APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Lifang Gao,Zhenbang Liu,Jinling Ma,Lijie Zhong,Zhongqian Song,Jianan Xu,Shiyu Gan,Dongxue Han,Li Niu
A key challenge for the conversion of 5-hydroxymethylfurfural (HMF) into value-added 2,5-furandicarboxylic acid (FDCA) is improving the sluggish kinetics of selective oxidation alcohol groups. Electrocatalysis has been proved to be a green and efficient strategy for heterogeneous synthetic chemistry. Herein, we report an electrocatalyst of NiSe@NiO x core-shell nanowires for efficiently upgrading HMF into FDCA. The NiSe@NiO x features conductive NiSe nanowires as a core and active NiO x as a shell, showing a smaller Tafel slope of 23 mV dec −1 accompanying with a near-quantitative yield of FDCA and 99% Faradaic efficiency (FE). X-ray photoelectron spectroscopy unveils the high valence of Ni species in the NiO x shell may be the active sites. Further integrated electrolyzer can produce FDCA and hydrogen simultaneously, showing a 100% FE even after six successive cycles, disclosing robust stability. All these results demonstrate NiSe@NiO x core-shell nanowires as a promising robust non-precious electrocatalyst for highly efficient biomass transformation.
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Journal of Materials Chemistry C
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2022
·Vol. 10
·期 47
·18052-18062
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IF 8.067
Yayun Zheng,Xirui Kong,Lang He,Yi Song,Yan Zhao
A facile solid-state Matryoshka doll-like microwave strategy is developed to synthesize composites of NixSey and nitrogen-doped porous carbon (N–C). The crystal structures and morphology of NixSey/N–C are investigated with different feeding mass ratios of Ni/Se and at different microwave processing times. Thereinto, NiSe2/N–C is rapidly prepared in just 20 minutes. The physical–chemical properties of NiSe2/N–C are further investigated and the composite has shown good ion/electron transfer kinetics and structural stability for sodium storage. When employed as the anode of sodium ion batteries (SIBs), NiSe2/N–C shows a high reversible capacity of 374.4 mA h g−1 at 0.2 A g−1 and excellent cycling stability, retaining 95% of its initial capacity at 1.0 A g−1 after 2000 cycles. The good electrochemical performance is attributed to the synergistic effect between the highly active NiSe2 nanoparticles and the 3D conductive N–C frameworks, which expedites the charge-transfer rate and improves the reversibility of the charging/discharging reactions. The excellent Na+ storage kinetics of the NiSe2/N–C electrode results from its low adsorption energy of −0.94 eV and low energy barrier of 0.818 eV. This work provides a feasible microwave synthetic strategy to fabricate SIB electrode materials.
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ADVANCED MATERIALS
·
2022
·Vol. 35
·期 6
·2208615
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IF 32.086
Yihui Li,Xingfang Dong,Zewen Xu,Menglei Wang,Ruofei Wang,Juan Xie,Yangjian Ding,Pengcheng Su,Chengying Jiang,Xingmin Zhang,Liyu Wei,Jing-Feng Li,Zhaoqiang Chu,Jingyu Sun,Cheng Huang
Transition metal dichalcogenides (TMDs) are regarded as promising cathode materials for zinc-ion storage owing to their large interlayer spacings. However, their capabilities are still limited by sluggish kinetics and inferior conductivities. In this study, a facile one-pot solvothermal method is exploited to vertically plant piezoelectric 1T MoSe 2 nanoflowers on carbon cloth (CC) to fabricate crystallographically textured electrodes. The self-built-in electric field owing to the intrinsic piezoelectricity during the intercalation/deintercalation processes can serve as an additional piezo-electrochemical coupling accelerator to enhance the migration of Zn 2+ . Moreover, the expanded interlayer distance (9–10 Å), overall high hydrophilicity, and conductivity of the 1T phase MoSe 2 also promoted the kinetics. These advantages endow the tailored 1T MoSe 2 /CC nanopiezocomposite with feasible Zn 2+ diffusion and desirable electrochemical performances at room and low temperatures. Moreover, 1T MoSe 2 /CC-based quasi-solid-state zinc-ion batteries are constructed to evaluate the potential of the proposed material in low-temperature flexible energy storage devices. This work expounds the positive effect of intrinsic piezoelectricity of TMDs on Zn 2+ migration and further explores the availabilities of TMDs in low-temperature wearable energy-storage devices.
