Metals
·
2026
·Vol. 16
·期 8
·922
·
IF 3.1
Guangya Hou,Jingnan Wei,Jianli Zhang,Qiang Chen,Yiping Tang
The development of lightweight, low-cost, and high-performance non-precious metal electrocatalytic electrodes is critical to advancing the practical implementation of methanol and urea oxidation reactions (MOR and UOR) in next-generation energy conversion systems. Herein, we reported a facile synthesis of a W-Se co-modified porous Ni/Cu paper electrode (W-NiSe/Cup) via synchronous pulse electrodeposition onto filter paper-derived porous Cu foil. The hierarchical porosity and high specific surface area originated from the paper template, while synergistic electronic modulation among Ni, W, and Se enhanced intrinsic catalytic activity. At 0.8 V, the W-NiSe/Cupelectrode delivered current densities of 298 mA·cm−2(MOR) and 305 mA·cm−2(UOR) with a lower-mass loading, representing 1.29-fold and 1.34-fold enhancements over the Ni/Cupelectrode. Furthermore, the electrode exhibited exceptional durability: under chronopotentiometry operation at 100 mA·cm−2in a 6-fold-concentrated electrolyte (6 M KOH + 3.0 M CH3OH + 1.98 M CO(NH2)2), the operating potentials retained 95.74% (MOR) and 118.05% (UOR) of their initial values after 9 h. This study offers a novel strategy for designing lightweight non-precious metal catalytic electrodes for portable energy devices and also verifies the broad potential of biomass templates in constructing advanced energy electrocatalytic materials.
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Qihu Wu,Wenchang Wang,Zhiyao Ming,Tian Fang,Denghui Tang,Minxian Wu,Pengju Wang,Shuiping Qin,Naotoshi Mitsuzaki,Zhidong Chen
In this study, Se-Sb alloy coatings were successfully fabricated for the first time via constant potential electrodeposition from a choline chloride–ethylene glycol deep eutectic solvent. The correlation between deposition potential and the morphology, composition, crystal phase, optical, and electrical properties of the coatings was systematically investigated. The results showed that as the deposition potential shifted in the negative direction, the fibrous morphology of the coatings initially became denser and subsequently looser. Correspondingly, the Se content first decreased and then increased, while the Sb content exhibited the opposite trend. The crystalline structure was primarily characterized by an amorphous Sb 2 Se 3 phase. Although both the bandgap and photocurrent response initially increased and then decreased with more negative deposition potentials, the coatings consistently exhibited excellent p-type semiconductor characteristics. Chronoamperometry (CA) analysis indicated that the nucleation mechanism of Se-Sb alloys transitioned from diffusion-controlled three-dimensional (3D) progressive nucleation to diffusion-controlled 3D instantaneous nucleation as the deposition potential shifted from −0.45 V to −0.65 V. Furthermore, cyclic voltammetry (CV) analysis revealed an induced co-deposition mechanism: Se was first deposited on the FTO substrate, which subsequently induced the co-deposition of Se and Sb to form the Se-Sb alloy coatings. Finally, a comparison with coatings annealed at 300 °C demonstrated that annealing significantly improved the crystallinity, resulting in the formation of crystalline Sb 2 Se 3 . However, the photocurrent response decreased by a factor of 5.18. These findings suggest that the as-deposited Se-Sb alloy coatings exhibit superior photoelectrical performance compared to their annealed counterparts, highlighting their promising potential for photoelectric applications.
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高影响因子
SOLAR ENERGY
·
2025
·
IF 6.6
Zhen Li,Guizhang Guo,Zhou Yu,Zengyue Ma,Yonggang Lei,Libo Yu,Junke Wang
The use of quantum dots (QDs) to sensitize titanium TiO 2 in photoelectrochemical cells (PECs) for solar-driven water splitting represents a highly promising method for converting solar energy into storable chemical energy in the form of hydrogen. The characteristics and interfaces of the QDs play a crucial role in determining the range of light absorption and the efficiency of charge transport and separation upon photoexcitation. Herein, we build CdS x Se 1-x QDs sensitized TiO 2 photoanodes with different amount of Se source by one-step hydrothermal process using thioglycolic acid (TGA) as bifunctional linker. Our results demonstrate that TGA can both anchor QDs to TiO 2 and decompose S for CdS x Se 1-x QDs preparation. The influence of Se source dosage on PEC performance of CdS x Se 1-x /TiO 2 photoanode has been investigated. UV–vis absorption data shows the increase of Se source can enlarge light response range. X-ray photoelectron spectroscopy, transient open-circuit voltage decay and electron lifetime tests indicate proper thickness of SeO 2 which formed on CdS x Se 1-x QDs has the effect to block charges recombination between CdS x Se 1-x /TiO 2 photoanode and electrolyte, improving the electron lifetime of photogenerated electrons. Consequently, the photoelectrochemical cell (PEC) constructed with a CdS x Se 1-x /TiO 2 photoanode, prepared using 0.8 mmol of selenium source, has achieved a photocurrent density of 14.31 mA cm −2 and a photoconversion efficiency of 15.74 %. These results indicate significant potential for the production of green hydrogen.
