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Bifunctional hierarchical NiCoP@FeNi LDH nanosheet array electrocatalyst for industrial-scale high-current-density water splitting

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Journal of Materials Science & Technology 2023年第28期159卷 33-40页

作者： Liming Yang Tao Yang Enhui Wang Xiangtao Yu Kang Wang Zhentao Du Sheng Cao Kuo-Chih Chou Xinmei Hou Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China MOE Key laboratory of New Processing Technology for non-ferrous metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China

Aiming to design and prepare non-noble metal electrocatalysts for hydrogen production at high current density(HCD),NiCoP@FeNi LDH hierarchical nanosheets were deposited on nickel foam progressively us-ing a hydrothermal-phosphorization-electrodeposition *** hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),NiCoP@FeNi LDH/NF requires only 195 and 230 mV overpotentials to reach 1000 mA cm−2,*** overall water splitting,only 1.70 V is required at 1000 mA cm−*** is the largest value for non-noble metal-based electrocatalysts reported so far at *** hierarchi-cal structure exhibits good electron transport capability and the porous-macroporous structure enhances the gas release rate,resulting in enhanced hydrogen production at ***,the synergistic effect of NiCoP and FeNi LDH contributes to the adsorption-desorption equilibrium of intermediate radicals dur-ing the reaction process and ultimately enhances the catalytic *** work provides useful direction for industrial-scale hydrogen production applications at HCD.

关键词： High-current-density Overall water splitting Hydrogen evolution reaction Oxygen evolution reaction

Investigation of anti-corrosion property of hybrid coatings fabricated by combining PEC with MAO on pure magnesium

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Journal of Magnesium and Alloys 2022年第10期10卷 2875-2888页

作者： Le Sun Ying Ma Binfeng Fan Sheng Wang Zhanying Wang State Key laboratory of Advanced Processing and Recycling of non-ferrous metals Lanzhou University of TechnologyLanzhou 730050China

Novel hybrid coatings on pure magnesium were prepared by combining plasma electrolytic carburizing(PEC)with micro-arc oxidation(MAO)to further enhance the anti-corrosion property in this *** electron microscopy(SEM)was used to observe the microstructure of the coatings,meanwhile,energy dispersive spectrometry(EDS)and X-ray diffraction(XRD)were separately used to investigate the elemental as well as phase compositions of the *** anti-corrosion property of the coatings was evaluated by potentiodynamic polarization curves as well as electrochemical impedance spectroscopy(EIS).The results show that PEC process is closely related with the effects of adsorption as well as diffusion of the activated carbon atoms,and it can provide a favorable pretreatment surface with predesigned chemical composition to obtain a new kind of phase,namely Si C with superior corrosion resistance and chemical stability,in the following PEC+MAO hybrid ***,PEC preprocessing also can afford an excellent micro-structure to increase the coating thickness as well as to improve the compactness of the PEC+MAO hybrid *** the fabrication process of the PEC+MAO hybrid coatings,an overlapping phenomenon in regard to coating thickness can be observed instead of heaping up layer by *** with both single PEC surface modification layers as well as single MAO coatings,the PEC+MAO hybrid coatings exhibit more superior anti-corrosion ***,the EIS data reveal that the PEC+MAO hybrid coatings can act as an effective protection system to provide relatively excellent long-range anti-corrosion *** also that employing same MAO technique for both single MAO treatment as well as PEC+MAO combining procedure is the key to this research.

关键词： Pure magnesium Plasma electrolytic carburizing Micro-arc oxidation Surface modification layers Hybrid coatings Anti-corrosion property

Perovskite fluoride NaNiF_(3) with hollow micron sphere structure as anode for Li-ion hybrid capacitors

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Rare metals 2022年第10期41卷 3370-3380页

作者： Ai-Jun Jiao Jian-Fei Gao Zheng-Hua He Jing-Feng Hou Ling-Bin Kong State Key laboratory of Advanced Processing and Recycling of non-ferrous metals Lanzhou University of TechnologyLanzhou730050China

