JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 21
·9250-9264
·
IF 3.5
Liu Lvfei,Zhang Yao,Gu Yunjie,Qu Jiangwen,Wang Naiguang,Ge Shuaichen,Li Jingsha
The sluggish oxygen reduction reaction (ORR) has been one of the most majority bottlenecks of fuel cells and metal-air batteries. It is extremely desirable but challenging to explore low cost, highly active, stable catalysts toward ORR to replace commercial Pt/C catalysts. Herein, a novel hybrid system consisting of trace copper and bi-nonmetallic (N/S) modified the commercial ketjenblack (KB) carbon (Cu–NS–C) has been successfully fabricated by a pyrolysis of Cu–MOF/KB and thiourea to transform crystalline Cu/Cu 2 O nanoparticles into copper sulfide nanoparticles and the subsequent acid leaching. The optimized Cu–NS–C delivers a half-wave potential of 0.81 V versus RHE and a limiting-current density of 5.0 mA cm −2 , which is next to those of commercial 20 wt% Pt/C catalyst. Furthermore, this catalyst demonstrates much better durability and methanol tolerance than Pt/C catalyst.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Jie Tian,Zhijian Wang,Yaqin Hou,Yatao Yang,Haijun Chen,Zhanggen Huang
Inorganic Bi-based halide perovskites have attracted significant attention in the field of CO 2 photoreduction due to their excellent optoelectronic conversion performance and low toxicity. However, the inherent strong localization of electron-hole pairs remains the main factors limiting charge carrier transport and CRR performance. In this work, CBSB-x NCs with different Bi/Sb ratios were synthesized assisted by ultrasound methods to manipulate carrier behavior and assess CRR performance. The photoelectrochemical properties revealed that incorporation of Sb effectively suppressed nonradiative recombination and improved transport efficiency of charge carriers. Among the bimetallic variants, CBSB-1 NCs exhibited enhanced catalytic performance in CO production, with a yield of 38.77 μmol·g −1 and a high selectivity of 96.53 %. In-situ DRIFTS and DFT calculations indicated that Sb as co-catalytic sites promote charge transfer at the Bi-Br-Sb interface, accelerate the rapid evolution of b-CO 3 2- to HCOO - and significantly reduce the reaction energy barrier of CO.
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Huanjun Su,Weili Shi,Yumeng Zhang,Ying Lin,Yani Liu
Mg3Sb2 Zintl compounds have emerged as promising thermoelectric materials due to their favorable electronic structures and low lattice thermal conductivity. However, strong carrier scattering, including ionized impurity and grain boundary scattering, suppresses mobility and limits the power factor. This study reveals that Zn doping plays a crucial role in tuning carrier scattering mechanisms in n-type Mg3(Sb,Bi)2. The substitution of Mg with Zn weakens ionized impurity scattering, facilitating charge transport and increasing carrier mobility from ∼72 to ∼135 cm2 V–1 s–1. As a result, a high power factor of ∼2089 μW m–1 K–2 is achieved at 573 K in Mg3.155Zn0.045Sb1.5Bi0.49Te0.01. Furthermore, Zn incorporation introduces localized lattice distortions and promotes the formation of high-density dislocations, which intensify phonon scattering and significantly suppress lattice thermal conductivity to ∼0.54 W m–1 K–1 at 773 K. These synergistic enhancements contribute to an optimized thermoelectric performance, yielding a peak ZT of 1.71 at 773 K and an average ZT of 1.21. The estimated conversion efficiency reaches 13% under a 470 K temperature gradient, highlighting Zn doping as an effective strategy for advancing Mg3(Sb,Bi)2-based thermoelectric materials toward high-temperature energy harvesting applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenjie Yang,Qiankun Zhou,Hui Dong,Rongqiang Hu,Aoyun Kang,Lingli Liu,Xin Liang,Heng Zhang,Hongdian Lu,Chunxiang Wei,Anthony Chun Yin Yuen,Wei Yang
