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| 1 | Ir^(0)/graphdiyne atomic interface for selective epoxidation显示文摘The development of catalysts that can selectively and efficiently promote the alkene epoxidation at ambient temperatures and pressures is an important promising path to renewable synthesis of various chemical products.Here we report a new type of zerovalent atom catalysts comprised of zerovalent Ir atoms highly dispersed and anchored on graphdiyne(Ir^(0)/GDY)wherein the Ir^(0)is stabilized by the incomplete charge transfer effect and the confined effect of GDY natural cavity.The Ir^(0)/GDY can selectively and efficiently produce styrene oxides(SO)by electro-oxidizing styrene(ST)in aqueous solutions at ambient temperatures and pressures with high conversion efficiency of∼100%,high SO selectivity of 85.5%,and high Faradaic efficiency(FE)of 55%.Experimental and density functional theory(DFT)calculation results show that the intrinsic activity and stability due to the incomplete charge transfer between Ir^(0)and GDY effectively promoted the electron exchange between the catalyst and reactant molecule,and realized the selective epoxidation of ST to SO.Studies of the reaction mechanism demonstrate that Ir^(0)/GDY proceeds a distinctive pathway for highly selective and active alkene-to-epoxide conversion from the traditional processes.This work presents a new example of constructing zerovalent metal atoms within the GDY matrix toward selective electrocatalytic epoxidation. | Zhiqiang Zheng Lu Qi Yaqi Gao Xiaoyu Luan Yurui Xue Feng He Yuliang Li | 2023 | National Science Review2023，10，8： | 1 |
| 2 | Multi-heterointerfaces for selective and efficient urea production显示文摘A major impediment to industrial urea synthesis is the lack of catalysts with high selectivity and activity,which inhibits the efficient industrial production of urea.Here,we report a new catalyst system suitable for the highly selective synthesis of industrial urea by in situ growth of graphdiyne on the surface of cobalt-nickel mixed oxides.Such a catalyst is a multi-heterojunction interfacial structure resulting in the obvious incomplete charge-transfer phenomenon between a graphdiyne and metal oxide interface and multiple intermolecular interactions.These intrinsic characteristics are the origin of the high performance of the catalyst.Studies on the me chanism reve al that the catalyst could effectively optimize the adsorption/desorption capacities of the intermediate and promote direct C-N coupling by significantly suppressing by-product reactions toward the formation of H_(2),CO,N_(2)and NH_(3).The catalyst can selectively synthesize urea directly from nitrite and carbon dioxide in water at room temperature and pressure,and exhibits a record-high Faradaic efficiency of 64.3%,nitrogen selectivity(N_(urea)-selectivity)of 86.0%,carbon selectivity(C_(urea)-selectivity)of ~100%,as well as urea yield rates of 913.2μg h^(-1)mgcat^(-1)and remarkable long-term stability. | Danyan Zhang Yurui Xue Xuchen Zheng Chao Zhang Yuliang Li | 2023 | National Science Review2023，10，2： | 1 |
| 3 | Controlled Growth of Multidimensional Interface for High-Selectivity Ammonia Production显示文摘The efficient production of ammonia by reducing nitrates at room temperature and ambient pressure is a promising alternative to the Haber-Bosch process and can effectively overcome the attendant water pollution issues.Herein,a new idea has been realized for rational and selective construction of the sp-carbon-metal-carbon interface,comprised of electronic-donating triple bonds in graphdiyne and electron-withdrawing iron carbides,for a highly efficient nitrate reduction reaction.The as-prepared sp-carbon-metal-carbon interfacial structures greatly increase the charge transfer ability and electrical conductivity of the system.The proposed concept of incomplete charge transfer has demonstrated significantly high selectivity,activity,and stability in catalytic system.The catalyst exhibits high Faradaic efficiency of over>95%and a NH3 yield rate up to 205.5μmolNH_(3) cm^(-2) h^(-1) in dilute nitrate conditions without any contaminant. | Xuchen Zheng Yurui Xue Chao Zhang Yuliang Li | 2023 | CCS Chemistry2023，5，7： | 1 |
