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Balancing electron transfer and intermediate adsorption ability of metallic Ni-Fe-RE-P bifunctional catalysts via 4f-2p-3d electron interaction for enhanced water splitting

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Journal of Energy Chemistry 2024年第7期94卷 458-465页

作者： Hong-Rui Zhao Cheng-Zong Yuan Chenliang Zhou Wenkai Zhao Lunliang Zhang Cong-Hui Li Lei Xin Fuling Wu shufeng ye Xiaomeng Zhang Yunfa Chen School of Rare Earths University of Science and Technology of ChinaHefei 230026AnhuiChina Jiangxi Province Research Institute of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341119JiangxiChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Balancing electron transfer and intermediate adsorption ability of bifunctional catalysts via tailoring electronic structures is crucial for green hydrogen production,while it still remains challenging due to lacking efficient ***,one efficient and universal strategy is developed to greatly regulate electronic structures of the metallic Ni-Fe-P catalysts via in-situ introducing the rare earth(RE)atoms(Ni-Fe-RE-P,RE=La,Ce,Pr,and Nd).Accordingly,the as-prepared optimal Ni-Fe-Ce-P/CC self-supported bifunctional electrodes exhibited superior electrocatalytic activity and excellent stability with the low overpotentials of 247 and 331 mV at 100 mA cm^(-2) for HER and OER,*** the assembled electrolyzer,the Ni-Fe-Ce-P/CC as bifunctional electrodes displayed low operation potential of 1.49 V to achieve a current density of 10 mA cm^(-2),and the catalytic performance can be maintained for 100 *** results combined with density functional theory(DFT)calculation reveal that Ce doping leads to electron decentralization and crystal structure distortion,which can tailor the band structures and d-band center of Ni-Fe-P,further increasing conductivity and optimizing intermediate adsorption *** work not only proposes a valuable strategy to regulate the electron transfer and intermediate adsorption of electrocatalysts via RE atoms doping,but also provides a deep under-standing of regulation mechanism of metallic electrocatalysts for enhanced water splitting.

关键词： RE atoms Electron transfer Adsorption energy Oxygen evolution Hydrogen evolution

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作为公民德性的“友善”:学理逻辑与培育路径

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哲学动态 2024年第5期 109-115页

作者：叶舒凤南京信息工程大学马克思主义学院

社会主义核心价值观之“友善”关乎公民常态化的社会交往以及良序政治共同体构建。友善观的培育与践行离不开对友善的思想实质与本质特征的深层次揭示。德性伦理学以培育个体的道德品性为重点,关注道德行为者本身,强调建构完整的道德人... 详细信息

社会主义核心价值观之“友善”关乎公民常态化的社会交往以及良序政治共同体构建。友善观的培育与践行离不开对友善的思想实质与本质特征的深层次揭示。德性伦理学以培育个体的道德品性为重点,关注道德行为者本身,强调建构完整的道德人格,可以为公民友善观的阐释与培育提供有效的解释思路。友善是公民在社会交往中展现的稳定的道德品质,公民友善在共同体中养成与获得,其最终价值目标在于实现公民的幸福生活。公民友善内在包含友善的道德认知、友善的道德情感和友善的道德行动三个方面。友善价值观培育可以遵循德性的一般性获得方式,即以“情”生善、以“境”育善和以“行”促善。

关键词：德性伦理学公民德性友善观培育路径

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城市轨道交通线路纳入新一轮建设规划论证——以广州市10号线东延段为例

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交通与港航 2024年第4期11卷 58-63,75页

作者：莫琼刘尔辉赵雪叶树峰广州市交通规划研究院有限公司

以广州市城市轨道交通规划10号线东延段为例,在现状与规划分析相结合的基础上,分析线路及沿线周边概况等方案背景;从满足出行需求、完善线网结构、支撑城市规划三个宏观方面,进行10号线东延段纳入新一轮建设规划的必要性和紧迫性分析论... 详细信息

