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Selective oxidation mediated synthesis of unique SexTey nanotubes, their assembled thin films and photoconductivity

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Nano Research 2018年第2期11卷 665-675页

作者： Yuan Yang Guo-Qiang Liu min-rui gao Yu Xia Shu-Hong Yu Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Centre of Suzhou Nano Science and Technology CAS Centre for Excellence in Nanoscience Department of Chemistry Hefei Science Centre of CAS University of Science and Technology of China Hefei China

One-dimensional hollow nanostructures have potential applications in many fields and can be fabricated using various methods. Herein, a selective-oxidation route for the synthesis of unique SexTey nanotubes （STNTs） with a controlled morphology using TexSey@Se core-shell nanowires （TSSNWs） as a template is reported. Because of the lower redox potential of TeO2/Te compared to that of H2SeO3/Se, the Te in TSSNWs can be preferentially oxidized by an appropriate oxidant of HNO2 to form STNTs. The inner diameters and wall thicknesses of the STNTs can be tuned by modulating the core diameters and shell thicknesses of the TSSNWs, respectively. The STNTs can be assembled into a monolayer composed of well-arranged nanotubes using the Langmuir-Blodgett technique. A device based on films stacked with 10 STNT monolayers was fabricated to investigate the photocoductivity of the STNTs. The STNTs exhibited a good photoresponse over the whole ultraviolet-visible spectrum, revealing their votential for application in ovtoelectronic devices.

关键词： selective oxidation core-shell nanowires nanotubes assembled thin films photoconductivity

Unconventional dual-vacancies in nickel diselenide-graphene nanocomposite for high-efficiency oxygen evolution catalysis

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Nano Research 2020年第12期13卷 3292-3298页

作者： Pengkun Wei Zewei Hao Yang Yang mingyang Liu Haijun Zhang min-rui gao Shu-Hong Yu Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and EngineeringNankai UniversityTianjin300350China Department of Civil and Environmental Engineering Rice UniversityHoustonTexas77005USA Center for Aircraft Fire and Emergency Economics and Management CollegeCivil Aviation University of ChinaTianjin300300China Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceHefei Science Center of CASCollaborative Innovation Center of Suzhou Nano Science and TechnologyDepartment of ChemistryUniversity of Science and Technology of ChinaHefei230026China

Although nickel-based catalysts display good catalytic capability and excellent corrosion resistance under alkaline electrolytes for water splitting,it is still imperative to enhance their activity for real device ***,we decorated Ni0.85Se hollow nanospheres onto reduced graphene oxide(RGO)through a hydrothermal route,then annealed this composite at different temperatures(400℃,NiSe2-400 and 450℃,NiSe2-450)under argon atmosphere,yielding a kind of NiSe2/RGO composite *** annihilation spectra revealed two types of vacancies formed in this composite *** found that the NiSe2-400 catalyst with dual Ni-Se vacancies is able to catalyze the oxygen evolution reaction(OER)efficiently,needing a mere 241 mV overpotential at 10 mA·cm−*** addition,this catalyst exhibits outstanding *** studies show favorable energy barrier on NiSe2-400,enabling moderate OH−adsorption and O2 desorption,which leads to the enhanced energetics for OER.

关键词： hollow nanospheres NiSe2 oxygen evolution reaction dual-vacancies

Towards reliable assessment of hydrogen oxidation electrocatalysts for anion-exchange membrane fuel cells

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Nano Research 2023年第8期16卷 10787-10795页

作者： Fei-Yue gao Ye-Hua Wang Yu Yang Jie Liao Jing-Wen DuanMu Xiao-Long Zhang Zhuang-Zhuang Niu Peng-Peng Yang min-rui gao Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Recent advancement of proton exchange membrane fuel cells has led to commercial sales of fuel-cell cars but market barrier exists because this technology heavily relies on platinum *** the permission of adopting platinum-group-metal-free catalysts,anion-exchange membrane fuel cell has received notable ***,the sluggish kinetics of anodic hydrogen oxidation reaction(HOR)largely limit the cell *** many high-performance HOR catalysts have been reported,there are analytical uncertainties in the literature concerning the assessment of the catalyst *** we determine the origin of false HOR currents in the recorded polarization curves and propose a rigorous approach to eliminate *** unveil experimentally the uncertainties of obtaining exchange current densities(j0)using Tafel plot from Bulter–Volmer equation and recommend employing the micro-polarization region *** bulky catalysts that cannot establish a well-defined diffusion layer,we suggest applying external stirring bar to offer certain level of enforced convection and using j0 to compare the activity.