Bismuth is a promising anode material for sodium-ion batteries (SIBs) due to its ultrahigh theoretical volumetric capacity. However, its practical application is hindered by volume expansion during cycling, which leads to rapid capacity degradation. In this study, we reported an in-situ catalytic growth approach to synthesize Bi@GDY, a nanocomposite material comprising bismuth nanospheres encapsulated within a graphdiyne (GDY) core-shell structure. This unique architecture effectively mitigated volume expansion while enhancing the sodium storage performance, resulting in remarkable electrochemical properties, including high capacity, superior cycling stability, and reliable performance over a wide temperature range. The Bi@GDY anode demonstrated an outstanding capacity of 361.6 mAh g −1 with a retention rate of 96.9 % after 3000 cycles. In-situ and ex-situ characterizations revealed improved reaction kinetics and confirmed the characteristic alloying/dealloying mechanism. Furthermore, a Bi@GDY//NVP full cell delivered a high capacity of 183.2 mAh g −1 after 700 cycles with a retention rate of 86.9 %, underscoring its potential for practical SIB applications. These findings position Bi@GDY as a highly promising anode material for next-generation SIBs.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
C.X. Chen,X.Z. Zheng,W.B. Dai,C.Y. Ni,W.Y. Li,D. Wu
As energy consumption intensifies, energy saving and environmentally friendly phosphor-converted white light-emitting diodes (pc- w LEDs) have become the current research hotspots. The garnet-based CaY 2 Al 4 SiO 12 (CYAS) phosphors, with their abundant lattice sites and stable physical properties, are ideal candidates as phosphor hosts. Through comprehensive experimental and theoretical analyses, including XRD/Rietveld refinement and density functional theory (DFT) calculations, it was determined that Bi 3+ /Tb 3+ /Sm 3+ ions preferentially occupy the Y 3+ lattice site. The luminescence properties and thermal stability of CYAS: Bi 3+ /Tb 3+ /Sm 3+ have been extensively investigated. The quantum yield (QY) has been enhanced to 48.3 % due to energy transfer (ET), which is not a significant difference compared to existing phosphors, and by superposition of blue (Bi, 3 P 1 → 1 S 0 ), green (Tb, 5 D 4 → 7 F 5 ), and red (Sm, 4 G 5/2 → 6 H 5/2 ) emission, resulting in tunable spectrum and high-quality, full-spectrum white light emission. Finally, the w LED device with high color rendering index (CRI, 87), high luminous efficiency (LE, 74 lm·W −1 ), and low correlated color temperature (CCT, 4747.56 K) were fabricated by a remote ‘encapsulation’ packaging strategy, suggesting that the phosphor can be applied to high quality white light illumination.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 14
·9157-9164
·
IF 12.732
Zhiwei Chen,Yang Li,Lin Wang,Yuyu Bu,Jin-Ping Ao
In this paper, a MoS2/Rh–P bi-compound heterogeneous cocatalyst is developed to improve the photoelectrochemical (PEC) water splitting performance of a p-Si photocathode. Compared with the single cocatalysts (MoS2 and Rh–P), the bi-compound heterogeneous cocatalyst MoS2/Rh–P on the p-Si photocathode surface exhibits a much better hydrogen evolution reaction (HER) activity at the electrode/electrolyte interface, which is attributed to the synergistic electronic effect between MoS2 and Rh–P materials. Meanwhile, the TiO2 layer could serve as a linker between p-Si and the surface cocatalyst to optimize the interface energy, further promoting the photocarrier transfer process within the system. Thus, the as-prepared p-Si–TiO2–MoS2/Rh–P photocathode exhibits excellent PEC performance with a high photocurrent density of −24.1 mA cm−2 at 0 V (vs. RHE) and a positive onset potential of 0.43 V (vs. RHE). And the bi-compound heterogeneous cocatalyst provides a feasible strategy for boosting the PEC hydrogen evolution.
