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5篇 您的检索式:作者名="Pengfang Zhang"
    题名 作者 年代 出处 被引量
1Morphology-selective synthesis of active and durable gold catalysts with high catalytic performance in the reduction of 4-nitrophenol显示文摘由 nanosized Au 粒子组成的一系列新奇催化剂与血小板(PL ) 在 micro-mesoporous ZSM-5/SBA-15 (ZSBA ) 材料限制了,杆(RD ) ,并且六角形棱柱(HP ) 形态学在 situ 被综合了。这些催化剂拥有 SBA-15 和 ZSM-5 结构并且在 ZSBA 以内由 Au nanoparticles (NP ) 的监禁展出他们的活跃地点的优秀稳定性。催化剂深入地被描绘了理解他们的结构性质关系。金 NP 尺寸和催化剂的毛孔结构,被发现对锻烧温度和合成条件敏感,被显示在 4-nitrophenol 的减小起重要作用。与短 mesochannels (210 nm ) 和一条大毛孔直径(6.7 nm ) ,而与长 mesochannels 和相对更小的毛孔尺寸, Au/ZSBA-HP 和 Au/ZSBA-RD 给穷人看催化活动, Au/ZSBA-PL 在 4-nitrophenol 的减小展出高催化的性能。在有不同金 NP 尺寸的催化剂的情况中,有 4.0 nm 的一条 Au NP 直径的 Au/ZSBA-PL-350 展出最高的反应率常数(0.14 min -1) 和周转频率(0.0341 s -1) 。另外, 4-nitrophenol 的减小上的反应参数的效果系统地被调查了。为在 Au/ZSBA 催化剂上的 4-nitrophenol 减小的可能的机制被建议。Daowei Gao Xin Zhang Xiaoping Dai Yuchen Qin Aijun Duan Yanbing Yu Hongying Zhuo Hairui Zhao Pengfang Zhang Yan Jiang Jianmei Li Zhen Zhao 2016Nano Research2016,9,10:4
2A single Au nanoparticle anchored inside the porous shell of periodic mesoporous organosilica hollow spheres显示文摘理想的金属催化剂对沥滤或粒子凝块与反应试剂,很多暴露的活跃地点,和高稳定性要求容易的接触。抛锚尽管几乎没报导,在多孔的壳内的一个金属核心可以由于常规支持的金属安排的集成把这些优点合为 core@void@shell 体系结构。然而,完成这由于弱 coreshell 亲密关系是极其困难的。此处,第一次,我们报导一条途径由增加核心壳相互作用克服这挑战。在这方面,我们综合了一个单个 Au 核心是的新奇 Au@void@periodic mesoporous organosilica (PMO ) 在体系结构坚定地在空 PMO 范围的多孔的壳内抛锚了。在之间的非共有原子价相互作用(vinylpyrrolidone )(PVP ) poly,一些 functionalized Au 和 PMO 的乙烷一半向多孔的壳便于 Au 核心的运动在期间 Au@SiO2@PMO 的选择碱的蚀刻。抛锚壳的 Au 核心以与活跃地点的试剂和暴露的接触比在常规 Au@void@PMO 的推迟的核心优异,并且因此为 4-nitrophenol 减小显示出更高催化的效率。这里表明的方法论提供新卓见因为有核心的万用的多功能的 nanostructures 的制造在空壳内抛锚了。Ying Yang Wen Zhang Ying Zhang Anmin Zheng Hui Sun Xinsong Li Suyan Liu Pengfang Zhang Xin Zhang 2015Nano Research2015,8,10:3
3Long-range Pt-Ni dual sites boost hydrogen evolution through optimizing the adsorption configuration显示文摘Elaborated design of catalytic systems with a specifically tailored site distance to match the intermediates could substantially improve reaction kinetics and boost catalytic activity under unfavorable reaction conditions.Considering the lower energy barriers of water splitting upon the synergy of dual sites,constructing synergistic Pt-M(M:transition metal)dual sites is an effective way to boost Pt with highly catalytic hydrogen evolution reaction(HER)performance.An unconventional“Ni(OH)_(2)-coated high-index Pt facets”was constructed to obtain long-range Pt-Ni dual sites,in which Ni composition as a water dissociation synergistic site can protect Pt from electrolyte corrosion and ensure efficient proton donation to Pt sites.The obtained long-range Pt-Ni dual sites present 3.84 mA·cm^(-1) of current density,which is 7.5 times specific activity higher than that of commercial Pt/C towards alkaline HER.The enhanced HER performance is attributed to synergistic catalysis on Pt-Ni dual sites accompanied by unconventional electron coupling.This work illustrates a new strategy to construct the long-range dual sites by unconventional strategy for fundamental electrocatalytic study of alkaline HER.Cong Liu Pengfang Zhang Bing Liu Qian Meng Xuzhao Yang Yakun Li Jingli Han Yao Wang 2024Nano Research2024,17,5:0