Lithium-ion hybrid capacitors(LIHCs) are gaining more attention and applications because they break the performance limitations of supercapacitors(SCs) and lithium-ion batteries(LIBs).However,the difference of energy storage mechanism between anode and cathode is a problem that must be faced by Li-ion hybrid *** selection of suitable anode and cathode materials is one of the effective ways to solve this ***,we synthesized hollow spherical perovskite fluoride NaNiF3 by a simple and safe *** specific capacity of NaNiF3 is 142 mAh·g^(-1) at 0.1 A·g^(-1) for 1000 *** mechanism in the cycling of NaNiF3 electrodes was investigated using ex situ X-ray photoelectron spectroscopy(XPS),which is typical of the conversion ***,the NaNiF_(3)//activated carbon(AC) Li-ion hybrid capacitor assembled and showed better energy density(69 Wh·kg^(-1)) and power density(5699 W·kg^(-1)).Its capacity retention after long cycling was 79%.The use of NaNiF3 expands the choice of electrode materials for LIHCs and extends their practical applications.

关键词： Perovskite fluoride Anode Conversion mechanism Li-ion hybrid capacitor

Unraveling the Effect of Cation Types on Electrochromic Properties of Titanium Dioxide Nanocrystals

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Energy Material Advances 2022年第1期2022卷 147-156页

作者： Yi Liang Sheng Cao Yuwei Liu Lijuan He Xinxin Han Ruosheng Zeng Jialong Zhao Bingsuo Zou MOE Key laboratory of New Processing Technology for non-ferrous metals and Materials And Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Electrochromic(EC)devices have been regarded as promising candidates for energy-saving smart windows,next-generation displays,and wearable *** ions such as H^(+)-and Li^(+)-based electrolytes are the benchmark insertion ions for EC devices but have serious limitations such as high cost,instability,and difficulty to *** multivalent electrolytes is an effective alternative way to prepare high-performance EC devices;unfortunately,the related reports are currently limited to tungsten oxide EC ***,for the first time,we investigate the EC properties driven by different valence cationic(i.e.,Li^(+),Zn^(2+),and Al^(3+))electrolytes in the titanium dioxide *** is found that the initial optical modulation ranges of TiO_(2)nanocrystal(NC)films in Li^(+),Zn^(2+),and Al^(3+)electrolytes are 76.8%,77.4%,and 77.3%,*** 250 cycles,the optical contrast of these films in Zn^(2+)electrolyte decreased by only 2.3%,much lower than that in benchmark Li^(+)electrolyte of 10.1%and Al^(3+)electrolyte of 59.1%.Density functional theory calculation indicates that the potential barriers of Li^(+),Zn^(2+),and Al^(3+)in TiO_(2)are 0.59,0.55,and 0.74 eV,respectively,which makes TiO_(2)NCs show good EC properties in Zn^(2+)*** work unravels the effect of different valence cations on the electrochromic properties of titanium dioxide NCs,which may provide some new directions for the development of excellent EC devices with long-term stability and durability.

关键词： electrolyte titanium Titanium

Highly efficient green InP-based quantum dot light-emitting diodes regulated by inner alloyed shell component

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Light(Science & Applications) 2022年第7期11卷 1454-1463页

作者： Peng Yu Sheng Cao Yuliang Shan Yuhe Bi Yaqi Hu Ruosheng Zeng Bingsuo Zou Yunjun Wang Jialong Zhao School of Physical Science and Technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Suzhou Xingshuo Nanotech Co. Ltd.(Mesolight)Suzhou 215123China

InP-based quantum dot light-emitting diodes(QLEDs),as less toxic than Cd-free and Pb-free optoelectronic devices,have become the most promising benign alternatives for the next generation lighting and ***,the development of green-emitting InP-based QLEDs still remains a great challenge to the environmental preparation of InP quantum dots(QDs)and superior device ***,we reported the highly efficient green-emitting InP-based QLEDs regulated by the inner alloyed shell *** on the environmental phosphorus tris(dimethylamino)phosphine((DMA)3P),we obtained highly efficient InP-based QDs with the narrowest full width at half maximum(~35 nm)and highest quantum yield(~97%)by inserting the gradient inner shell layer ZnSe_(x)S_(1-x)without further *** importantly,we concretely discussed the effect and physical mechanism of ZnSe_(x)S_(1-x)layer on the performance of QDs and QLEDs through the characterization of structure,luminescence,femtosecond transient absorption,and ultraviolet photoelectron *** demonstrated that the insert inner alloyed shell ZnSe_(x)S_(1-x)provided bifunctionality,which diminished the interface defects upon balancing the lattice mismatch and tailored the energy levels of InP-based QDs which could promote the balanced carrier *** resulting QLEDs applying the InP/ZnSe_(0.7)S_(0.3)/ZnS QDs as an emitter layer exhibited a maximum external quantum efficiency of 15.2%with the electroluminescence peak of 532 nm,which was almost the highest record of InP-based pure green-emitting *** results demonstrated the applicability and processability of inner shell component engineering in the preparation of high-quallity InP-based QLEDs.