关键词： platinum group metal-free catalysts anion-exchange membrane fuel cell hydrogen oxidation reaction kinetic analysis

Synthesis of PdS_(x)- Mediated Polydymite Heteronanorods and Their Long-Range Activation for Enhanced Water Electroreduction

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Research 2019年第1期2019卷 686-696页

作者： Qiang gao rui Wu Yang Liu Ya-Rong Zheng Yi Li Li-Mei Shang Yi-ming Ju Chao Gu Xu-Sheng Zheng Jian-Wei Liu Jun-Fa Zhu min-rui gao Shu-Hong Yu Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceHefei Science Center of CASCollaborative Innovation Center of Suzhou Nano Science and TechnologyDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China Dalian National Laboratory for Clean Energy Dalian 116023China

Material interfaces permit electron transfer that modulates the electronic structure and surface properties of catalysts,leading to radically enhanced rates for many important *** conventional thoughts,the nanoscale interfacial interactions have been recently envisioned to be able to afect the reactivity of catalysts far from the ***,demonstration of such unlocalized alterations in existing interfacial materials is rare,impeding the development of new *** report the observation of unprecedented long-range activation of polydymite Ni_(3)S_(4) nanorods through the interfacial interaction created by PdS_(x) nanodots(dot-on-rod structure)for high-performance water catalytic *** results show that this local interaction can activate Ni3S4 rods with length even up to 25 nanometers due to the tailored surface electronic *** anticipate that the long-range efect described here may be also applicable to other interfacial material systems,which will aid the development of newly advanced catalysts for modern energy devices.

关键词： structure interfacial interaction

Low-temperature Catalytic Reduction of Nitrogen Monoxide with Carbon Monoxide on Copper Iron and Copper Cobalt Composite Oxides

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Chinese Journal of Chemical Physics 2008年第4期21卷 393-400页

作者： Jun-sheng Shu Wen-shui Xia You-jin Zhang Tao Cheng min-rui gao School of Food Science and Technology Southern Yantze University Wuxi 214122 China Department of Chemistry University of Science and Technology of China Hefei 230025 China

Copper iron composite oxides （CuO/Fe2O3） and copper cobalt composite oxides （CuO/Co3O4） for the catalytic reduction of NO with CO at low temperature were prepared by co-precipitation. The catalytic activity and thermal stability of the catalysts were evaluated by a microreactor-GC system. The 100% conversion temperatures of NO are 80 ℃ for CuO/Fe2O3 and 90 ℃ for CuO/Co3O4. The catalysts possess high catalytic activity and favorable thermal stability for NO reduction with CO in a wide temperature range and long time range. A systematic study of the molar ratios of the reactants, the volume of NaOH, aging time, and calcination temperature/time was carried out to investigate the influence preparation conditions on the catalytic activity of the catalysts.

关键词： CuO/Fe2O3 CUO/Co3O4 NO reduction Catalytic activity Thermal stability

Modular divergent creation of dual-cocatalysts integrated semiconducting sulfide nanotriads for enhanced photocatalytic hydrogen evolution

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Nano Research 2023年第5期16卷 7967-7973页

作者： Chao Gu Yu-Qing Liu Guo-Qiang Liu Hou-ming Xu Yi Li Xiao-Long Zhang Liang Wu Lei Shi Shi-Kui Han min-rui gao Shu-Hong Yu Department of Chemistry Institute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleInstitute of EnergyHefei Comprehensive National Science CenterUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China

Heteronanostructures(HNs)with precise components and interfaces are important for many applications,such as designing efficient and robust solar-to-fuel catalysts via integrating specific semiconductors with favorable band ***,rationally endowing such features with rigorous framework control remains a synthetic ***,we report a modular divergent creation of dual-cocatalysts integrated semiconducting sulfide nanotriads(NTds),comprising both isolated Pd_(x)S oxidation(ox)and MoS_(2) reduction(red)domains within each single CdS counterpart,which exhibit superior photocatalytic activity and stability for hydrogen evolution reaction(HER).The stepwise constructed Pd_(x)S_((ox))−CdS−MoS_(2(red)) NTds possess dualinterfaces facilitating continuous charge separation and segregated active sites accelerating redox reactions,respectively,achieving the HER rate up to 9 mmol·h^(−1)·g^(−1),which is about 60 times higher than that of bare CdS,and show no evidence of deactivation after long-term *** design principle and transformation protocol provide predictable retrosynthetic pathways to HNs with increased degree of complexity and more elaborate functionalities that are otherwise inaccessible.

