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Facile synthesis of microporous carbon through a soft-template pathway and its performance in desulfurization and denitrogenation

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Journal of Natural Gas Chemistry 2010年第5期19卷 471-476页

作者： Bo Sun, Gang Li Xiaoxing Wang State Key Laboratory of Fine Chemicals Department of Catalytical Chemistry and Engineering Dalian University of Technology Dalian 116012 Liaoning China

Wormlike/lamellar microporous carbons were prepared by using long alkyl chain primary amine hydrochloride as the template and resorci- nol/formaldehyde as the carbon source under highly acidic conditions. The template can be eliminated by high temperature treatment under an inert atmosphere. The obtained carbon materials were characterized by N2 adsorption-desorption, transmission electron microscopy, ther- mogravimetry and scanning electron microscopy. The results show that dodecylamine hydrochloride surfactant can be used as the template of wormlike micropores structure while octadecylamine hydrochloride results in both lamellar and wormlike micropores. The obtained carbon materials have the similar pore size in the range of 0.5-0.59 nm, but with various morphologies such as monolith, spheres, and coralline. The microporous carbon obtained from dodecylamine hydrochloride surfactant shows good adsorption performance to remove the refractory sulfur compounds and nitrogen-containing compounds in fuel.

关键词： primary amine hydrochloride organic organic self-assemble microporous carbon adsorption

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Boron-doped microporous nano carbon as cathode material for high-performance Li-S batteries

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Nano Research 2017年第2期10卷 426-436页

作者： Feng Wu Ji Qian Weiping Wu Yusheng Ye Zhiguo Sun Bin Xu Xiaoguang Yang Yuhong Xu Jiatao Zhang Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Material Science and Engineering Beijing Institute ofTechnology Beijing 10008 I China Collaborative Innovation Center of Electric Vehicles in 8eijing Beijing 100081 China School of Computer Science Mathematics and Engineering City University of London Northampton Square London EC 1 V OHB UK State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology for Materials 8eijing University of Chemical Technology 8eijing 100029 China Research and Advanced Engineering Ford Motor Company M148121 USA Electrified Powertrain Engineering Ford Motor Research and Engineering (Nanjing) Co. Ltd. Nanjing 211100 China Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications School of MaterialScience and Engineering 8eijing Institute of Technology Beijing 100081 China

In this study, a boron-doped microporous carbon （BMC）/sulfur nanocomposite is synthesized and applied as a novel cathode material for advanced Li-S batteries. The cell with this cathode exhibits an ultrahigh cycling stability and rate capability. After activation, a capacity of 749.5 mAh/g was obtained on the 54t＂ cycle at a discharge current of 3.2 A/g. After 500 cycles, capacity of 561.8 mAh/g remained （74.96% retention）, with only a very small average capacity decay of 0.056%. The excellent reversibility and stability of the novel sulfur cathode can be attributed to the ability of the boron-doped microporous carbon host to both physically confine polysulfides and chemically bind these species on the host surface. Theoretical calculations confirm that boron-doped carbon is capable of significantly stronger interactions with the polysulfide species than undoped carbon, most likely as a result of the lower electronegativity of boron. We believe that this doping strategy can be extended to other metal-air batteries and fuel cells, and that it has promising potential for many different applications.

关键词： boron-doping microporous carbon binding energy Li-S batteries

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Metal-Organic Framework-Derived Metallic carbon with Record High Radon Gas Capture Performance

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CCS Chemistry 2024年第7期6卷 1789-1797页

作者： Shicheng Gong Yi Tao Lixi Chen Qiuting Xu Junhao Lu Fuyin Ma Xia Wang Guodong Li Jun Wan Guoxun Ji Linfeng He Xiaohui Yu Duo Zhang Xuhui Sun Zhifang Chai Shuao Wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123 Institute of Functional Nano&Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesJiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123 School of Environment and Material Engineering Yantai UniversityYantai 264005 Xi’an Research Institute of Hi-Technology Hong Qing TownXi’an 710025 Shanghai Institute of Measurement and Testing Technology Shanghai 201203 Engineering Institute of Advanced Manufacturing and Modern Equipment Technology Jiangsu UniversityZhenjiang 212013

Developing efficient adsorbents for radon(Rn)capture from the ambient environment is of paramount importance for public ***,it poses a great challenge due to the chemical inertness and extremely low molar concentration of Rn in ***,we report a zeolite imidazolate frameworkderived metallic carbon adsorbent(Zn@NPC)with record high Rn removal performance under ambient *** one-step pyrolysis,the prepared Zn@NPC possesses pores with a preference for Rn and atomically dispersed Zn sites,achieving a high Rn removal efficiency that doubles in adsorption coefficient(9.47 L·g^(−1))and triples in adsorption kinetic coefficient(20.25 mL·g^(−1)·min^(−1))over the benchmark Rn adsorbent coconut activated *** functional theory calculations elucidate the important role of the metal polarization effect,which cooperates with the pore size confinement effect to boost the overall Rn adsorption *** work launches a promising alternative for practical Rn capture.

关键词： radon removal metal-organic frameworks microporous carbon synergistic effect dynamic adsorption

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A Fe-N-C catalyst with highly dispersed iron in carbon for oxygen reduction reaction and its application in direct methanol fuel cells

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Chinese Journal of Catalysis 2016年第4期37卷 539-548页

作者：谷领峥姜鲁华李旭宁金具涛王军虎孙公权中国科学院大连化学物理研究所洁净能源国家实验室燃料电池研究部辽宁大连116023 中国科学院大连化学物理研究所穆斯堡尔谱数据中心辽宁大连116023 中国科学院大学北京100049

Exploring non‐precious metal catalysts for the oxygen reduction reaction （ORR） is essential for fuel cells and metal–air batteries. Herein, we report a Fe‐N‐C catalyst possessing a high specific surface area （1501 m2/g） and uniformly dispersed iron within a carbon matrix prepared via a two‐step pyrolysis process. The Fe‐N‐C catalyst exhibits excellent ORR activity in 0.1 mol/L NaOH electrolyte （onset potential, Eo=1.08 V and half wave potential, E1/2=0.88 V vs. reversible hydrogen electrode） and 0.1 mol/L HClO4 electrolyte （Eo=0.85 V and E1/2=0.75 V vs. reversible hydrogen electrode）. The direct methanol fuel cells employing Fe‐N‐C as the cathodic catalyst displayed promising per‐formance with a maximum power density of 33 mW/cm2 in alkaline media and 47 mW/cm2 in acidic media. The detailed investigation on the composition–structure–performance relationship by X‐ray diffraction, X‐ray photoelectron spectroscopy and Mo-ssbauer spectroscopy suggests that Fe‐N4, together with graphitic‐N and pyridinic‐N are the active ORR components. The promising direct methanol fuel cell performance displayed by the Fe‐N‐C catalyst is related to the intrinsic high catalytic activity, and critically for this application, to the high methanol tolerance.

关键词： Highly dispersed iron microporous carbon Oxygen reduction reaction Direct methanol fuel cell

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