关键词： diodes quantum component

Interface optimization and defects suppression via Na F introduction enable efficient flexible Sb_(2)Se_(3) thin-film solar cells

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Journal of Energy Chemistry 2024年第3期90卷 165-175,I0006页

作者： Mingdong Chen Muhammad Ishaq Donglou Ren Hongli Ma Zhenghua Su Ping Fan David Le Coq Xianghua Zhang Guangxing Liang Shuo Chen Shenzhen Key laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina State Key laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004GuangxiChina CNRS ISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Universitéde RennesRennes F-35000France

Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tolerance,demonstrating great application potential in flexible ***,the power conversion efficiency(PCE) of flexible Sb_(2)Se_(3) photovoltaic devices is temporarily limited by the complicated intrinsic defects and the undesirable contact ***,a high-quality Sb_(2)Se_(3) absorber layer with large crystal grains and benign [hkl] growth orientation can be first prepared on a Mo foil *** NaF intermediate layer is introduced between Mo and Sb_(2)Se_(3),which can further optimize the growth of Sb_(2)Se_(3)thin ***,positive Na ion diffusion enables it to dramatically lower barrier height at the back contact interface and passivate harmful defects at both bulk and *** a result,the champion substrate structured Mo-foil/Mo/NaF/Sb_(2)Se_(3)/CdS/ITO/Ag flexible thin-film solar cell delivers an obviously higher efficiency of 8.03% and a record open-circuit voltage(V_(OC)) of 0.492 *** flexible Sb_(2)Se_(3) device also exhibits excellent stability and flexibility to stand large bending radius and multiple bending times,as well as superior weak light photo-response with derived efficiency of 12.60%.This work presents an effective strategy to enhance the flexible Sb_(2)Se_(3) device performance and expand its potential photovoltaic applications.

关键词： Sb_(2)Se_(3) Flexible solar cells NaF intermediate layer Interface optimization Defects suppression

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氧化镍和硫化铜矿联合熔炼炉渣的黏度

Transactions of nonferrous metals Society of China 2023年第10期33卷 3168-3184页

作者： Alexander KLYUSHNIKOV Svetlana SERGEEVA Roza GULYAEVA Alexander VUSIKHIS Lyudmila UDOEVA Stanislav TYUSHNYAKOV laboratory of non-ferrous metals pyrometallurgy Department of Non-Ferrous MetalsInstitute of Metallurgy of the Ural Branch of the Russian Academy of Sciences101Amundsen StreetYekaterinburg 620016Russia laboratory of Rare Refractory metals Department of Non-Ferrous MetalsInstitute of Metallurgy of the Ural Branch of the Russian Academy of Sciences101Amundsen StreetYekaterinburg 620016Russia

测定氧化镍和硫化铜矿联合冶炼熔渣的黏度。制备的模拟熔渣与实际熔渣的成分和结构相似,并限制研究的熔渣的成分范围,含铁熔渣的成分(质量分数)为:8.9%CaO、11.8%MgO、12.5%Al_(2)O_(3)、47.4%SiO_(2)、13.3%FeO和5.0%Fe_(2)O_(3);无铁... 详细信息

