检索结果-南通市图书馆

A strained π-extended[10]cycloparaphenylene carbon nanoring

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第5期35卷 171-174页

作者： Kang Wei Jiayu Li Wen Zhang Bing Yuan Ming-De Li pingwu du Key Laboratory of Precision and Intelligent Chemistry Anhui Laboratory of Advanced Photon Science and TechnologyDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063China

Herein,we report the facile synthesis of a highly strained hexabenzocoronene-containing carbon nanoring,cyclo[4]-paraphenylene[2]-2,11-hexabenzocoronenylene([4,2]CPHBC),as the segment of a[10,10]single-walled carbon nanotube([10,10]SWNT).[4,2]CPHBC was synthesized based on the platinummediated assembly of diborylbiphenyl and diborylhexabenzocoronene,forming a tetranuclear platinum complex,followed by reductive *** nanoring molecule was confirmed by NMR and HRMS,and its photophysical properties were studied using steady-state and time-resolved ***,the selective supramolecular host-guest interaction between[4,2]CPHBC and C_(60) was also investigated.

关键词： CPP Hexabenzocoronene Fullerene Supramolecular chemistry

Self-supported Ni2P nanosheets on low-cost three-dimensional Fe foam as a novel electrocatalyst for efficient water oxidation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第3期29卷 71-76页

作者： Mengrong Zhang Taotao Wang Hongyun Cao Shengsheng Cui pingwu du Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)University of Science and Technology of China(USTC)Hefei 230026AnhuiChina National Synchrotron Radiation Laboratory University of Science and Technology of China(USTC)Hefei 230029AnhuiChina

Electrochemical water splitting into hydrogen and oxygen is a promising strategy for future renewable energy conversion *** oxygen evolution reaction(OER)is considered as the bottleneck reaction in an overall water splitting system because it involves 4e- and 4H+ transfer ***,it is highly desirable to explore low-cost alternative catalysts for OER at ambient ***,we report for the first time that nickel phosphide(Ni2P)nanosheets can be facilely grown on Fe foam(FF)as an efficient electrocatalyst for OER with excellent durability and catalytic activity under alkaline *** reach a current density of 10 m A/cm2,the Ni2P-FF catalyst required a low overpotential of only 198 mV for *** catalyst’s high OER activity and durability were well maintained at a high current *** required overpotentials were only 267 and 313 mV to achieve the current densities of 100 and 300 m A/cm2,*** combination of low-cost Fe foam with Ni2P provides a promising low-cost catalyst for large-scale application of electrocatalytic water splitting.

关键词： Low-cost electrocatalyst Metal phosphide Fe foam Water oxidation

A molecular cobaloxime cocatalyst and ultrathin FeOOH nanolayers co-modifiedBiVO_(4) photoanode for efficient photoelectrochemical water oxidation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第6期31卷 497-505,I0014页

作者： Hongyun Cao Taotao Wang Jiaxing Li Jinbao Wu pingwu du Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)University of Science and Technology of ChinaHefei 230026AnhuiChina National Synchrotron Radiation Laboratory University of Science and Technology of China443 Huangshan RoadHefei 230029AnhuiChina

BiVO_(4) has been attracting a lot of interest in photoelectrochemical (PEC) water oxidation due to its efficient solar absorption and appropriate band *** far,sluggish water oxidation kinetics and fast photogenerated charge recombination still hinder the PEC performance ofBiVO_(4) .In this study,a novel PEC photoanode was designed by depositing ultrathin FeOOH nanolayers on the surface of nanoporousBiVO_(4) electrode,followed by modification with a cobaloxime (Co(dmgH)_(2)(4-COOH-py)Cl) molecular *** irradiation of a 100 mW cm^(-2)(AM 1.5G) Xe lamp,the photocurrent density of the cobaloxime/FeOOH/BiVO_(4) composite photoanode reached 5.1 mA cm^(-2)at 1.23 V *** in 1.0 M potassium borate buffer solution (pH=9.0).The onset potential of the optimal cobaloxime/FeOOH/BiVO_(4) photoanode exhibited a 460 m V cathodic shift relative to bareBiVO_(4) .In addition,the surface charge injection efficiency of the composite photoanode reached~80%at 1.23 V *** and the incident photon-to-current efficiency (IPCE) reached~88%at 420 nm.