| 4 | Changes in plant debris and carbon stocks across a subalpine forest successional series显示文摘Background:As a structurally and functionally important component in forest ecosystems,plant debris plays a crucial role in the global carbon cycle.Although it is well known that plant debris stocks vary greatly with tree species composition,forest type,forest origin,and stand age,simultaneous investigation on the changes in woody and non-woody debris biomass and their carbon stock with forest succession has not been reported.Therefore,woody and non-woody debris and carbon stocks were investigated across a subalpine forest successional gradient in Wanglang National Nature Reserve on the eastern Qinghai-Tibet Plateau.Results:Plant debris ranged from 25.19 to 82.89 Mg∙ha−1 and showed a global increasing tendency across the subalpine forest successional series except for decreasing at the S4 successional stage.Accordingly,the ratios of woody to non-woody debris stocks ranged from 26.58 to 208.89,and the highest and lowest ratios of woody to non-woody debris stocks were respectively observed in mid-successional coniferous forest and shrub forest,implying that woody debris dominates the plant debris.In particular,the ratios of coarse to fine woody debris stocks varied greatly with the successional stage,and the highest and lowest ratios were found in later and earlier successional subalpine forests,respectively.Furthermore,the woody debris stock varied greatly with diameter size,and larger diameter woody debris dominated the plant debris.Correspondingly,the carbon stock of plant debris ranged from 10.30 to 38.87 Mg∙ha−1 across the successional series,and the highest and lowest values were observed in the mid-coniferous stage and shrub forest stage,respectively.Most importantly,the carbon stored in coarse woody debris in later successional forests was four times higher than in earlier successional forests.Conclusions:The stock and role of woody debris,particularly coarse woody debris,varied greatly with the forest successional stage and dominated the carbon cycle in the subalpine forest ecosystem.Thus,preserving coarse woody debris is a critical strategy for sustainable forest management. | Zhihui Wang Lianjun Zhao Yi Bai Fei Li Jianfeng Hou Xuqing Li Yurui Jiang Yuyue Deng Bingqian Zheng Wanqin Yang | 2021 | Forest Ecosystems2021，8，3： | 0 |
| 5 | Nondestructive perception of potato quality in actual online production based on cross-modal technology显示文摘Nowadays,China stands as the global leader in terms of potato planting area and total potato production.The rapid and nondestructive detection of the potato quality before processing is of great significance in promoting rural revitalization and augmenting farmers’income.However,existing potato quality sorting methods are primarily confined to theoretical research,and the market lacks an integrated intelligent detection system.Therefore,there is an urgent need for a post-harvest potato detection method adapted to the actual production needs.The study proposes a potato quality sorting method based on cross-modal technology.First,an industrial camera obtains image information for external quality detection.A model using the YOLOv5s algorithm to detect external green-skinned,germinated,rot and mechanical damage defects.VIS/NIR spectroscopy is used to obtain spectral information for internal quality detection.A convolutional neural network(CNN)algorithm is used to detect internal blackheart disease defects.The mean average precision(mAP)of the external detection model is 0.892 when intersection of union(IoU)=0.5.The accuracy of the internal detection model is 98.2%.The real-time dynamic defect detection rate for the final online detection system is 91.3%,and the average detection time is 350 ms per potato.In contrast to samples collected in an ideal laboratory setting for analysis,the dynamic detection results of this study are more applicable based on a real-time online working environment.It also provides a valuable reference for the subsequent online quality testing of similar agricultural products. | Qiquan Wei Yurui Zheng Zhaoqing Chen Yun Huang Changqing Chen Zhenbo Wei Shuiqin Zhou Hongwei Sun Fengnong Chen | 2023 | International Journal of Agricultural and Biological Engineering2023，16，6： | 0 |