研究领域:
材料科学
·
纳米技术
·
能量转换
·
光电化学
·
可再生能源
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高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 15
·2211311
·
IF 29.4
Dawei Sha,Yurong You,Rongxiang Hu,Xin Cao,Yicheng Wei,Heng Zhang,Long Pan,ZhengMing Sun
Anion vacancy engineering (AVE) is widely used to improve the Li-ion and Na-ion storage of conversion-type anode materials. However, AVE is still an emerging strategy in K-ion batteries, which are promising for large-scale energy storage. In addition, the role of anion vacancies on ion storage is far from clear, despite several proposed explanations. Herein, by employing VSe 2 as a model conversion-type anode material, Se vacancies are intentionally introduced (labeled as P-VSe 2− x ) to investigate their effect on K + storage. The P-VSe 2− x shows excellent cyclability in half cells (143 mA h g −1 at 3.0 A g −1 after 1000 cycles) and high energy density in coin-type full cells (206.8 Wh kg −1 ). By applying various electrochemical techniques, the effects of Se vacancies on the redox potentials of K-ion insertion/extraction and the K-ion diffusion in electrodes upon cycling are uncovered. In addition, the structural evolution of Se vacancies during potassiation/de-potassiation using various operando and ex characterizations is revealed. Moreover, it is demonstrated that Se vacancies can facilitate the breaking of V Se bonds upon the P-VSe 2− x conversion using theoretical calculations. This work comprehensively explains the role of anion vacancies in ion storage for developing high-performance conversion-type anode materials.
研究领域:
材料科学
·
电化学
·
能源存储
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Energy Technology
·
2022
·Vol. 11
·期 11
·2200376
·
IF 4.149
Peng Xu,Decheng Zhao,Shupei Liu,Jinghui Ren,Jian Zhou,Ning Wang,Zhoulu Wang,Xiang Liu,Yutong Wu,Yi Zhang
Selenium cathodes are expected to become next-generation energy storage materials due to their high electronic conductivity and volumetric capacity. However, their commercial applications are hindered by polyselenides dissolution and low Se utilization. Herein, a biomass compound, namely lychee seed, is used as a sustainable precursor to design hierarchically porous carbon by a single-step carbonization activation method. With a unique hierarchical porous structure, the lychee seed–derived activated carbon (LSDAC) used to encapsulate selenium delivers a reversible capacity of 446 mA h g −1 at 2 C and 291 mA h g −1 at 5 C after 1000 cycles. The Se/LSDAC electrodes show the most favorable fast-charging and good cycling behavior compared to the previously reported biomass-based carbon materials. By increasing the Se area loading to 9.5 mg cm −2 , the Se/LSDAC cathode maintains an areal capacity of 3.7 mA h cm −2 (3.2 mA cm −2 areal current density) after 80 cycles. High Se loading and economical and fast-charging cathode designs in Li–Se batteries are inspired.
研究领域:
电化学储能
·
材料科学
·
纳米能源材料
·
可持续能源技术
·
先进电池技术
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DOI
高影响因子
Chinese Physics B
·
2018
·Vol. 27
·期 1
·016402
·
IF 1.321
Xue Min,Jiangjian Shi,Linbao Guo,Qing Yu,Pengpeng Zhang,Qingwen Tian,Dongmei Li,Yanhong Luo,Huijue Wu,Qingbo Meng,Sixin Wu
The Zn/Sn ratio in Cu2ZnSn(S, Se)4 (CZTSSe) films has been regulated to control the composition-related phase, defect, and photoelectric properties for high performance kesterite solar cells. It is found that the increase in the Zn/Sn ratio can slightly narrow the energy band gap to extend the light absorption range and improve the photocurrent. Optimal Zn/Sn ratio of 1.39 in CZTSSe film is obtained with the least secondary phase, the lowest defect density, and the longest charge recombination lifetime. Up to 10.1% photoelectric conversion efficiency has been achieved by this composition regulation.