关键词： BiVO_(4) Photoelectrochemical water oxidation Cobaloxime Charge injection efficiency Synergistic effect

Highly efficient and selective photocatalytic dehydrogenation of benzyl alcohol for simultaneous hydrogen and benzaldehyde production over Ni-decorated Zn_(0.5)Cd_(0.5)S solid solution

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2019年第3期28卷 71-77页

作者： Lei Zhang Daochuan Jiang Rana Muhammad Irfan Shan Tang Xin Chen pingwu du Hefei National Laboratory of Physical Science at the Microscale CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) University of Science and Technology of China (USTC)

Photocatalytic conversion of solar energy into hydrogen and high value-added fine chemicals has attracted increasing attention. Herein, we demonstrate an efficient photocatalytic system for simultaneous hydrogen evolution and benzaldehyde production by dehydrogenation of benzyl alcohol over Nidecorated Zn_(0.5)Cd_(0.5)S solid solution under visible light. The photocatalytic system shows an excellent hydrogen production rate of 666.3 μmol h^(-1) with high stability. The optimal apparent quantum yield of52.5% is obtained at 420 nm. This noble-metal-free photocatalytic system displays much higher activity than pure Zn_(0.5)Cd_(0.5)S and Pt-loaded Zn_(0.5)Cd_(0.5)S solid solution. Further studies reveal that the metallic Ni nanocrystals play an important role in accelerating the separation of photogenerated charge carriers and the subsequent cleavage of α-C–H bond during dehydrogenation of benzyl alcohol.

关键词： Photocatalysis Benzyl alcohol oxidation Hydrogen production Nickel Solid solution Charge separation

Nitrogen photofixation on holey g-C3N4 nanosheets with carbon vacancies under visible-light irradiation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第3期31卷 792-796页

作者： Jianhua Ge Long Zhang Jing Xu Yujie Liu Daochuan Jiang pingwu du School of Earth and Environment Anhui University of Science&TechnologyHuainan 232001China CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringCollaborative Innovation Center of Chemistry for Energy Materials(iChEM)University of Science and Technology of China(USTC)Hefei 230026China

Nitrogen photo fixation using g-C3N4-based photocatalysts have attracted abundant of attentions ***,in this study,holey g-C3N4(HGCN)nanosheets possess a good deal of carbon vacancies were prepared by means of thermally treating bulk g-C3 N4(BGCN)under an NH3 *** analysis revealed that the as-synthesized sample have identical crystal structure,la rger BET specific surface area,stronger reduction capability,and higher photogene rated charge carrier separation rate than that of *** properties may contribute to enhance the nitrogen photofixation *** was also found that the rate of NH4^+production for N2 photofixation of HGCN sample reached^25.54 mg L^-1 h^-1 g(cat)^-1,which is approximately^5.87 times higher than that of BGCN sample under optimal reactive ***,a plausible mechanism of HGCN for nitrogen photofixation process was illuminated in detail.

关键词： Nitrogen photofixation Carbon vacancies g-C3N4 Nanosheets Photocatalysis

Facile deposition of cobalt oxide based electrocatalyst on low-cost and tin-free electrode for water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2014年第2期23卷 179-184页

作者： Ali Han pingwu du Department of Materials Science and Engineering & Department of Chemistry & CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China

Facile deposition of a water-splitting catalyst on low-cost electrode materials could be attractive for hydrogen production from water and solar energy conversion. Herein we describe fast electrodeposition of cobalt-based water oxidation catalyst （Co-WOC） on simple graphite electrode for water splitting, The deposition process is quite fast, which reaches a plateau in less than 75 min and the final ctLrrent density is -1.8 mA/cm2 under the applied potential of 1.31 V at pH --7.0. The scanning electron microscopy （SEM） study shows the formation of nanometer-sized particles （10-100 nm） on the surface of the electrode after only 2 min and micrometer-sized particles （2-5/zm） after 90 rain of electrolysis. X-ray photoelectron spectroscopy （XPS） data demonstrate the as-synthesized ex-situ catalyst mainly contains Co2＋ and Co3＋ species incorporating a substantial amount of phosphate anions. These experiments suggest that cost-efficient cobalt oxide materials on graphite exhibit alluring ability for water splitting, which might provide a novel method to fabricate low-cost devices for electrochemical energy storage.