4Dependence of lithium metal battery performances on inherent separator porous structure regulation显示文摘Boosting of rechargeable lithium metal batteries(LMBs) holds challenges because of lithium dendrites germination and high-reactive surface feature.Separators may experience structure-determined chemical deterioration and worsen Li plating-stripping behaviors when smoothly shifting from lithium-ion batteries(LIBs) to LMBs.This study precisely regulations the crystal structure of β-polypropylene and separator porous construction to investigate the intrinsic porous structure and mechanical properties determined electrochemical performances and cycling durability of LMBs.Crystal structure characterizations,porous structure analyses,and electrochemical cycling tests uncover appropriate annealing thermal stimulation concentrates β-lamellae thickness and enhances lamellae thermal stability by rearranging molecular chain in inferior β-lamellae,maximally homogenizing biaxial tensile deformation and resultant porous constructions.These even pores with high connectivity lower ion migration barriers,alleviate heterogeneous Li^(+) flux dispersion,stabilize reversible Li plating-stripping behaviors,and hinder coursing and branching of Li dendrites,endowing steady cell cycling durability,especially at higher currents due to the highlighted uncontrollable cumulation of dead Li,which offers new insights for the current pursuit of high-power density battery and fast charging technology.The suggested separator structure-chemical nature functions in ensuring cyclic cell stability and builds reliable relationships between separator structure design and practical LMBs applications.Lei Ding Dandan Li Lingyang Liu Pengfang Zhang Fanghui Du Chao Wang Daoxin Zhang Shuo Zhang Sihang Zhang Feng Yang 2023Journal of Energy Chemistry2023,,9:0
5Enhancement of CH_(3)CO^(*) adsorption by editing d-orbital states of Pd to boost C–C bond cleavage of ethanol eletrooxidation显示文摘Improving the complete ethanol electrooxidation on Pd-based catalysts in alkaline media has drawn widely attention due to the high mass energy density.However,the weak adsorption energy of CH_(3)CO^(*) on Pd restricts the C–C bond cleavage.Inspired by the molecular orbital theory,we proposed the d-state-editing strategy to construct more unoccupied d-states of Pd for the enhanced interaction with CH_(3)CO^(*) to break C–C bonds.As expected,the reduced number of e_g electrons and more unoccupied d-states of Pd successfully formed on as-prepared porous Rh Au–Pd Cu nanosheets(PNSs).Theoretical calculations show that the optimized d-states of Rh Au–Pd Cu PNS can effectively improve the adsorption of CH_(3)CO^(*) and drastically reduce the energy barrier of C–C bond cleavage,thus boosting the complete oxidation of ethanol.The charge ratio of C_1 pathway on Rh Au–Pd Cu PNSs is 51.5%,more than 2 times higher than that of Pd NSs.Our finding provides an innovative perspective for the design of highly-efficient noble-based electrocatalysts.Yuchen Qin Fengqi Wang Pei Liu Jinyu Ye Qian Wang Yao Wang Guangce Jiang Lijie Liu Pengfang Zhang Xiaobiao Liu Xin Zheng Yunlai Ren Junjun Li Zhicheng Zhang 2024Science China Chemistry2024,67,2:0
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