研究领域:
材料科学
·
能源转换与存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiyong Chen,Mingxin Zhou,Junzuo Shi,Tianquan Liang,Jie Zeng,Xia Yan,Nengneng luo,Weizhou Li,Yuezhou Wei
The effect of nominal Na/Bi ratio on the microstructure and electrical conductivity of A-site fully stoichiometric sodium bismuth titanates , Na 0.5+ x Bi 0.5− x TiO 3− δ , was investigated in this study. Bulk samples with x = 0, 0.01, 0.03, 0.05, 0.07, and 0.1 were prepared by conventional solid state reaction method. The as-calcined powders primarily exhibited the perovskite structure, which was identified by X-ray diffraction. Electron microscopic investigation of the sintered samples, however, revealed the presence of secondary phases, the amounts of which were found to increase with increasing Na/Bi ratio. Further elemental analysis by energy dispersive spectroscopy indicated that the secondary phases were mainly composed of sodium titanates with different Na/Ti ratios. The grain bulk and grain boundary conductivities of Na 0.5+ x Bi 0.5− x TiO 3− δ , measured by two-probe AC electrochemical impedance spectroscopy , significantly increased with increasing Na/Bi ratio when x ≤ 0.03, but remained almost constant at higher x . The synergetic effect of oxygen vacancy creation, grain size reduction, and secondary phase formation on the variation in the conductivity upon increasing the nominal Na/Bi ratio in Na 0.5+ x Bi 0.5− x TiO 3− δ was discussed.
研究领域:
材料科学
·
固态化学
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Chaosheng Zhang,Xiwei Lan,Qing Liu,Le Yu,Yaqian Li,Xianluo Hu
LiMn 2 O 4 -based lithium-ion batteries (LIBs) have attracted considerable attention due to their cost advantage, but industrial use has been hindered by severe capacity deterioration during cycling with LiPF 6 -based carbonate electrolytes, especially under high-temperature (55 °C) cycling conditions. Herein, a bifunctional, Janus-faced, inorganic-organic hybrid separator is demonstrated to ensure long-term cycling reversibility of LiMn 2 O 4 ||graphite LIBs. The monolithic all-nanomat separator is constructed by a bottom layer of poly ( m -phenylene isophthalamide) nanofibers by electrospinning and a top layer of interpenetrating hydroxyapatite/bacterial cellulose fibers . Benefiting from such a unique Janus configuration, the as-formed separator exhibits synergistic coupling in functions, simultaneously scavenging trace acid and mitigating the dissolution/deposition of Mn 2+ ions in batteries. Consequently, the cells with the Janus separator achieve enhanced capacity retention compared with traditional cells with the commercial polyolefin separator over 100 cycles at 55 °C. Furthermore, bulk structure and surface chemistry characterizations confirm that irreversible structural change in the LiMn 2 O 4 cathode could be avoided, and the amount of manganese on the graphite anode from the cycled cells with the Janus separator is suppressed. This work demonstrates that a composite Janus all-nanomat separator offers an unexpected route towards highly durable LiMn 2 O 4 -based LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Shuai Zhao,Zan Dai,Wenjin Guo,Fengxi Chen,Yunling Liu,Rong Chen
Selective oxidation of glycerol to produce aimed high-value added products is of great importance in chemical industry. Photocatalytic oxidation provides a promising and green strategy for selective glycerol oxidation. In this work, we develop a Bi/Bi 3.64 Mo 0.36 O 6.55 heterostructure via a facile solvothermal method for the selective oxidation glycerol to 1, 3-dihydroxyacetone (DHA) in water under visible light irradiation. The excellent performance in activity and selectivity of Bi/Bi 3.64 Mo 0.36 O 6.55 heterostructure for DHA production is attributed to a dual-pathway photocatalytic reaction process. The mass production 1 O 2 ascribed to the reduced energy gap (ΔE ST ), the enhanced spin-orbit coupling (SOC) and the presence of oxygen vacancy is beneficial for the selective oxidation of glycerol to DHA. Simultaneously, the metallic bismuth in the heterostructure promotes the separation of photogenerated holes with efficient redox potential and facilitates the binding bismuth with ortho-hydroxyl in glycerol, thus enhancing the yield and selectivity of DHA production. This work provides a novel strategy and thorough understanding of the development of highly efficient bismuth-based photocatalyst for selective oxidation in organic reactions.
