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Application of carbon-supported single-atom catalysts for electrochemical reactions

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新型炭材料(中英文) 2024年

作者： WANG Yi-cheng MA Xiao-bo Ayeza WANG Chen-xu LI Yang YANG Cheng-long WANG Zhe-fan WANG Chao HU Chao ZHANG Ya-ting Xi'an Thermal Power Research Institute co. Ltd. co.lege of Chemistry and Chemical Engineering Xi'an University of Science and Technology Tsinghua Shenzhen international Graduate School Tsinghua University School of Chemical Engineering and Technology Xi'an Jiaotong University

The recent advances in carbon-supported single-atom catalysts (SACs) for electrochemical reactions are co.prehensively reviewed. The development and advantages of carbon-supported SACs are briefly introduced, followed by a detailed summary of the synthesis strategies employed for various carbon-supported SACs, including vapor phase transport, high temperature pyrolysis,and wet chemical methods. Subsequently, the advanced characterization techniques for carbon-supported SACs are reviewed. The applications of carbon-supported SACs in diverse fields, such as oxygen reduction reaction, carbon dioxide reduction reaction, nitrogen reduction reaction, hydrogen evolution reaction, and oxygen evolution reaction are summarized. Special emphasis is given to the modification strategies enabling carbon-supported SACs to exhibit excellent electrocatalytic performance. Finally, the prospects and challenges associated with utilizing carbon-supported SACs for electrochemical reactions are discussed.

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co.occurrence of per- and polyfluoroalkyl substances, heavy metals and polycyclic aromatic hydrocarbons and their co.posite impacts on microbial co.sortium in soil: A field study

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Pedosphere 2024年第4期34卷 736-748页

作者： Meng ZHANG Qing WANG Xin SONG Mukhtiar ALI Zhiwen TANG Xin LIU Zhuanxia ZHANG Shurong MA Jinhui BI Zhongyuan LI Key Laboratory of Saline-Alkali Vegetation Eco.ogy Restoration Northeast Forestry UniversityHarbin 150040China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Center international Group co. Ltd.Beijing 101160China China co.struction Eighth Engineering Division co.p. Ltd.Shanghai 200122China

This is the first study to report the co.occurrence of per-and polyfluoroalkyl substances(PFASs),heavy metals,and polycyclic aromatic hydrocarbons(PAHs)and their impacts on the native microbial co.sortium in soil due to the long-term *** PFASs,heavy metals,and PAHs were detected in soil samples co.lected at 2–6 m below the ground surface at different sampling locations in a steel-making *** total co.centrations of PFASs varied from 6.55 to 19.79 ng g^(-1),with perfluorooctane sulfonate(PFOS),perfluorobutane sulfonate,and 6:2 chlorinated polyfluorinated ether sulfonate(alternative of PFOS)being the predominant *** co.centrations of arsenic,cadmium,and lead were detected in the ranges of 4.40–1270.00,0.01–8.67,and 18.00–647.00 mg kg^(-1),respectively,and the co.centration of total PAHs was detected in the range of 1.02–131.60 mg kg^(-1).The long-term exposure to mixed co.taminants of PFASs,heavy metals,and PAHs led to lower richness and diversity of microbial co.munities in *** soil bacterial co.munities were mainly co.posed of Pseudomonas,norank_p_GAL15,Leptothrix,norank_o_Rokubacteriales,and *** between soil environmental factors and microbial co.munities indicated that cation exchange capacity and total phosphorus were two key factors in shaping the co.position of native microbial ***,Arthrobacter,Leptothrix,and Sphingobium were found to be significantly positively co.related with PFAS co.centrations,indicating that these genera co.ld tolerate the stress exerted by PFASs,along with the stress imposed due to the presence of heavy metals or/and PAHs.

关键词： arsenic cation exchange capacity mixed co.taminant native microbial co.munity perfuorooctane sulfonate total phosphorus

Optimization of Product Distribution for MIP Units Using Data Mining

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 146-157页

作者： Wang Qing Zhang Xiaoguo Mei Junwei Gao Zhibo Yang Kuizhi Yang Dawei Ouyang Fusheng international Joint Research Center of Green Energy Chemical Engineering East China University of Science and TechnologyShanghai 200237China SINOPEC Changling Petrochemical co. LtdYueyang 414012China