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PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 52
·2205017
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IF 15.153
Xirui Kong,Yichen Kong,Yayun Zheng,Lang He,Du Wang,Yan Zhao
With a high energy density, lithium–sulfur batteries (LSB) are regarded as one of the promising next-generation energy storage systems. However, many challenges hinder the practical applications of LSB, such as the dendrite formations/parasitic reactions on the Li metal anode and the “shuttle effect” of lithium polysulfides of the LSB cathode. Herein, a novel diluted medium-concentrated electrolyte (DMCE) is developed by adding 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether (TTE) into a dual salt medium-concentrated electrolyte (MCE) consisting of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI)–lithium bis(fluorosulfonyl)imide (LiFSI)/tetrahydrofuran (THF)–dipropyl ether (DPE). The optimized DMCE electrolyte is capable of protecting the Li metal anode and suppresses the dissolution of polysulfides and the “shuttle effect”, delivering a high coulombic efficiency (CE) of Li plating–stripping up to 99.6% even at a low concentration of Li salt (1.0–2.0 m ). Impressively, compared with the cells cycled in the MCE electrolyte, the Li S cells with the DMCE-2.0 m electrolyte have delivered an enhanced initial capacity of 682 mAh g −1 with an excellent capacity retention of 92% for 500 cycles. This strategy of using fluorinated ether as diluent solvent in a medium-concentrated electrolyte can accelerate the commercialization of LSB.
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Energy Technology
·
2022
·Vol. 11
·期 2
·2201102
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IF 4.149
Pengkun Wei,Miao Yu,Xin Zheng,Ruijuan Duan
Due to the shortage of freshwater resources and uneven distribution, the dye-sensitized solar cell has become an effective strategy to obtain green electric energy. However, the counter electrode (CE) is the bottleneck that restricts the development of this technology. Herein, a novel ternary nickel iron selenide with octahedral structure using a simple solvothermal strategy assisted by d -(+)-glucose (Ni 0.5 Fe 0.5 Se 2 /C) has been designed and applied as CE catalyst for the first time. Profiting from the synergistic effect between Ni and Fe, the simulative cell with the Ni 0.5 Fe 0.5 Se 2 /C CE yields a superior efficiency of 9.37% to corresponding pure selenides, notably outperforming that of conventional Pt CE (8.79%).
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JOURNAL OF POWER SOURCES
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2022
·
IF 9.794
Xirui Kong,Yichen Kong,Lang He,Wenna Zhang,Yi Song,Sheng Liu,Yan Zhao
A new ether-based electrolyte with tetrahydrofuran (THF) and di-isopropyl ether (DIPE) is proposed for Lithium–Sulfur battery (LSB). By employing the common ion effect and the weakly-solvating solvent (such as DIPE), the dissolution of lithium polysulfides and the self-discharge effect are effectively inhibited. Besides, the LiFSI has be used as the co-salt in the LiTFSI-based electrolyte to improve the ionic conductivity and inhibit the side reaction on Li metal anode . It is worth mentioning that, the L1L2TD-1382 electrolyte (LiTFSI: LiFSI: THF: DIPE = 1 : 3: 8 : 2, molar ratio) ensures a stable cycling for more than 500 cycles with a high Columbic efficiency (CE) of Li deposition/stripping (>99.3%). Impressively, with selenium doped sulfurized polyacrylonitrile (SeSPAN) cathode, the Li–S cell has delivered a high capacity of 626 mAh g −1 in 500th cycle with an excellent capacity retention no less than 93%. This work provides a new insight to electrolyte design strategy of advanced electrolytes for Li–S batteries .
