts determine the intrinsic activity and *** is regarded as a potential candidate to substitute platinum for water electrolysis due to the low cost and analogous electronic structures while it suffers from severe dissolution and stability ***,the modification of Ru/C with atomically dispersed cobalt atoms is achieved via a simple thermal doping *** newly formed amorphous shell with Ru-Co sites on the Ru/C catalyst improved the hydrogen evolution reaction activity and stability ***,the obtained Co1Ru@Ru/CN_(x)catalyst exhibited an overpotential as low as 30 mV at 10 mA cm^(-2)in an alkaline medium,which is among the best HER catalysts reported so *** oxygen oxophile Co prevents the fast oxidation and dissolution of Ru species,ensuring outstanding long-term durability up to 70 *** calculations reveal that the Ru-Co coordination acts as a more active site for water dissociation than the ***,the"Ru-Co shell/Ru core"structures show high adaptability for the reaction *** simple doping strategy offers prospects for scalable preparation of highly active electrocatalysts.

关键词： high performance hydrogen evolution reaction ruthenium catalyst surface engineering

Three-Dimensional Simulation of Hydrodynamic Mechanism of Fluidized Bed Methanation

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Journal of Renewable Materials 2023年第7期11卷 3155-3175页

作者： Xiaojia Wang Danyang Shao Delu Chen yutong gong Fengxia An Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy&EnvironmentSoutheast UniversityNanjing210096China State Key Laboratory of Clean and Efficient Coal-Fired Power Generation and Pollutant Control China Energy Science and Technology Research Institute Co.Ltd.Nanjing210023China

Organic solid waste(OSW)contains many renewable *** pyrolysis and gasification of OSW can realize resource utilization,and its products can be used for methanation reaction to produce synthetic natural gas in the specific *** order to understand the dynamic characteristics of the reactor,a three-dimensional numerical model has been established by the method of Computational Fluid Dynamics(CFD).Along the height of the reactor,the particle distribution in the bed becomes thinner and the mean solid volume fraction decreases from 4.18%to 0.37%.Meanwhile,the pressure fluctuation range decreased from 398.76 Pa at the entrance to a much lower value of 74.47 Pa at the *** this simulation,three parameters of gas inlet velocity,operating temperature and solid particle diameter are changed to explore their influences on gas-solid multiphase *** results show that gas velocity has a great influence on particle *** the gas inlet velocity decreases from 6.51 to 1.98 m/s,the minimum height that particles can reach decreases from 169 to 100 ***,as the operating temperature increases,the particle holdup inside the reactor changes from 0.843%to 0.700%.This indicates that the particle residence time reduces,which is not conducive to the follow-up ***,with the increase of particle size,the fluctuation range of the pressure at the bottom of the reactor increases,and its standard deviation increases from 55.34 to 1266.37 Pa.

关键词： Organic solid waste methanation reactor multiphase flow three-dimensional simulation

Crystal and electronic structure engineering of tin monoxide by external pressure

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Journal of Advanced Ceramics 2021年第3期10卷 565-577页

作者： Kun LI Junjie WANG Vladislav ABLATOV yutong gong NaotoUMEZAWA Tomofumi TADA Hideo HOSONO Artem ROGANOV State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China International Center for Materials Discovery School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Samara Center for Theoretical Materials Science(SCTMS) Samara State Technical UniversitySamara 443100Russia Samara Center for Theoretical Materials Science(SCTMS) Samara UniversitySamara 443011Russia Semiconductor R&D Center Samsung ElectronicsGyeonggi-do 18448Republic of Korea Materials Research Center for Element Strategy Tokyo Institute of TechnologyKanagawa 226-8503Japan Skolkovo Institute of Science and Technology Moscow 143026Russia Moscow Institute of Physics and Technology Dolgoprudny 141700Russia

Although tin monoxide (SnO) is an interesting compound due to its p-type conductivity,a widespread application of SnO has been limited by its narrow band gap of 0.7 *** this work,we theoretically investigate the structural and electronic properties of several SnO phases under high pressures through employing van der Waals (vdW) *** calculations reveal that a metastable SnO (β-SnO),which possesses space group P2_(1)/c and a wide band gap of 1.9 eV,is more stable than α-SnO at pressures higher than 80 ***,a stable (space group P2/c) and a metastable (space group Pnma) phases of SnO appear at pressures higher than 120 *** and topological analyses show that P2/c-SnO has a high possibility to directly transform to β-SnO at around 120 *** work also reveals that β-SnO is a necessary intermediate state between high-pressure phase Pnma-SnO and low-pressure phase α-SnO for the phase transition path Pnma-SnO →β-SnO →α-*** phase transition analyses indicate that there is a high possibility to synthesize β-SnO under high-pressure conditions and have it remain stable under normal ***,our study reveals that the conductive property of β-SnO can be engineered in a low-pressure range (0-9 GPa)through a semiconductor-to-metal transition,while maintaining transparency in the visible light range.