以广州市城市轨道交通规划10号线东延段为例,在现状与规划分析相结合的基础上,分析线路及沿线周边概况等方案背景;从满足出行需求、完善线网结构、支撑城市规划三个宏观方面,进行10号线东延段纳入新一轮建设规划的必要性和紧迫性分析论证;针对线路实际的沿线土地利用规划和客流需求,开展线站位方案比选,优化车辆基地选址,定量分析线路建设对于既有线路的客流影响以及线路指标与国家政策的符合性。规划广州市10号线东延段从宏观与微观的角度系统性论证了轨道交通线路建设方案,为后续规划轨道交通线路纳入新一轮建设规划提供借鉴指导。

关键词：城市轨道交通建设规划建设方案论证广州市

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Removal of cyanide adsorbed on pyrite by H_2O_2 oxidation under alkaline conditions

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Journal of Environmental Sciences 2019年第4期31卷 287-292页

作者： Yubo Tu Peiwei Han Lianqi Wei Xiaomeng Zhang Bo Yu Peng Qian shufeng ye State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of Sciences University of Chinese Academy of Sciences

Large amounts of cyanide tailings are produced during the cyanidation process in gold extraction,which are hazardous solid wastes due to the toxic *** is one of the main minerals in cyanide *** removal of cyanide adsorbed on pyrite by H_2O_2 oxidation under alkaline conditions was investigated in this *** was found that the removal efficiency was positively correlated with pH from 5 to 12,but remained almost constant when pH was higher than *** highest cyanide removal efficiency of 91.10% was achieved by adding no less than 0.6 wt.% of H_2O_*** removal was positively correlated with the CN^-adsorption amount between 1.06 and 8.5 mg/g,and temperature between 25 and 85°*** removal of cyanide adsorbed on pyrite by H_2O_2 oxidation under alkaline conditions was due to the oxidation of ***,thiocyanate and sulfate were generated with mole ratios of about 2.03:1.12:3.17 during the cyanide removal.?2018 The Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences.

关键词： Cyanide removal Pyrite H2O2 oxidation Alkaline conditions

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Preparation and characterization of a novel hybrid chelating material for effective adsorption of Cu(Ⅱ)and Pb(Ⅱ)

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Journal of Environmental Sciences 2018年第5期30卷 224-236页

作者： Ya Liu Peng Qian Yang Yu Bo Yu Yongliang Wang shufeng ye Yunfa Chen State Key Laboratory of Multiphase Complex Systems institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Lakehead University Thunder BayON PTB 5E1Canada University of Chinese Academy of Sciences Beijing 100049China

The discharge of heavy metal ions such as Cu^2＋and Pb^2＋poses a severe threat to public health and the environment owing to their extreme toxicity and bioaccumulation through food chains Herein, we report a novel organic–inorganic hybrid adsorbent, Al（OH）3-poly（acrylamide dimethyldiallylammonium chloride）-graft-dithiocarbamate（APD）, for rapid and effectiv removal of Cu^2＋and Pb^2＋. In this adsorbent, the ＂star-like＂ structure of Al（OH）3 poly（acrylamide-dimethyldiallylammonium chloride） served as the support of dithiocarbamat（DTC） functional groups for easy access of heavy metal ions and assisted development of larg and compact floccules. The synthesized adsorbent was characterized by scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, Fourier transform infrared spectroscopy（FTIR）, and thermogravimetric analysis（TGA）. APD was demonstrated to hav rapid adsorption kinetics with an initial rate of 267.379 and 2569.373 mg/（g·min） as well a superior adsorption capacities of 317.777 and 586.699 mg/g for Cu2＋and Pb2＋respectively. Th adsorption process was spontaneous and endothermic, involving intraparticle diffusion and chemical interaction between heavy metal ions and the functional groups of APD. To assess it versatility and wide applicability, APD was also used in turbid heavy metal wastewater, and performed well in removing suspended particles and heavy metal ions simultaneously through flocculation and chelation. The rapid, convenient and effective adsorption of Cu^2＋and Pb^2＋give APD great potential for heavy metal decontamination in industrial applications.