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shuyan Shao,Tao Wen,Ziqun Wang,Xiaoshuang Yin,Ying Liu,Wenzhong Yang,Yun Chen
Electrocatalytic reduction of CO 2 to formate is an extremely attractive route. Here, we developed a SnSe 2 -graphene composite catalyst, and SnSe 2 nanosheets were linked to graphene by Sn-O-C bonds to form complicated hierarchical nanosheet structure. Due to the intrinsic activity of SnSe 2 and the modification of graphene, the catalyst performed excellent electrocatalytic efficacy for the reduction of CO 2 to formate, with a maximum Faraday efficiency up to 95.1% at -0.9 V (vs. RHE) and a current density of 11.8 mA cm −2 under the optimal conditions. Kinetic experiments indicated that the SnSe 2 -graphene composite achieved efficient formate selectivity for CO 2 reduction by increasing the initial transfer rate of electrons to the CO 2 molecule.
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JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Jinke Bai,Tianyi Hou,Meilun Zhang,Peilin Ou,Xiao Jin,Qinghua Li,Zisheng Su,Zeqiang Chen,Yuxiao Wang,Xueru Zhang,Yinglin Song
Environmentally friendly zinc selenide (ZnSe) based core/shell quantum dots (QDs) are promising emitting materials for special light sources and displays. However, ZnSe-based core/shell QDs with violet-blue emission that simultaneously possess thick shells and narrow emission linewidths are still challenging thus far. We herein use a gradient ZnSe x S 1-x /ZnS shell strategy to target this goal. The ZnSe x S 1-x mid shell helps the lattice strain relaxation during the growth, whereas the wide bandgap ZnS outer shell benefits the optical properties by passivating the emitting cores and improving the quantum confinement effect. These ZnSe core QDs show a unity zinc blende structure and high crystallinity . The optimized ZnSe/ZnSe x S 1-x /ZnS QDs exhibit tunable emission wavelengths (415–445 nm), narrow photoluminescence linewidths (10.2–14.2 nm), thick shells (>3.9 nm), and high photoluminescence quantum yields (>50%). We postulate that these excellent features are due to the use of alloyed ZnSe x S 1-x layer at the core/shell interfaces. This study provides a feasible idea for the development of blue ZnSe-based QDs with perfect emitting properties.
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PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
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2023
·
IF 2.7
Jiapeng Zhang,Hui Zhang,Qinghua Du,Xinjian Xie,Yi Fang,Chengchun Tang,Guifeng Chen
Quantum dots (QDs) of I-III-VI 2 ternary compounds, such as CuInSe 2 (CISe) and CuInS 2 (CIS), have broad application prospects as light-absorbing layers in solar cells due to their excellent photoelectric properties. Nevertheless, the presence of large numbers of surface defects in quantum dots will affect their performance. In this study, inverted type-I CdS/CISe core-shell QDs are successfully synthesized through thermal injection method in triethylene glycol, which is green and safe. By changing the molar ratios of CdS and CISe QDs, the components and optical properties of core-shell QDs are intensively studied by using different characterization methods (XRD, TEM, EDS, UV–vis, Raman, and fluorescence spectrum). The solar cells with the structure of FTO/TiO 2 /CdS/CdS/CISe/Mo are assembled, where the CdS/CISe core-shell QDs are used as absorption layers. The prepared devices exhibit an efficiency of 1.01% under an AM 1.5 G spectrum with a light intensity of 100 mW cm −2 .
