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| 1 | Recent progress and prospect of carbon-free single-site catalysts for the hydrogen and oxygen evolution reactions显示文摘The key challenge for scalable production of hydrogen from water lies in the rational design and preparation of high-performance and earth-abundant electrocatalysts to replace precious metal Pt and IrO_(2) for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Although atomic M-N-C materials have been extensively studied in heterogeneous catalysis field,the insufficient antioxidant capacity of carbonous substrates hinders their practical application in OER.Developing highly active and stable OER electrocatalysts is the key for electrochemical water splitting.This review presents feasible design strategies for fabricating carbon-free single-site catalysts and their applications in HER/OER and overall water splitting.The constitutive relationships between structure,composition,and catalytic performance for HER and OER are detailly discussed,providing ponderable insights into rationally constructing high-performance HER and OER electrocatalysts.The perspectives on the challenges and future research orientations in single-site catalysts for electrochemical water splitting are suggested. | Jingqi Guan Xue Bai Tianmi Tang | 2022 | Nano Research2022，15，2： | 4 |
| 2 | Atomic manganese coordinated to nitrogen and sulfur for oxygen evolution显示文摘Lack of high-efficiency,cost-efficient,and well-stocked oxygen evolution reaction(OER)electrocatalysts is a main challenge in large-scale implementation of electrolytic water.By regulating the electronic structure of isolated single-atom metal sites,highperformance transition-metal-based catalysts can be fabricated to greatly improve the OER performance.Herein,we demonstrate single-atom manganese coordinated to nitrogen and sulfur species in two-dimensional graphene nanosheets MnNSG(NSG means N-and S-codoped graphene)as an active and durable OER catalyst with a low overpotential of 296 mV in alkaline media,compared to that of the benchmark IrO_(2) catalyst.Theoretical calculations and experimental measurements reveal that the Mn-N3S sites in the graphene matrix are the most active sites for the OER due to modified electronic structure of the Mn site by three nitrogen and one sulfur atoms coordination,which show lower theoretical overpotential than the Mn-N4 sites and over which the O–O formation step is the rate-determining step. | Xue Bai Liming Wang Bing Nan Tianmi Tang Xiaodi Niu Jingqi Guan | 2022 | Nano Research2022，15，7： | 3 |
| 3 | Genetic diversity and relatedness analysis of nine wild species of tree peony based on simple sequence repeats markers显示文摘Tree peony has nine wild species,but the evolutionary relationship of them is still unclear.Here,a total of 274 specimens from 22 natural populations of nine wild species were collected,and their genetic diversity and similarity was analyzed based on Simple Sequence Repeats(SSR)molecular markers.A total of 106 alleles were generated based on 20 primers and with an average of 5.3 alleles per primer.Shannon’s information index(I)ranged from 0.6333 to 1.7842,and the average of Nei’s genetic diversity coefficient(H)was 0.5771.Polymorphism Information Content(PIC)value varied from 0.29 to 0.77,ten of these primers had high polymorphism(PIC≥0.50).All the above genetic parameters of primers reflect more rich genetic diversity information compared with other researches using SSR molecular markers to study the genetic diversity of tree peony wild species.At the population level,the lowest and highest degree of genetic diversity occurred in Paeonia ludlowii-P1 and P.delavayi-P3 population,respectively.Whereas at species level,the genetic diversity of 9 wild peony species was as follows:P.lutea>P.delavayi>P.rockii>P.qiui>P.ostii>P.decomposita>P.potaninii>P.spontanea>P.ludlowii.Furthermore,cluster analysis at species level divided the nine wild tree peony species into two branches.In branch I,the closest phylogenetic relationship was found between P.ostii and P.rockii,followed by P.spontanea,P.qiui,and P.decomposita.In branch II,the closest relationship occurred between P.lutea and P.delavayi,followed by P.potaninii and P.ludlowii.Clustering results supported the division of tree peonies into two subsects(Delavayanae and Vaginatae),it also supported P.potaninii and P.ludlowii as independent species.The results provided novel insight into the genetic diversity and phylogenetic relationship of nine wild tree peony species.It will help formulate comprehensive protection measures of wild germplasm resources and select proper parents for distant hybridization in the future. | Yuqian Xue Rong Liu Jingqi Xue Shunli Wang Xiuxin Zhang | 2021 | Horticultural Plant Journal2021，7，6： | 1 |