关键词： Hybrid polymer Dithiocarbamate Heavy metal ions Adsorption

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Effect of process conditions on the synthesis of carbon nanotubes by catalytic decomposition of methane

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China Particuology 2007年第3期5卷 213-219页

作者： Shuanglin Zhan Yajun Tian Yanbin Cui Hao Wu Yonggang Wang shufeng ye Yunfa Chen Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China Graduate University of Chinese Academy of Sciences Beijing 100049 China China University of Mining and Technology Beijing 100083 China

A new dual-composition catalyst based on Ni-Mo/MgO with high efficiency of producing carbon nanotubes （CNTs） from methane was reported recently. In the present article, with this type of catalyst, the impact of such experimental parameters as reaction temperature, reaction time, concentration of H2, flow rate ratio of CH4 to H2 on yield and graphitization were investigated, leading to the following optimal growth conditions： reaction time 60min, reaction temperature 900℃, CH4：H2 about 100：20mL/min, under which high-yield multi-walled CNTs bundles were synthesized. Raman measurement indicated that the as-synthesized product was well-graphitized, and the purity was estimated over 95% by TG-DSC analysis. In terms of the above results, an explanation of high-efficiency formation of CNTs bundles and the co-catalysis mechanism of Ni-Mo/MgO were suggested. 2007 Chinese Societv of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V.

关键词： Carbon nanotubes Catalytic decomposition Carbon yield Graphitization degree

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Coastal blue carbon： Concept, study method, and the application to ecological restoration

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Science China Earth Sciences 2018年第6期61卷 637-646页

作者： Jianwu TANG shufeng ye Xuechu CHEN Hualei YANG Xiaohong SUN Faming WANG Quan WEN Shaobo CHEN Marine Biological Laboratory Woods Hole 02543 USA College of Ecology and Environmental Science East China Normal University State Key Laboratory of Estuarine and Coastal Research Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration Shanghai 200241 China East China Sea Branch of State Oceanic Administration Shanghai 200137 China Marine College Shandong University (Weihai) Weihai 264209 China Environmental Monitoring Center State Oceanic Administration Dalian 116203 China Zhejiang Mariculture Research Institute Wenzhou 325005 China

Coastal blue carbon refers to the carbon taken from atmospheric CO2; fixed by advanced plants(including salt marsh,mangrove, and seagrass), phytoplankton, macroalgae, and marine calcifiers via the interaction of plants and microbes; and stored in nearshore sediments and soils; as well as the carbon transported from the coast to the ocean and ocean floor. The carbon sequestration capacity per unit area of coastal blue carbon is far greater than that of the terrestrial carbon pool. The mechanisms and controls of the carbon sink from salt marshes, mangroves, seagrasses, the aquaculture of shellfish and macroalgae, and the microbial carbon pump need to be further studied. The methods to quantify coastal blue carbon include carbon flux measurements, carbon pool measurements, manipulative experiments, and modeling. Restoring, conserving, and enhancing blue carbon will increase carbon sinks and produce carbon credits, which could be traded on the carbon market. The need to tackle climate change and implement China's commitment to cut carbon emissions requires us to improve studies on coastal blue carbon science and policy. The knowledge learned from coastal blue carbon improves the conservation and restoration of salt marshes,mangroves, and seagrasses; enhances the function of the microbial carbon pump; and promotes sustainable aquaculture, such as ocean ranching.

