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The origin of the extraordinary stability of mercury catalysts on the carbon support: the synergy effects between oxygen groups and defects revealed from a combined experimental and DFT study

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Chinese Journal of Catalysis 2019年第2期40卷 141-146页

作者： Jian Li Jiangtao Fan Sajjad Ali Guojun Lan Haodong Tang Wenfeng Han Huazhang Liu Bo Li Ying Li Institute of Industry Catalysis Zhejiang University of TechnologyHangzhou 310014ZhejiangChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina

Thermal stability of HgCl2 has a pivotal importance for the hydrochlorination reaction as the loss of mercuric compounds is toxic and detrimental to *** we report a low-mercury catalyst which has durability over 10000 h for acetylene hydrochlorination under the industrial *** stability of the catalyst is carefully analyzed from a combined experimental and density functional theory *** analysis shows that the extraordinary stability of mercury catalyst is resulted from the synergy effects between surface oxygen groups and defective edge *** binding energy of HgCl2 is increased to be higher than 130 kJ/mol when adsorption is at the edge site with a nearby oxygen ***,the present study revealed that the thermal stability problem of mercury-based catalyst can be solved by simply adjusting the surface chemistry of activated ***,the reported catalyst has already been successfully applied in the commercialized production of vinyl chloride.

关键词： Mercury catalysts Thermal stability Defects oxygen groups Acetylene hydrochlorination

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oxygen functional groups modified amorphous hollow carbon bowls for pseudocapacitive Zn-ion storage

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Chinese Chemical Letters 2023年第12期34卷 392-395页

作者： Gongxun Yu Fenghui Yang Xu Han Qiongyao Song Jiangtao Zheng Ying Qi Tianming Chen Qian Shen Jingxia Qiu Sheng Li Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech).Nanjing 211816China School of Physical and Mathematical Sciences Nanjing Tech University(NanjingTech).Nanjing 211816China Institute for Energy Research JiangsuUniversityZhenjiang 212013China

Carbon is a promising capacitive electrode material for Zn-ion hybrid supercapacitors(ZHSCs),as it is low-cost,environmentally friendly,controllable and *** now,achieving both high energy and high power with carbon electrodes is still challenging,limited by their intrinsic *** this work,we have designed and presented an amorphous hollow carbon bowl material with surface chemical modifications of oxygen groups to figure out these *** preparation of bowl-like structures and the storage behavior between Zn^(2+)and oxygen functional groups have also been *** the contributions from its unique hollow structure and surface functional groups,it can significantly enhance the electrode pseudocapacitance and the entire electrochemical performance.

关键词： Zn-ionhybrid supercapacitors Hollowcarbon bowls oxygen groups Pseudocapacitance Zn-ion storage

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The impact of having an oxygen-rich microporous surface in carbon electrodes for high-power aqueous supercapacitors

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Journal of Energy Chemistry 2021年第2期30卷 36-48,I0002页

作者： Servann Herou Maria Crespo Ribadeneyr Philipp Schlee Hui Luo Liviu Cristian Tanase Christine Roβberg Magdalena Titirici Chemical Engineering Department Imperial College LondonImperial College RdKensingtonLondon SW72AZUK National Institute of Materials Physics Atomiştilor 405A077125 Măgurele–IlfovRomania Fraunhofer-Zentrum für Chemisch-Biotechnologische Prozesse CBP Am Haupttor06237 LeunaGermany

The growth of electrical transportation is crucially important to mitigate rising climate change concerns regarding materials *** are high-power devices,particularly suitable for public transportation since they can easily store breaking energy due to their high-rate charging ***,they can function with two carbon electrodes,which is an advantage due to the abundance of carbon in biomass and other waste materials(i.e.,plastic waste).Newly developed supercapacitive nanocarbons display extremely narrow micropores(100 kW kg^(-1)),using fourty times less activating agent than traditionnal chemically activated *** also demonstrate that the affinity between the carbon and the electrolyte is of paramount importance to maintain rapid ionic diffusion in narrow ***,this facile synthesis method shows that low-cost and bio-based free-standing electrode materials with reliable supercapacitive performances can be used in electrochemistry.

关键词： Porous carbon materials Lignin Supercapacitors oxygen groups

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