| 4 | Ethylene-influenced flower opening and expression of genes encoding Etrs , Ctrs , and Ein 3 s in two cut rose cultivars显示文摘 | Hui Tan Xiaohui Liu Nan Ma Jingqi Xue Wangjin Lu Jinghe Bai Junping Gao | 2006 | Postharvest Biology and Technology2006，，2： | 1 |
| 5 | On the role of physiological substances, abscisic acid and its biosynthetic genes in seed maturation and dormancy of tree peony (Paeonia ostii 'Feng Dan' ) 显示文摘 | Jingqi Xue Shunli Wang Ping Zhang | 2015 | Biochemical and Biophysical Research Communications2015，459，3： | 1 |
| 6 | Synergy between isolated Fe and Co sites accelerates oxygen evolution显示文摘Dual-metal catalysts with synergistic effect exhibit enormous potential for sustainable electrocatalytic applications and mechanism research.Compared with mono-metal-site catalysts,dual-metal-site catalysts exhibit higher efficiency for the oxygen evolution reaction(OER)due to reduced energy barrier of the process involving proton-coupled multi-electron transfer.Herein,we construct dual-metal Fe-Co sites coordinated with nitrogen in graphene(FeCo-NG),which exhibits high OER performance with onset overpotential of only 126 mV and Tafel slope of 120 mV·dec^(−1),showing that the rate-determining step is controlled by the single-electron transfer step.Theoretical calculations reveal that the FeN_(4)site exhibits lower OER overpotential than the CoN_(4)site due to appropriate adsorption energy of OOH*on the former,while the O^(*)adsorbed on the adjacent Co site could stabilize the OOH*on the FeN_(4)site through hydrogen bond interaction. | Tianmi Tang Zhiyao Duan Didar Baimanov Xue Bai Xinyu Liu Liming Wang Zhenlu Wang Jingqi Guan | 2023 | Nano Research2023，16，2： | 1 |
| 7 | Rh-PIP2;1, a rose aquaporin gene, is involved in ethylene-regulated petal ex- pansion 显示文摘 | MA Nan XUE Jingqi LI Yunhui | 2008 | Plant Physiol2008，148，2： | 1 |
| 8 | Molecular Cloning and Expression Analysis of Cryptochrome Gene Ps CRY2in Tree Peony显示文摘Cryptochromes are blue/ultraviolet-A(UV-A) light receptors involved in regulating various aspects of plant growth and development.Investigations of the structure and functions of cryptochromes in plants have largely focused on herbaceous plants. However, few data on the function of CRY2 are available in woody plants. In this study, a cryptochrome 2(CRY2) gene was isolated from Paeonia suffruticosa by Reverse Transcription Polymerase Chain Reaction(RT-PCR). Sequence alignment and motif analysis showed that the deduced amino acids contained a PHR domain near the amino terminus and a CCT domain near the carboxy terminus. Ps CRY2 showed high identity with At CRY2 of Arabidopsis.Phylogenetic analysis indicated that it was closely related to Citrus sinensis. Gene expression analysis revealed that the highest expression levels of Ps CRY2 occurred in the bud and seed embryo of P. suffruticosa, followed by the roots, stems, and leaves. Ps CRY2 was upregulated during the entire process of bud differentiation, whereas this was downregulated during the early stage of bud development and upregulated in the middle and late stages. The highest level of Ps CRY2 expression was observed in the big bell-like flower buds. These results suggested that Ps CRY2 plays an important role in both bud differentiation and bud development. The expression patterns of Ps CRY2 in the buds of ‘Luoyanghong' and ‘Qiufa1' were similar, whereas that in the buds of ‘Qiufa 1' was significantly higher than in the buds of ‘Luoyanghong'. The buds of plants subjected to different photoperiod treatments exhibited variations in Ps CRY2 expression patterns. The expression of Ps CRY2 decreased during bud sprouting and in the small bell-like flower buds that were subjected to short-day photoperiod compared to that observed under long-day photoperiod. | REN Xiuxia WANG Shunli XUE Jingqi ZHU Fuyong LIU Chuanjiao ZHANG Xiuxin | 2016 | Horticultural Plant Journal2016，2，6： | 1 |