测定氧化镍和硫化铜矿联合冶炼熔渣的黏度。制备的模拟熔渣与实际熔渣的成分和结构相似,并限制研究的熔渣的成分范围,含铁熔渣的成分(质量分数)为:8.9%CaO、11.8%MgO、12.5%Al_(2)O_(3)、47.4%SiO_(2)、13.3%FeO和5.0%Fe_(2)O_(3);无铁熔渣是将含铁熔渣中的氧化铁去除得到,其成分(质量分数)为:12.5%CaO、16.0%MgO、9.4%Al_(2)O_(3)和58.3%SiO_(2)。由振动法测试的含铁熔渣(1550~1300℃)和无铁熔渣(1550~1400℃)的黏度实验值分别为0.31~2.33 Pa·s和1.28~4.55 Pa·s。由Kalmanovitch-Frank模型预测的含铁熔渣的黏度值与实验值存在偏差。通过Weimann-Frenkel-Urbain方程对实验数据进行回归分析,提出可预测所考虑温度范围内的初级熔渣黏度的原始经验模型。当碱度从0.7(含铁熔渣)降低到0.6(无铁熔渣),黏性流动活化能从204 kJ/mol增加到236kJ/mol。为了保持最佳熔渣黏度,氧化镍和硫化铜矿联合冶炼的温度应不低于1400℃。

关键词：熔渣黏度振动式黏度计 Kalmanovitch–Frank模型 Weimann–Frenkel–Urbain方程氧化镍矿硫化铜矿造锍熔炼

Bioabsorbable fabrication of molybdenum nitride/carbon nanocomposites for supercapacitors and metal ion batteries with robust stability

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Rare metals 2023年第12期42卷 4212-4225页

作者： Qiang-Hong Wu Huan-Zhong Zeng You-Zhi Wu Fen Ran State Key laboratory of Advanced Processing and Recycling of non-ferrous metals School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China

Metal nitride is one of the best anode materials of the energy storage device;however,the low stability of the pure metal nitride limits its wide *** this work,a new method of bioabsorbable fabrication was developed for preparing molybdenum nitride that corporates into the porous carbon *** molybdenum ions in pollutions could be easily absorbed by Ligustrum quihoui,and the transportation,accumulation,and circulation of molybdenum ions in Ligustrum quihoui were *** obtained composite material of biochar and molybdenum nitride is employed as anode material of supercapacitors and batteries which exhibits good electrochemical performance,especially the rate and long lifespan ***,it is found that the specific capacity is344 F·g^(-1)at current density of 0.5 A·g^(-1)in 2 mol·L^(-1)KOH,and the capacitance retention and coulomb efficiency are above 90%after 10,000 *** should be noted that the novel approach combines fabricating anode materials with advanced nanostructure and suppressing the environmental problems with metal pollution at the same time.

关键词： Metal pollution Ligustrum quihoui Supercapacitors Metal ions batteries Anode materials

Boosting electroluminescence performance of all solution processed In P based quantum dot light emitting diodes using bilayered inorganic hole injection layers

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Photonics Research 2022年第9期10卷 2133-2139页

作者： QIUYAN LI SHENG CAO PENG YU MEIJING NING KE XING ZHENTAO DU BINGSUO ZOU JIALONG ZHAO School of Physical Science and Technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi UniversityNanning 530004China

The development of high-performance In P-based quantum dot light-emitting diodes(QLEDs)has become the current trend in ecofriendly display and lighting ***,compared with Cd-based QLEDs that have already been devoted to industry,the efficiency and stability of In P-based QLEDs still face great *** this work,colloidal Ni Oxand Mg-doped Ni Oxnanocrystals were used to prepare a bilayered hole injection layer(HIL)to replace the classical polystyrene sulfonate(PEDOT:PSS)HIL to construct high-performance In Pbased *** with QLEDs with a single HIL of PEDOT:PSS,the bilayered HIL enables the external quantum efficiencies of the QLEDs to increase from 7.6%to 11.2%,and the T_(95)lifetime(time that the device brightness decreases to 95%of its initial value)under a high brightness of 1000 cd m^(-2)to prolong about 7 *** improved performance of QLEDs is attributed to the bilayered HIL reducing the mismatched potential barrier of hole injection,narrows the potential barrier difference of indium tin oxide(ITO)/hole transport layer interface to promote carrier balance injection,and realizes high-efficiency radiative *** experimental results indicate that the use of bilayered HILs with p-type Ni Oxmight be an efficient method for fabricating high-performance In P-based QLEDs.

关键词： diodes injection performance