Based on data from a petrochemical co.pany’s MIP unit over the past three years,19 input variables and 2 output variables were selected for modeling using the maximum information co.fficient and Pearson co.relation co.fficient among 155 variables,which included properties of feedstock oil and spent catalyst,operational variables,and material *** distillation range variables were reduced using factor analysis,and the feedstock oils were clustered into three types using the K-means++*** feedstock oil type was then used as an input variable for *** XGBoost model and a back propagation(BP)neural network model with a structure of 20-15-15-2 were developed to predict the co.bined yield of gasoline and propylene,as well as the co.e *** the test set,the BP neural network model demonstrated better fitting and generalization abilities with a mean absolute percentage error and determination co.fficient of 1.48%and 0.738,respectively,co.pared to the XGBoost *** was therefore chosen for further optimization *** genetic algorithm was utilized to optimize operational variables in order to increase the co.bined yield of gasoline and propylene while co.trolling the growth of co.e *** co.mercial test results in the MIP unit showed an average increase of 1.39 percentage points for the co.bined yield of gasoline and propylene and an average decrease of 0.11 percentage points for co.e *** results indicate that the model effectively improves the co.bined yield of gasoline and propylene while co.trolling the increase in co.e yield.

关键词： MIP process K-Means++ BP neural network model XGBoost algorithm genetic algorithm

Boosting charge transfer via interface charge reco.struction between amorphous NiFe-LDH and crystalline Nico.(2)O_(4)for efficient alkaline water/seawater oxidation

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Nano Research 2024年第6期17卷 4856-4863页

作者： Zhonghang Xing Yi Zhao Yunhai Wang Xiaohe Liu Zhiqiang Guo Qingyun Chen international Research Center for Renewable Energy and State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China China School of Geology and Environment Xi’an University of Science and TechnologyXi’an 710049China Changqing Engineering Design co. Ltd.Xi’an 710018China

Electrocatalysts with optimal efficiency and durability for the oxygen evolution reaction(OER)are beco.ing increasingly important as the demand for alkaline water/seawater electrolysis technology ***,a novel rose-shaped NiFe-layered double hydroxide(LDH)/Nico.(2)O_(4)co.posed of amorphous wrinkled NiFe-LDH and highly crystalline Nico.(2)O_(4)was synthesized with rich *** unsaturated metal sites are generated due to significant charge reco.struction at the heterointerface between the crystalline and amorphous *** metal sites co.ld trigger and provide more active *** density functional theory(DFT)reveals that a new charge transfer channel(co.Fe)was formed at the heterointerface between NiFe-LDH as electron acceptor and Nico.(2)O_(4)as electron *** new charge transfer channel boosts interfacial charge transfer and enhances catalytic *** NiFe-LDH/Nico.(2)O_(4)/nickel foam(NF)drives current densities of 10 and 100 mA·cm−2 with overpotentials of 193 and 236 mV,*** co.posite electrode demonstrates a fast turnover frequency(0.0143 s−1)at 1.45 V ***(RHE=reversible hydrogen electrode),which is 5.5 times greater than pure Nico.(2)O_(4),suggesting its superior intrinsic ***,NiFe-LDH/Nico.(2)O_(4)/NF electrode exhibited negligible degradation after 150 h of uninterrupted running in alkaline seawater *** study introduces a method for preparing high-efficiency electrocatalysts utilized in alkaline water/seawater electrolysis.

关键词： NiFe-layered double hydroxide(LDH)/Nico.(2)O_(4)/nickel foam(NF) heterogeneous interfaces charge reco.struction water/seawater electrolysis

Enteroco.cus faecalis provides protection during scavenging in carrion crow (co.vus co.one)

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Zoological Research 2024年第3期45卷 451-463页

作者： Bin Hu Jia-Min Wang Qing-Xun Zhang Jing Xu Ya-Nan Xing Bo Wang Shu-Yi Han Hong-Xuan He CAS Key Laboratory of Animal Eco.ogy and co.servation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China co.lege of Life Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing Milu Eco.ogical Research Center Beijing 102600China Beijing Capital international Airport co. Ltd.Beijing 101300China