关键词： tin monoxide van der Waals(vdW) topological relationship phase transition band gap

Study of the role of alkaline sodium additive in selective hydrogenation of phenol

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Chinese Journal of Catalysis 2019年第10期40卷 1516-1524页

作者： Yuzhuo Chen Xiangqian Kong Shanjun Mao Zhe Wang yutong gong Yong Wang Advanced Materials and Catalysis Group Institute of CatalysisDepartment of ChemsitryZhejiang UniversityHangzhou 310028ZhejiangChina

The selective hydrogenation of phenol to cyclohexanone is an important process in the chemical ***,achieving high selectivity at high conversion rates is highly challenging,particularly under continuous reaction ***,we found that the presence of Na alkaline additives(NaX,X=CO3^2–,HCO^3–,or OH^–)on Pd/Al2O3 not only promoted the phenol conversion from 8.3%to>99%but also increased the cyclohexanone selectivity from 89%to>97%during the continuous hydrogenation of phenol on a fixed bed *** 1200 h of continuous reaction,no activity or selectivity attenuation was observed and the turnover number was approximately 2.9×10^*** functional theory calculations,spectroscopic,and dynamics studies demonstrated that the addition of NaX greatly promoted phenol adsorption and hydrogen activation,thereby improving catalytic ***,the formation of a“-C=O-Na-”intermediate inhibited the excessive hydrogenation and intermolecular coupling of cyclohexanone,leading to high selectivity.

关键词： Cyclohexanone Phenol Alkaline additive Mechanism Selective hydrogenation

基于DDPM模型的化学链燃烧中二元颗粒定向分离过程放大模拟

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石油学报（石油加工） 2020年第6期36卷 1347-1353页

作者：公宇桐王晓佳张波东南大学能源热转换及其过程测控教育部重点实验室江苏南京210096

以拉格朗日法为基础,采用耦合离散元法(DEM)颗粒碰撞模型的稠密离散相模型(DDPM)对兆瓦级化学链燃烧放大系统中炭颗粒分离器进行数值模拟研究,探究其中载氧体(OC)/煤焦(Char)二元颗粒物的定向分离特性,进一步研究了热态条件和下降管出... 详细信息

以拉格朗日法为基础,采用耦合离散元法(DEM)颗粒碰撞模型的稠密离散相模型(DDPM)对兆瓦级化学链燃烧放大系统中炭颗粒分离器进行数值模拟研究,探究其中载氧体(OC)/煤焦(Char)二元颗粒物的定向分离特性,进一步研究了热态条件和下降管出口压力对二元颗粒物分离效果的影响,为炭颗粒分离器在热态条件下的运行稳定性以及下端与空气反应器之间的独立性提供数据支撑。结果表明:放大后的炭颗粒分离器因为分离空间与时间的增加,使载氧体/煤焦二元颗粒物的分离效果更好;同时,在热态条件下因气体黏度增大,使得煤焦分离效率进一步提升;此外,下降管出口压力的适度提升也能提高炭颗粒分离器的分离效率。

关键词：化学链燃烧炭颗粒分离器数值模拟稠密离散相模型(DDPM)

创建希望生态:幼儿自然场所教育的国际研究综述

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教育学术月刊 2022年第5期 29-36页

作者：宫盛花虞永平宫于彤鲁东大学教师教育学院山东烟台264000 南京师范大学教育科学学院江苏南京210024 鲁东大学继续教育学院山东烟台264000

促进幼儿与自然共处,既顺应幼儿亲生物天性又遵循自然教育规律。但工业技术化的社会现实使幼儿疏离自然,导致“大自然缺失症”“妖怪综合症”“环境世代失忆症”等多种社会性病症出现。研究基于唯物统一论有关人与自然共生互利的双主体... 详细信息

促进幼儿与自然共处,既顺应幼儿亲生物天性又遵循自然教育规律。但工业技术化的社会现实使幼儿疏离自然,导致“大自然缺失症”“妖怪综合症”“环境世代失忆症”等多种社会性病症出现。研究基于唯物统一论有关人与自然共生互利的双主体阐释力,关注指向希望生态积极运行的物质条件、环境保障和法律规章等国际研究,重视幼儿自然场所依恋的社会心理价值、自然导向场所设置的教育功能及促进幼儿自然智慧发展的现实条件。希望信念和研究效能结合达成之动态平衡,可重建幼儿与自然之联系,使之成为地球守护者并具备创造自身环境命运的能力,以治愈文化与自然之裂痕,对突围现实经济社会发展困境以及实现人自身解放具有启发意义。

关键词：希望生态幼儿教育自然场所教育研究综述

塔里木盆地南缘典型绿洲不同土壤类型土壤有机碳含量及矿化特征

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干旱区资源与环境 2017年第2期31卷 162-166页

作者：刘雨桐贡璐刘曾媛新疆大学资源与环境科学学院乌鲁木齐830046 绿洲生态教育部重点实验室乌鲁木齐830046

以塔里木盆地南缘典型绿洲于田绿洲为靶区,通过野外取样和实验分析,研究干旱区绿洲灌漠土、棕漠土、盐土和风沙土土壤有机碳含量及矿化特征,并探究有机碳矿化能力与土壤理化性质的关系。结果表明:于田绿洲不同类型土壤总有机碳含量依次... 详细信息

以塔里木盆地南缘典型绿洲于田绿洲为靶区,通过野外取样和实验分析,研究干旱区绿洲灌漠土、棕漠土、盐土和风沙土土壤有机碳含量及矿化特征,并探究有机碳矿化能力与土壤理化性质的关系。结果表明:于田绿洲不同类型土壤总有机碳含量依次为灌漠土>棕漠土>盐土>风沙土,灌漠土和棕漠土有机碳含量随土壤剖面深度增加而减少;不同类型土壤有机碳矿化累积量具有显著差异,其中灌漠土有机碳总矿化量最高,达到0.245g·kg^(-1),风沙土最低,仅有0.145g·kg^(-1);各类型土壤有机碳矿化累积量和矿化率均随土壤剖面深度增加而减少;不同类型土壤有机碳矿化累积量与有机碳含量、全氮、速效磷、速效钾呈极显著或显著正相关,而与pH值呈显著负相关。

关键词：土壤有机碳含量有机碳矿化土壤类型土壤培养法于田绿洲