关键词： electrocatalyst water splitting water oxidation hydrogen production

Synthesis of an all-carbon conjugated polymeric segment of carbon nanotubes and its application for lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 10342-10347页

作者： Shengda Wang Fei Chen Guilin Zhuang Kang Wei Tianyun Chen Xinyu Zhang Chunhua Chen pingwu du Hefei National Research Center for Physical Sciences at the Microscale Anhui Laboratory of Advanced Photon Science and TechnologyCAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringiChEMUniversity of Science and Technology of ChinaHefei 230026China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310032China

The synthesis and potential applications of nanocarbon materials have attracted much attention in recent ***,we report the design and synthesis of a novel all-carbon conjugated polymeric segment of single-walled carbon nanotubes(poly(cyclo-para-phenylene)(PCPP))and its first application as an anode material for lithium-ion *** as-synthesized PCPP was characterized by Raman spectroscopy,Fourier transform infrared(FTIR),and other *** electrochemical characterization results show the suitability of PCPP as an anode material for lithium-ion *** calculations indicate the unique structural and physical properties of *** realization of PCPP expands the scope of bottom-up synthesis of uniform carbon nanotube segments and their potential applications as new materials for lithium-ion batteries.

关键词： carbon nanomaterials conjugated polymer carbon nanotubes lithium-ion batteries

Pomegranate-like C_(60)@cobalt/nitrogen-codoped porous carbon for high-performance oxygen reduction reaction and lithium-sulfur battery

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第8期14卷 2596-2605页

作者： Jianhua Wu Shiyang Wang Zhanwu Lei Runnan Guan Muqing Chen pingwu du Yalin Lu Ruiguo Cao Shangfeng Yang Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyDepartment of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Porous carbon materials play essential roles in electrocatalysis and electrochemical energy *** is of significant importance to rationally design and tune their porous structure and active sites for achieving high electrochemical activity and ***,we develop a novel approach to tune the morphology of porous carbon materials(PCM)by embedding fullerene C_(60),achieving improved performance of oxygen reduction reaction(ORR)and lithium-sulfur(Li-S)*** to the strong interaction between C_(60)and imidazole moieties,pomegranate-like hybrid of Ow-embedded zeolitic imidazolate framework(ZIF-67)precursor is synthesized,which is further pyrolyzed to form C_(60)-embedded cobalt/nitrogen-codoped porous carbon materials(abbreviated as C_(60)@Co-N-PCM).Remarkably,the unique structure of C_(60)@Co-N-PCM offers excellent ORR electrocatalytic activity and stability in alkaline solutions,outperforming the commercial Pt/C(20 wt.%)***,C_(60)@Co-N-PCM as a novel cathode delivers a high specific capacity of-900 mAh·g^(-1) at 0.2 C rate in Li-S batteries,which is superior to the pristine ZIF-67-derived PCM without embedding C_(60).

关键词： porous carbon materials fullerene zeolitic imidazolate framework(ZIF) oxygen reduction reaction(ORR) lithium-sulfur(Li-S)battery

Integrating noble-metal-free NiS cocatalyst with a semiconductor heterojunction composite for efficient photocatalytic H_2 production in water under visible light

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2017年第12期38卷 2102-2109页

作者： Daochuan Jiang Liang Zhu Rana Muhammad Irfan Lei Zhang pingwu du CAS Key Laboratory of Materials for Energy Conversion Hefei National Laboratory for Physical Sciences at Microscale Department of Materials Science and Engineering iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) University of Science and Technology of ChinaHefei 230

Photocatalytic water splitting is an economical and sustainable pathway to use solar energy for large‐scale *** report a highly efficient noble‐metal‐free photocatalyst formed by integrating amorphous NiS with a CdS nanorods(NRs)/ZnS heterojunction material for photocatalytic H2production in water under visible light irradiation(?>420nm).The results show that the photocatalytic H2production rate reaches an optimal value of up to574μmol·h–1after the loading of NiS,which is more than38times higher than the catalytic activity of pure CdS *** average apparent quantum yield is^43.2%during5h of irradiation by monochromatic420nm *** present study demonstrates the advantage of integration strategies to form not only semiconductor heterojunctions but also photocatalyst‐cocatalyst interfaces to enhance the catalytic activity for photocatalytic H2production.

关键词： Photocatalytic hydrogen evolution CdS/ZnS Heterojunction Nickel sulfide