关键词： heteronanostructures colloidal synthesis semiconducting sulfides photocatalytic hydrogen evolution reaction

Investigation and Mitigation of Carbon Deposition over Copper Catalyst during Electrochemical CO_(2)Reduction

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Precision Chemistry 2024年第4期2卷 151-160页

作者： Jing-Wen DuanMu Zhi-Zheng Wu Fei-Yue gao Peng-Peng Yang Zhuang-Zhuang Niu Yu-Cai Zhang Li-Ping Chi min-rui gao Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China

Copper(Cu)is considered to be the most effective catalyst for electrochemical conversion of carbon dioxide(CO_(2))into value-added hydrocarbons,but its stability still faces considerable ***,we report the poisoning effect of carbon deposition during CO_(2)reduction on the active sites of Cu electrodea critical deactivation factor that is often *** find that,*C,an intermediate toward methane formation,could desorb on the electrode surface to form carbon *** reveal a strong correlation between the formation of methane and the carbon deposition,and the reaction conditions favoring methane production result in more carbon *** deposited carbon blocks the active sites and consequently causes rapid deterioration of the catalytic *** further demonstrate that the carbon deposition can be mitigated by increasing the roughness of the electrode and increasing the pH of the *** work offers a new guidance for designing more stable catalysts for CO_(2)reduction.

关键词： carbon deposition roughness in situ spectrum CO_(2)electroreduction copper catalyst

Phase-Controlled 1T Transition-Metal Dichalcogenide-Based Multidimensional Hybrid Nanostructures

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CCS Chemistry 2021年第11期3卷 58-68页

作者： Hou-ming Xu Chao Gu Xiao-Long Zhang Lei Shi Qiang gao Shaojin Hu Shi-Kui Han Xiao Zheng min-rui gao Shu-Hong Yu Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009 Hefei National Laboratory for Physical Sciences at the Microscale Division of Nanomaterials and ChemistryDepartment of ChemistryCAS Centre for Excellence in NanoscienceHefei Science Centre of CASHefei Comprehensive National Science CentreInstitute of EnergyUniversity of Science and Technology of ChinaHefei 230026 Hefei National Laboratory for Physical Sciences at the Microscale Division of Theoretical and Computational SciencesCAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026

Metallic-phase transition-metal dichalcogenides(TMDCs)exhibit unusual physicochemical properties compared with their semiconducting ***,they are thermodynamically unstable to access and it is even more challenging to construct their metastable-phase ***,we demonstrate a general solution protocol for phase-controlled synthesis of distorted octahedral 1T WS2-based(1T structure denotes an octahedral coordination for W atom)multidimensional hybrid nanostructures from two-dimensional(2D),one-dimensional(1D),and zero-dimensional(0D)*** is realized by tuning the reactivity of tungsten precursor and the interaction between crystal surface and *** a conceptual study on crystal phase-and dimensionality-dependent applications,we find that the three-dimensional(3D)hierarchical architectures achieved,comprising 1T WS2 and 2D Ni3S4,are very active and stable for catalyzing hydrogen *** results open up a new way to rationally design phase-controlled nanostructures with increased complexity and more elaborate functionalities.

关键词： wet-chemical synthesis phase transitionmetal dichalcogenides hybrid nanostructures hydrogen evolution

电催化CO_(2)还原的稳定性问题:评论性综述

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Science China Materials 2024年第6期67卷 1721-1739页

作者：端木静雯高飞跃高敏锐 Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

电催化二氧化碳还原反应(CO_(2)RR)能够利用可再生电能将CO_(2)转化为高附加值化学品和燃料,是一项有望缓解当下环境挑战的技术方案.本文总结了CO_(2)RR稳足性下降的根本原因,并探讨了解决这一问题的有效策略以及最新的研究进展.首先,... 详细信息

电催化二氧化碳还原反应(CO_(2)RR)能够利用可再生电能将CO_(2)转化为高附加值化学品和燃料,是一项有望缓解当下环境挑战的技术方案.本文总结了CO_(2)RR稳足性下降的根本原因,并探讨了解决这一问题的有效策略以及最新的研究进展.首先,在外加电位的作用下,催化剂会发生结构转变,且碳沉积或气体杂质引起的催化剂中毒都会降低CO_(2)RR的稳定性.其次,气体扩散层(GDL)附近发生水淹和盐沉淀会阻碍反应物/生成物的传输,三相界面会受到破坏.在长时间服役时,液压和电流的作用会导致GDL开裂.在电解质方面,碱性电解质会与CO_(2)中和,形成碳酸盐沉淀;而酸性介质腐蚀催化剂,并伴随严重的析氢副反应.另外,电解质中的金属离子杂质的优先还原进一步加剧了稳定性的衰减.深入理解CO_(2)RR中各类失活现象对设计稳定、高效的CO_(2)电催化系统具有指导意义.针对CO_(2)RR稳定性研究目前所面临的困境,本文最后展望了该领域未来的研究方向.

关键词： CO_(2)reduction stability catalyst gas diffusion layer electrolyte