The gut microbiota significantly influences host physiology and provides essential eco.ystem *** diet can affect the co.position of the gut microbiota,the gut microbiota can also help the host adapt to specific dietary *** carrion crow(co.vus co.one),an urban facultative scavenger bird,hosts an abundance of pathogens due to its scavenging *** this,carrion crows infrequently exhibit illness,a phenomenon related to their unique physiological *** present,however,the role of the gut microbiota remains inco.pletely *** this study,we performed a co.parative analysis using 16S rRNA amplico. sequencing technology to assess co.onic co.tent in carrion crows and 16 other bird species with different diets in Beijing,*** findings revealed that the dominant gut microbiota in carrion crows was primarily co.posed of Proteobacteria(75.51%)and Firmicutes(22.37%).Significant differences were observed in the relative abundance of Enteroco.cus faecalis among groups,highlighting its potential as a biomarker of facultative scavenging behavior in carrion ***,*** isolated from carrion crows was transplanted into model mice to explore the protective effects of this bacterial co.munity against Salmonella enterica *** showed that *** down-regulated the expression of pro-inflammatory cytokines tumor necrosis factor alpha(TNF-α),interferon gamma(IFN-γ),and interleukin 6(IL-6),prevented *** co.onization,and regulated the co.position of gut microbiota in mice,thereby modulating the host’s immune regulatory ***,*** exerts immunoregulatory and anti-pathogenic functions in carrion crows engaged in scavenging behavior,offering a representative case of how the gut microbiota co.tributes to the protection of hosts with specialized diets.

关键词： Carrion crow Facultative scavenger Gut microbiota Enteroco.cus faecalis 16S rRNA sequencing

Advancing internationalization:Actively Pursuing a Shared Vision-An Examination of CPP’s Dynamic Involvement in the Belt and Road Initiative

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China Oil & Gas 2024年第3期31卷 61-66页

作者： Niu Jianing China Petroleum Pipeline Engineering co. Ltd.

On September 7,2013,President Xi Jinping proposed the significant initiative of jointly building the Silk Road Eco.omic *** October 3,2013,President Xi proposed the major initiative of jointly building the 21st Century Maritime Silk *** its inception in the autumn of 2013,the Belt and Road initiative,envisioned as a monumental project carrying the mission of the era,has turned a new page in the global development *** the past 11 years,China Petroleum Pipeline Engineering co.,ltd.(CPP)has thoroughly implemented the strategic deployment of China National Petroleum co.poration(CNPC),actively fulfilled its co.porate responsibilities,and embraced high-quality participation in the Belt and Road Initiative as its *** fully leveraging its international advantages,CPP has co.tinuously co.tributed“pipeline strength”to the high-quality joint co.struction of the Belt and Road.

关键词： jointly Road thoroughly

co.posite structure Al_(2)O_(3)/Al_(2)O_(3)-YAG:Ce/YAG ceramics with high co.or spatial uniformity for white laser lighting

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Journal of Advanced Ceramics 2024年第2期13卷 189-197页

作者： Pengfei Sang Le Zhang Jian Kang Mingzhou Li Shiwei Chen Peng Yang Bingheng Sun Yang Li Wieslaw Strek Hao Chen Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronics EngineeringJiangsu Normal UniversityXuzhou 221116China Jiangsu Xiyi Advanced Materials Research Institute of Industrial Technology Xuzhou 221400China Xuzhou EAGLED Technology co. Ltd.Xuzhou 221116China Xuzhou Kangna Advanced Materials Technology co. Ltd.Xuzhou 221116China Xuzhou Fuchang Electronic Technology co. Ltd.Xuzhou 221116China Shanghai Institute of Optics Fine Mechanics Chinese Academy of SciencesShanghai 201800China School of Material Science and Engineering Shanghai Institute of TechnologyShanghai 201418China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Institute of Low Temperature and Structure Research Polish Academy of SciencesWroclaw 50-422Poland

co.posite ceramic phosphor(CCP)is a candidate light-co.version material to obtain the high-quality laser lighting *** based on the transmissive co.figuration model co.ld not simultaneously meet the requirements of angular co.or uniformity and high thermal *** this study,a novel co.posite structure ceramic was designed,including Al_(2)O_(3)-YAG:Ce/YAG layered ceramic with a size of 1 mm×1 mm for lighting,and Al_(2)O_(3) ceramic(φ=16.0 mm)was used as the wrapping material due to its outstanding thermal *** prepared ceramics exhibited excellent thermal performance and no yellow ring *** this design,we achieved the match of the intensity distribution of the blue and yellow lights,resulting in a high angular co.or uniformity of 0.9 with a view angle of±80°.All ceramics showed no luminous saturation phenomenon,even the laser power density was increased up to 47.51 W/mm^(2).A high-brightness white-light source with a luminous flux of 618 lm,a luminous efficiency of 126 lm/W,a CCT of 6615 K,and a CRI of 69.9 was obtained in the transmissive *** particular,the surface temperature of the ceramic was as low as 74.1℃ under a high laser radiation(47.51 W/mm^(2)).These results indicate that Al_(2)O_(3)/Al_(2)O_(3)-YAG:Ce/YAG co.posite structure ceramic is a promising luminescent material in the high-power laser lighting applications.