| 6 | Loading Nickel Atoms on GDY for Efficient CO_(2) Fixation and Conversion显示文摘Carbon dioxide(CO_(2))is an important and valuable C1 resource for the synthesis of numerous of value-added products. However, efficient fixation and conversion of CO_(2) into organic carbonates under mild conditions remain great challenges. Herein, graphdiyne(GDY)-based nickel atomic catalysts(Ni0/GDYs) were synthesized through a facile in-situ reduction method. Experimental results showed that the obtained Ni0/GDY had outstanding catalytic performances for converting CO_(2) into cyclic carbonates with a high reaction conversion(99%) and reaction selectivity(ca. 100%) at 80℃ and under 1 atm(1 atm=101325 Pa). Specially, the activation energy (Ea) value for the Ni0/GDY is 37.05 kJ/mol, lower than those of reported catalysts. The reaction mechanism was next carefully analyzed by using density functional theory(DFT) calculations. Such an excellent catalytic property could be mainly attributed to the high dispersion of active sites on the Ni0/GDY, and the unique incomplete charge transfer properties of GDY-based zero-valent metallic catalysts. | ZHENG Zhiqiang HE Feng XUE Yurui LI Yuliang | 2022 | Chemical Research in Chinese Universities2022，38，1： | 0 |
| 7 | Bismuth/Graphdiyne Heterostructure for Electrocatalytic Conversion of CO_(2) to Formate显示文摘Electrocatalytic CO_(2) reduction is great promising in alleviating the excessive CO_(2) emission and the conversion to valuable productions.Herein we report the in-situ controlled growth of Bismuth nanoflower/graphdiyne heterostructures(Bi/GDY)for efficient CO_(2) conversion toward formate.Based on GDY,the obtained electrocatalyst exhibits a partial current density of 19.2 mA/cm^(2) and high reaction selectivity towards formate with a high Faradic efficiency of 91.7%at−1.03 V vs.RHE,and an energy efficiency of 58.8%.The high formate yield rates could be maintained at around 300µ.mol/(cm^(2)·h)over a wide potential range.Detailed characterizations show that the unique interface structures between GDY and Bi can enhance the charge transfer ability,increase the number of active sites,and improve the long-term stability,and finally reach high-performance electrocatalytic conversion of CO_(2) to formate. | DU Yuncheng ZHENG Xuchen XUE Yurui LI Yuliang | 2022 | Chemical Research in Chinese Universities2022，38，6： | 0 |
| 8 | Peroxidase-like single Fe atoms anchored on Ti_(3)C_(2)T_(x)MXene as surface enhanced Raman scattering substrate for the simultaneous discrimination of multiple antioxidants显示文摘Single-atom nanozymes(SAzymes)are emerging as promising alternatives to mimic natural enzyme,which is due to high atomic utilization efficiency,well-defined geometric,and unique electronic structure.Herein,Fe single atoms supported on Ti_(3)C_(2)T_(x)(Fe-SA/Ti_(3)C_(2)T_(x))with intrinsic peroxidase activity is developed,further constructing a sensitive Raman sensor array for sensing of five antioxidants.Fe-SA/Ti_(3)C_(2)T_(x)shows excellent peroxidase-like performance in catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)with colorimetric reactions.X-ray adsorption fine structure(XAFS)reveals that the electron transport between the Ti_(3)C_(2)T_(x)and Fe atoms occurs along Fe-O-Ti ligands,meanwhile the density functional theory(DFT)calculations confirm the spontaneous dissociation of H_(2)O_(2)and the formation of OH radicals.Furthermore,the peroxidase-like Fe-SA/Ti_(3)C_(2)T_(x)was used as surface enhanced Raman scattering(SERS)substrate of oxidized TMB(TMB+)and achieved satisfied signal amplification performance.Using the blocking effects of free radical reactions,one-off identification of 5 antioxidants,including ascorbic acid(AA),uric acid(UA),glutathione(GSH),melatonin(Mel),and tea polyphenols(TPP),could be realized with this high identifiable catalytic property.This principle could realize 100%distinguish accuracy combined with linear discriminant analysis(LDA)and heat map data analysis.A wide detection concentration ranges from 10^(-8)to 10^(-3)M for five antioxidants was also achieved. | Hongyan Xi Hongfei Gu Yurui Han Tingting You Pengfei Wu Qingqing Liu Lirong Zheng Shuhu Liu Qiang Fu Wenxing Chen Yukun Gao Yuting Wang Penggang Yin | 2023 | Nano Research2023，16，7： | 0 |
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