研究领域:
光伏技术
·
材料科学
·
半导体材料
·
可再生能源
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 5
·3350-3355
·
IF 3.201
Ailijiang Abudurusuli,Kui Wu,Shilie Pan
Four new quaternary chalcogenides A2Ba7Sn4Q16 (A = Li, Na; Q = S, Se) were successfully synthesized in vacuum-sealed silica tubes for the first time. All of them crystallize in the noncentrosymmetric (NCS) cubic I3d space group with the cell parameters ranging from 14.807 to 15.4163 Å and Z = 4, respectively. Interestingly, their isostructures are different from the structural transformations (from tetragonal to trigonal) appearing in previously reported Na2BaSnQ4 compounds. As observed in their structures, (Na/Ba)Q4 and SnQ4 units alternately connect with each other by sharing corners to build a three-dimensional (3D) framework structure with charge-balanced Ba cations located within tunnels, which is different from the observation that the Na atoms located inside the tunnels formed by the interconnection of the BaS8 and SnS4 units in Na2BaSnS4. Optical properties (diffuse-reflection, IR, and Raman spectra) were also systematically studied and the results indicate that their optical bandgaps are in the range from 1.75 to 2.5 eV. Moreover, the second harmonic generation (SHG) responses of the title compounds were also measured to be about 0.1–0.5 times higher than that of benchmark AgGaS2 under 2.09 μm radiation.
研究领域:
材料科学
·
无机化学
·
非线性光学
·
晶体学
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Lu Chengxing,Li Boyu,Li Qun,Liu Shuaishuai,Cheng Jinnuo,Yan Jiahao,Wang Zemin,Liu Tong,Wang Jinkai,Zhao Qing
Sluggish kinetics and shuttle effects hinder high-energy rechargeable sodium-chalcogen batteries, requiring nanostructured positive electrodes with excess conductive additives. Here, we show that an acidic binder-induced corrosion strategy enables activity in bulk S/Se/Te positive electrodes. Carboxylic acid-rich binders create an acidic microenvironment (pH≈3) during processing, triggering spontaneous formation of copper chalcogenide interlayers on Cu current collectors. These interlayers reconstruct into active Cu 2 X (X = S/Se/Te) catalysts during cycling. Using Na-Se batteries, experimental and DFT analyses confirm Cu 2 Se reduces the liquid-solid conversion barrier by ~24.1% and accelerates polyselenides conversion. Polar groups in the binders enhance chemisorption, reducing the shuttling effect. Consequently, bulk Se with alginic acid binder achieves 96% theoretical utilization at 0.1 A g ‒1 , rate capability of 508 mAh g ‒1 at 20 A g ‒1 , stable cyclability at 5 A g ‒1 over 16,000 cycles, and low-temperature operation at 0.1 A g ‒1 (94% capacity retention at −20 °C). The strategy of transforming binders into active interface modulators provides a generalizable approach for other chalcogens, enabling practical and host-free rechargeable metal batteries with chalcogen positive electrodes.
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PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 22
·5391-5401
·
IF 4.3
Qi Chengcheng,Wang Wei,Dong Yongping
Single-atom catalysts received increasing attention due to their maximum atom utilization efficiency. However, metal-free single atoms have not been used to construct electrochemical sensing interfaces. In this work, we demonstrated the use of Se single atoms (SA) as electrocatalyst for sensitive electrochemical nonenzymatic detection of H 2 O 2 . Se SA was synthesized and anchored on nitrogen-doped carbon (Se SA/NC) via a high-temperature reduction strategy. The structural properties of Se SA/NC were characterized by transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and electrochemical techniques. The results showed that Se atoms were uniformly distributed on the surface of the NC. The obtained SA catalyst exhibited excellent electrocatalytic activity toward H 2 O 2 reduction, and can be used to detect H 2 O 2 in a wide linear range from 0.04 mM to 11.1 mM with a low detection limit of 0.018 mM and high sensitivity of 403.9 µA mM −1 cm −2 . Moreover, the sensor can be used for the quantification of H 2 O 2 concentration in real disinfectant samples. This work is of great significance for expanding the application of nonmetallic single-atom catalysts in the field of electrochemical sensing. Graphical abstract Se single atoms (Se SA) as novel electrocatalyst were synthesized and anchored on nitrogen-doped carbon (NC) for sensitive electrochemical nonenzymatic detection of H 2 O 2
研究领域:
电化学传感
·
催化
·
纳米材料
·
分析化学
·
材料科学
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高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Yanchun Yang,Xiaojiao Kang,Lijian Huang,Song Wei,Daocheng Pan
Earth abundant Cu 2 ZnSn(S,Se) 4 (CZTSSe) has been considered as one of the most promising thin film solar cell absorber candidates. Here, we develop a facile water-based precursor solution approach for depositing high-efficiency Cu 2 ZnSn(S,Se) 4 thin film solar cells. In this environmentally friendly approach, inexpensive elemental Cu, Zn, Sn and S powders are used as the starting materials and are dissolved in the aqueous solution of thioglycolic acid and methylamine, forming a homogeneous precursor solution for depositing Cu 2 ZnSnS 4 nanocrystal thin film . As-deposited CZTS nanocrystal thin films are selenized to form the large-grain CZTSSe absorber layers . It was found that Na doping plays an important role in the formation of the extremely dense and flat CZTSSe absorber layer, and fill factor can be significantly improved for Na-doped CZTSSe solar cells, which lead to a photoelectric conversion efficiency of 6.96% with an open-circuit voltage of 378 mV, a short current density of 28.17 mA cm −2 , and a fill factor of 65.4%.