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Minghao Bao,Junhong Chen,Bozhong Pi,Qizhen Zhang,Zhongbo Han,Hongbiao Huo,Chunpei Yu,Wenchao Zhang
A green electrocatalytic system for co-production of SATz energetic material and H 2 . • Clean electrons replace hazardous chemical oxidants for SATz synthesis with SATz yield of 75.2%. • CoSe 2 @MoSe 2 @Pt/NF achieves 30 mV@10 mA·cm −2 and 192 mV@10 mA·cm −2 overpotential for HER. • Coupling system achieves low cell voltage of 1.44 V at 10 mA·cm −2 . Replacing the kinetically sluggish oxygen evolution reaction (OER) with thermodynamically more favorable electrochemical oxidation reactions represents an effective strategy to enhance energy efficiency and economic viability in water electrolysis. Herein, we designed a CoSe 2 @MoSe 2 @Pt/NF heterostructured catalytic electrode and construct an integrated electrocatalytic coupling system that enables the co-production of azo-bridged nitrogen-rich energetic material (sodium 5,5′-azotetrazolate, SATz) at the anode and clean hydrogen energy at the cathode. Mechanistic studies reveal that hydroxyl radicals generated via water electrolysis initiate the oxidative coupling of 5-aminotetrazole, achieving a SATz yield of 75.2% under optimized conditions. The CoSe 2 @MoSe 2 @Pt/NF cathode exhibits exceptional HER catalytic activity with a low overpotential of 192 mV at 100 mA·cm −2 and a Tafel slope of 50.2 mV·dec −1 , along with remarkable stability. Notably, the assembled coupling system requires a substantially reduced cell voltage of only 1.44 V to achieve 10 mA·cm −2 , significantly lower than that of conventional overall water splitting (>1.71 V). This work presents a sustainable and energy-efficient strategy for the simultaneous production of green energetic materials and clean hydrogen fuel, opening new avenues for advanced electrocatalytic coupling systems. Download: Download high-res image (166KB) Download: Download full-size image
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Nano Research
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2023
·
IF 9.9
Zhu Yuhang,Liu Tingting,Li Lin,Cao Maosheng
Currently, as the electromagnetic (EM) environment becomes increasingly complex, single-function EM materials can hardly resist the increasing electromagnetic interference (EMI), and there is an urgent need to develop multifunctional EM materials. In this work, multifunctional WSe 2 /Co 3 C was prepared by simple hydrothermal methods. Its dielectric performance and EM response were investigated. Efficient absorption, shielding performance, and energy conversion devices were customized. By tailoring the loading content, WSe 2 /Co 3 C can switch between EM absorption and EMI shielding. The maximum shielding effectiveness (SE) of WSe 2 /Co 3 C reached 36 dB, and high reflection loss (RL) of −60.28 dB and wide effective absorption bandwidth (EAB) of 6.16 GHz can be obtained at low thickness. The multiple EM attenuation mechanisms brought by the combination of two-dimensional (2D) WSe 2 and magnetic Co 3 C are considered to be the main reason for the enhanced EM attenuation ability. The WSe 2 /Co 3 C composite provides a viable candidate for developing multifunctional EM materials in 2–18 GHz.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Kuidong Wang,Jiaxing Zhang,Aixiang Wei,Jun Liu,Yuding He,Zhen Liu,Jiaxiong Xu
Developing catalysts with long term stability at large current densities for oxygen evolution reaction (OER) remains a major challenge. Herein, the NiFeSe arrays were synthesized on the commercial nickel-iron foams (NFF) substrate using a one-step hydrothermal method by changing the hydrazine hydrate to solvent volume ratio in the precursors and reaction temperature. The NiFeSe/NFF catalyst prepared at the hydrazine hydrate to solvent volume ratio of 1:4 and reaction temperature of 160 °C shows the optimal OER electrocatalytic performance with a low overpotential of 245, 259 and 269 mV at the current density of 100, 200 and 300 mA cm −2 , small Tafel slope of 44.7 mVdec −1 and large electrochemical surface area (ECSA) of 600 cm 2 in 1 M KOH solution. Importantly, the OER activities of the NiFeSe/NFF catalyst exhibit enhancement during long-term stability test at a bias of 1.04 V (vs. Hg/HgO) for 327 h. During long-term continuous OER electrochemical process , the formation of NiFeOOH/NiFeSe heterojunction resulting from the surface reconstruction are responsible for enhancing OER activities by modulating the electron structure of interface and increasing the adsorption ability of intermediate *OH and *OOH on the surface of NiFeOOH. Our work provides new idea to design and construct heterostucture catalyst via the in-situ surface reconstruction.
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