| 9 | Multiwalled Carbon Nanotubes Modified with Silylated-salicylaldimine Co(II) and Pd(II) Complexes as Precatalysts in Ethylene Oligomerization显示文摘MWCNTs-Co(II) and Pd(II) were prepared through grafting silylated-salicylaldimine Pd(II) and Co(II) on multiwalled carbon nanotubes(MWCNTs) for ethylene oligomerization. The structures of the two MWCNTs-supported catalysts were characterized by means of scanning electron microscopy(SEM), X-ray diffraction(XRD), Fourier transform infrared(FTIR) spectroscopy, thermogravimetric analyses(TGA) and nitrogen adsorption and desorption. And the influence of the supported pattern on the catalytic properties for ethylene oligomerization was investigated. The results revealed that the silylated-salicylaldimine complexes were grafted on the inner and outer surfaces of the carbon nanotubes and the pore size and BET surface area of MWCNTs decreased. Compared with the homogeneous catalysts, the two MWCNTs-supported catalysts had higher selectivity for hexene and 1-hexene in the presence of diethylaluminum chloride(DEAC) with a small molecule size due to confinement effect. MWCNTs-Pd exhi-bited higher activity and higher selectivity for C8+ olefin compared to MWCNTs-Co due to electronic factors. The catalytic activities of MWCNTs-Pd and MWCNTs-Co decreased from 24.18×105g·(mol Pd·h)–1 and 20.57×105g·(mol Co·h)–1 to 19.79×105g·(mol Pd·h)–1 and 13.14×105g·(mol Co·h)–1 after the third recycle reaction, respectively. | XUE Jingqi LI Feng ZHAI Xue LI Dan GUO Lijun LI Cuiqin | 2022 | Chemical Research in Chinese Universities2022，38，2： | 0 |
| 10 | The d-orbital regulation of isolated manganese sites for enhanced oxygen evolution显示文摘Developing transition metal-nitrogen-carbon materials(M-N-C)as electrocatalysts for the oxygen evolution reaction(OER)is significant for low-cost energy conversion systems.Further d-orbital adjustment of M center in M-N-C is beneficial to the improvement of OER performance.Herein,we synthesize a single-Mn-atom catalyst based on carbon skeleton(Mn_(1)-N_(2)S_(2)C_(x))with isolated Mn-N_(2)S_(2)sites,which exhibits high alkaline OER activity(η10=280 mV),low Tafel slope(44 mV·dec^(−1)),and excellent stability.Theoretical calculations reveal the pivotal function of isolated Mn-N_(2)S_(2)sites in promoting OER,including the adsorption kinetics of intermediates and activation mechanism of active sites.The doping of S causes the increase in both charge density and work function of active Mn center,and ortho-Mn_(1)-N_(2)S_(2)C_(x)expresses the fastest OER kinetics due to the asymmetric plane. | Xue Bai Jingyi Han Xiaodi Niu Jingqi Guan | 2023 | Nano Research2023，16，8： | 0 |
| 11 | Surface reconstruction and structural transformation of twodimensional Ni-Fe MOFs for oxygen evolution in seawater media显示文摘As a four-electron transfer reaction,oxygen evolution reaction(OER)is limited by large overpotential and slow kinetics.Here,we in-situ synthesized two-dimensional(2D)Ni-Fe metal-organic framework nanosheets on nickel foam(NixFe-TPA/NF,TPA=terephthalic acid)for oxygen evolution in alkaline and alkaline seawater electrolytes.In 1 M KOH,Ni3Fe-TPA/NF shows a low overpotential(η10)of 189 mV at 10 mA·cm^(-2) and an ultra-low overpotential of only 260 mV at 500 mA·cm^(-2).In alkaline seawater,Ni3Fe-TPA/NF still provides impressive OER performance,with anη10 of 265 mV.In-situ Raman characterization results show that the phase transition occurs during the OER,and Ni3FeOOH with more oxygen vacancies is in-situ formed,reducing the OER energy barrier.Density functional theory(DFT)reveals that the synergy between Ni and Fe reduces the energy barrier and accelerates the rate-determining step.In addition,the ultra-thin 2D sheet structure and the close combination of Ni3FeOOH and highly conductive NF support ensure the high catalytic OER activity.Therefore,the surface reconstruction and structural modification strategy can be used to design and prepare high-performance OER electrocatalysts for energy-related applications. | Liyuan Xiao Xue Bai Jingyi Han Tianmi Tang Siyu Chen Hui Qi Changmin Hou Fuquan Bai Zhenlu Wang Jingqi Guan | 2024 | Nano Research2024，17，4： | 0 |
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