研究领域:
材料科学
·
新能源材料
·
半导体薄膜
·
光伏技术
·
无机功能材料
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 13
·135503
·
IF 3.953
Shuyang Hu,Qiuyan Shuai,Yulong Lin,Yan Fu,Meng Li
L-3,4-dihydroxy-phenylalanine (L-dopa) is the most widely used drug in Parkinson's disease treatment. However, development of cost-effective and high-throughput sensors to accurate enantioselective discrimination of L-dopa and D-dopa remains challenging to date. Herein, on the basis of the peroxidase-mimic activity of chiral FexCuySe nanoparticles, we demonstrated a novel colorimetric sensor for determination of chiral dopa. The surface chiral ligand, L/D-histidine (L/D-His), endowed the nanozymes with enantioselectivity in catalyzing the oxidation of dopa enantiomers. According to the values of kcat/Km, the efficiency of L-His modified nanoparticles (L-FexCuySe NPs) towards L-dopa was 1.56 times higher than that of D-dopa. While, D-His can facilely reverse the preference of the nanozyme to D-dopa. On the basis of high catalytic activity and enantioselectivity of L-FexCuySe NPs in oxidation of L-dopa, the L-FexCuySe NPs-based system can be utilized for detection of L-dopa. The linear ranges for L-dopa determination were 5 μM–0.125 mM and 0.125 mM–1 mM with a detection limit of 1.02 μM. Critically, the developed sensor has been successfully applied in the quality control of clinical used L-dopa tablets. Our work sheds light on developing simple and sensitive chiral nanomaterials-based sensors for drug analysis.
研究领域:
生物化学
·
医学诊断
·
纳米技术
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DOI
高影响因子
AICHE JOURNAL
·
2023
·Vol. 69
·期 10
·e18153
·
IF 3.7
Jiahui He,Suiqin Li,Chun Li,Kai Li,Yinjie Xu,Mengxin Wang,Shuying Zhao,Jiefeng Zhang,Xing Zhong,Xiaonian Li,Zhengbin Zhang,Jianguo Wang
The exploration of efficient and environmentally friendly oxidation method is highly desirable to overcome the critical problems of poor selectivity and heavy metal contamination for the fine chemicals industry. Herein, a self-supported three-dimensional (3D) Se Ni 5 P 4 nanosheet electrocatalyst was rationally designed and fabricated. Benefiting from the synergistic effect of aminoxyl radical and mesoporous Se Ni 5 P 4 /graphite felt (GF), an excellent performance of ≥98% selectivity and 33.12 kg (m −3 h −1 ) space–time yield was obtained for sterol intermediate oxidation with the enhanced mass transfer effect of the continuous flow system. The doping of anionic selenium and phosphorus modulated the electronic structure of Se Ni 5 P 4 , and the oxyhydroxides generated by surface reconstruction accelerated the turnover of 2,2,6,6-tetramethyl-1-piperidine N -oxyl (TEMPO), thereby enhancing the intrinsic electrocatalytic activity. A scale-up experiment was conducted with stacked-flow electrolyzer demonstrated the application potential. This work provided an efficient synergistic electrocatalytic strategy to facilitate rapid electron and mass transfer for electrochemical alcohol oxidation and highlighted the potential for practical electrosynthesis applications.
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高影响因子
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