研究领域:
化学工程
·
材料科学
·
催化反应
✓ 已验证
DOI
高影响因子
BIOMATERIALS
·
2019
·
IF 10.273
Zhao Wang,Tao Jia,Qianqian Sun,Ye Kuang,Bin Liu,Mengshu Xu,Hui Zhu,Fei He,Shili Gai,Piaoping Yang
The current conventional photo-therapeutic agents often show low therapy efficacy because of their single treatment model, the limited penetration depth of excitation light and hypoxia in the tumor microenvironment (TME). Herein, a new type of phthalocyanine manganese (MnPcE 4 ) photosensitizer with strong NIR absorption was designed and fabricated for the first time, and was used to modify pure Bi nanomaterials to obtain an intelligent multifunctional Bi/MnPcE 4 nanocomposites . The Mn 2+ in the Bi/MnPcE 4 nanocomposite could catalyze H 2 O 2 to generate O 2 , thus helping to overcome TME hypoxia and enhancing the photodynamic therapy (PDT) efficacy. Further, the nanocomposites showed excellent T 1 -weighted MRI performance. Our novel use of a pure metal Bi core, offers lower toxicity, higher CT imaging performance , and a photothermal therapy (PTT) effect triggered by 808 nm near infrared (NIR) laser. Moreover, in vivo fluorescence imaging ( in vivo FL) vividly showed that the nanocomposite rapidly accumulates in tumor sites due to the enhanced permeability and retention (EPR) effect and metabolized in the organs. The presence of Bi enables the use of these nanocomposites as a CT contrast agent, and the Mn content enables them to be used in MRI. This triple imaging ability implies that our nanocomposites have a high potential for use in imaging directed tumor therapy.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤治疗学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 7
·3500-3510
·
IF 5.503
N. Angulakshmi,R. Baby Dhanalakshmi,Paulina Półrolniczak,Mariusz Walkowiak,Pengfei Xie,Xiaohui Tian,Yingke Zhou,A. Manuel Stephan
Controlling the shuttling of lithium polysulphides (LiPS) to enhance the utilization of elemental sulfur has been considered as an important issue to improve the energy density and coulombic efficiency of lithium–sulfur batteries. The present work is aimed at demonstrating a simple preparation of a bi-functional trilayer membrane by coating Li7La3Zr2O12 and activated carbon on either side of the commercial membrane (Celgard 2320). The coated membrane was characterized by ionic conductivity, thermogravimetric and contact angle analyses. In the trilayer membrane, each component acts for a particular purpose: the activated carbon not only acts as a barrier for the migration of polysulfide but also provides additional pathways for electron transport for the insulating sulphur cathode, while the porous Celgard separator facilitates the migration of lithium ion, and the Li7La3Zr2O12 not only promotes the lithium ion migration by percolation but also prevents polysulfide shuttling via the electrostatic repulsive force. The coated membrane offered higher ionic conductivity and thermal stability compared to the uncoated one. The lithium–sulfur battery with the coated separator delivered higher specific discharge capacity than the uncoated separator. XPS studies revealed the absence of polysulfide deposition on the lithium metal surface after the charge–discharge cycling, which further confirms the suppression of polysulfide shuttling by permselective membranes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·3684-3692
·
IF 9.9
Wu Wenbo,Zhu Jiaye,Tong Yun,Xiang Shuangfei,Chen Pengzuo
Regulating the electronic structure of Bi-based materials by alloying engineering is promising to promote the electrocatalytic activity, but it remains some challenges to be solved. In this study, a facile electrochemical co-deposition strategy is developed to synthesize the bimetallic Bi 9 Cu 1 alloy nanosheet on carbon cloth (Bi 9 Cu 1 /CC), which represents a novel self-supporting electrode for the electrocatalytic carbon dioxide (CO 2 ) reduction reaction (CO 2 RR). The Bi 9 Cu 1 /CC catalyst has achieved a remarkable catalytic performance with high Faradaic efficiencies (FE) of over 90% for formate at wide potentials from −0.7 to −1.2 V vs. reversible hydrogen electrode (RHE). Moreover, the reversible Zn-CO 2 battery can be driven by Bi 9 Cu 1 /CC cathode with a largest power density of 1.4 mW·cm −2 , and superior operating stability. The systematic characterizations and electrochemical results confirm that the improved catalytic active sites, the enhanced mass/charge transport and the optimal reaction kinetics of Bi nanosheet are realized for CO 2 RR by Cu alloying. In situ attenuated total reflection infrared (ATR-IR) result confirms the bimetallic Bi-Cu active sites prefer to follow the ⋆OCHO conversion pathway. The density functional theory (DFT) calculations suggest that the Cu alloying contributes to the increased density of states near the Fermi surface of Bi and the optimized adsorption of ⋆OCHO intermediates on the Bi sites, resulting in the excellent catalytic performance.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）