关键词：学习方法沿海碳浮游植物生态微生物相互作用气候变化

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Separation of chalcopyrite and pyrite from a copper tailing by ammonium humate

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1814-1821页

作者： Cuicui Lü Yongliang Wang Peng Qian Ya Liu Guoyan Fu Jian Ding shufeng ye Yuanfa Chen Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Copper tailings constitute a large proportion of mine wastes. Some of the copper tailings can be recycled to recover valuable minerals. In this paper, a copper tailing was studied through the chemical analysis method, Xray diffraction and scanning electron microscope-energy dispersive spectrum. It turned out that chalcopyrite(Cu) and pyrite(S) were the main recoverable minerals in the tailing. In order to separate chalcopyrite from pyrite in low pulp pH, ammonium humate(AH) was singled out as the effective regulator. The depression mechanism of AH on the flotation of pyrite was proved by FTIR spectrum and XPS spectrum, demonstrating that there was a chemical adsorption between AH and pyrite. By Response Surface Methodology(RSM), the interaction between AH, pulp pH and iso-butyl ethionine(Z200) was discussed. It was illustrated that the optimal dosage of AH was 1678 g·t^(-1) involving both the recovery of Cu and S. The point prediction by RSM and the closed-circuit flotation displayed that the qualified Cu concentrate and S concentrate could be obtained from the copper *** study indicated that AH was a promising pyrite depressor in the low pulp pH from copper tailings.

关键词：黄铜矿黄铁矿跟踪扫描电子显微镜分离化学分析方法铵射线衍射

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Influence of a Protective Coating Slurry on Enhancing the Descaling Ability and Oxidation Resistance of 9% Nickel Steel

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Journal of Wuhan University of Technology(Materials Science) 2014年第6期29卷 1252-1257页

作者：何影魏连启 ZHANG Xiaomeng ZHOU Xun WANG Shuhua SHAN Xin ye shufeng State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Shougang Jingtang United Iron & Steel Co. Ltd. Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences

A kind of ceramic slurry was prepared and sprayed onto the surface of 9Ni steel at room temperature. The coating layer will not only reduce the depth of the formed Ni-enriched entanglement at high temperature but also have an excellent ability to resist oxidation of the 9Ni steel. Compared to bare specimen, the depths of the entanglement of the coated 9Ni specimen could be successfully reduced by 74.1% and the oxidation loss be decreased by 62.3% by heating at 1 250 ℃ for 60 min. In addition, the coated specimen indicates no trace of oxide pegs. It proves that the coating has outstanding improvement to internal oxidation resistance. Some characterization methods such as metalloscopy, XRD, XPS, SEM and EDX have been used to reveal a possible protective mechanism. The result shows that the coating layer reacts with the iron oxide to form Mg Fe2O4 on the surface of the coated specimen, which could provide a smaller diffusion coefficient rate of Fe ion. The coating with a low cost and easy implementation is promisingly applicable in the slab-reheating process of the 9Ni steel.

关键词： 9Ni steel protective coating oxidation resistance descaling ability

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TAILORING OF PORE SIZE IN MESOPOROUS SILICA WITH STEARIC ACID AND PVP

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China Particuology 2005年第6期3卷 379-382页

作者： Haidi Liu shufeng ye Yunfa Chen Multi-phase Reaction Engineering Laboratory Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 P.R. China

Mesoporous silica was prepared using tetrathoxysilane （TEOS）, cetadecyltrimethylammonium bromide （CTAB）, aqueous ammonia, acetone and water as silica source, template agent, precipitator and solvent respectively. Stearic acid and polyvinylpyrrolidone （PVP） were employed as additional templates to tailor the pore size in the resultant porous silica. BET, SAXRD and SEM analyses were used to characterize the surface area, pore size, pore structure, pore regularity and morphology of the sample. BET measurement results showed that PVP could increase the surface area but diminish the pore size while stearic acid could decrease the surface area but enlarge the pore size. SAXRD analysis indicated that more additional template introduction gave rise to less order-structured products. All these various results could be attributed to the differently modified CTAB micelles involving stearic acid and PVP addition.

关键词： mesoporous silica PVP stearic acid pore size tailoring

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