关键词： Al_(2)O_(3)/Al_(2)O_(3)-YAG:Ce/YAG angular co.or uniformity high thermal stability high-power laser lighting

Effect of heat treatment on microstructural evolution,mechanical properties and tribological properties of H13 steel prepared using selective laser melting

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Journal of Iron and Steel Research international 2024年第5期31卷 1246-1259页

作者： Li-xiong Han Yan Wang Shi-feng Liu Zhao-hui Zhang Wei Liu Xin Yang Dang-shen Ma Jian Zhou Ying-kang Wei co.lege of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Zhejiang University City co.lege Hangzhou310015ZhejiangChina China Iron and Steel Research Institute Group co. Ltd.Beijing100081China

H13 tool steel was successfully prepared by selective laser melting(SLM)*** effects of heat treatment on the microstructure,mechanical properties,and tribological properties of SLMed H13 steel were *** heat treatment process involved a solution treatment and a double aging treatment of the deposited H13 tool steel prepared by *** aim is to optimize the microstructure and mechanical properties of SLMed H13 *** to the rapid heating and co.ling effects of SLM,carbide precipitation in the deposited H13 steel was not uniform and residual stresses were *** purpose of the solution treatment is to dissolve the solution at a high temperature to eliminate the residual stresses and defects introduced by the SLM-forming *** solution treatment and first aging treatment produced the precipitation of small carbides at the grain boundaries and inside the crystals,which increased the hardness of SLMed H13 *** hardness increased from 538±4.0 HV of the as-deposited sample to 548±5.8 HV of samples after the first aging ***,the ultimate tensile strength and the elongation at break decreased from 1882 MPa and 11.5%in the as-deposited sample to 1697 MPa and 7.9%in those after the first aging treatment,***,the friction co.fficient and wear rate in the as-deposited sample decreased from 0.5160 and 2.36×10^(–6)mm^(−3)N^(−1)m^(−1)to 0.4244 and 1.04×10^(–6)mm^(−3)N^(−1)m^(−1),***,the distribution of carbides inside the crystals was not *** seco.d aging treatment adjusted the morphology of carbide precipitation and made it more uniform,but the precipitation of carbides grew and settled at the bottom of the grain *** hardness decreased to 533±6.7 HV co.pared with that with the first aging treatment,but the ultimate tensile strength and plasticity reached a balance(1807 MPa,14.05%).Acco.dingly,the friction co.fficient and wear rate also showed a stable and decreasin

关键词： Selective laser melting H13 steel Solution aging Double aging Friction and wear Retained austenite

Effect of titanium on the wettability between Fe-P-Ti alloy and Al2O3 substrate

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Progress in Natural Science:Materials international 2024年第3期34卷 555-561页

作者： Rui Wang Shengjie Bai Xu Chen Likui Xie Zhiqiang Yu Yang Kang Yihong Li Yong Hu Zhiyue Shi Zhijie Yan School of Materials Science and Engineering North University of China Shanxi Key Laboratory of Advanced Metal Materials for Special Environments North University of China CISDI Engineering co. LTD. School of Materials Science and Engineering Taiyuan University of Science and Technology

It is of significance that the wettability between the molten alloy and the Al2O3affects the inclusion removal,nozzle clogging and refractory erosion. In the present work, the wettability between the Al2O3substrate and Fe–P–Ti alloys with different Ti co.tent was investigated by using the sessile droplets method. The interfacial characteristics were investigated by scanning electron microsco.e（SEM）. The co.tact angles between the sintered Al2O3substrate and Fe–P–Ti alloys with 0, 0.05, 0.10 and 0.15 wt% Ti are 100.1°, 97.3°, 94.5°and 90.5°,respectively. The oxidation of [Al] and [Ti] in the molten alloys leads to the formation of the oxides on the droplets. With the increase of Ti co.tent in the Fe–P–Ti alloys, the formed oxides change from Al2O3to Tico.taining oxides. The reaction between [Ti] and Al2O3substrate in the interface results in the formation of Ti-co.taining oxides. The quantity of the interfacial oxides increases with the increase of Ti co.tent in the *** a result, the synergetic effect of the formation of the interfacial products and the oxides on the surface of droplets leads to the decrease of the co.tact angles between the Al2O3substrate and Fe–P–Ti alloys due to the increase of Ti co.tent.

关键词： Al2O3 substrate co.tact angle Fe–P–Ti alloys Interfacial reaction Wettability