CHEMICAL ENGINEERING SCIENCE
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2026
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IF 5.1
Zhongshuang Xu,Chiyu Shen,Pengxu Yan,Xiaojing Zhang,Shuai Wang,Zhimao Yang,Chuncai Kong,Qikui Fan
Temperature is a key operating variable that governs both activity and selectivity in the electrochemical CO 2 reduction reaction (CO 2 RR). Here, we systematically elucidate the temperature-dependent behavior of a bismuth-based catalyst supported on carbon nanotubes (Bi-CNT) over a broad window of 303–343 K. The catalyst delivers a maximum Faradaic efficiency of 95% for formate at 318 K, accompanied by a high partial current density for formate of 285.6 mA cm −2 at a total current density of 300 mA cm −2 . By combining in-situ Raman spectroscopy with molecular dynamics simulations, we reveal that the moderate heating enhances formate selectivity through a cooperative increase in local alkalinity and a restructuring of the hydrogen‑bond network of interfacial water, which suppress the hydrogen evolution reaction. At elevated temperatures, the attenuation of local alkalinity and the growth of weakly hydrogen‑bonded water populations promote CO and H 2 formation, leading to diminished formate selectivity. These findings establish temperature‑mediated control of the interfacial microenvironment as an efficient strategy for robust, high‑rate CO 2 ‑to‑formate conversion under industrially relevant, thermally dynamic operating conditions.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Taihua Zhang,Xiaofeng Li,Yunfei Lu,Wei Guo,Yan An,Xueting Chang
Polyaniline (PANI) is a promising organic thermoelectric material, but its application is limited by the intrinsic trade-off between electrical conductivity ( σ ) and Seebeck coefficient ( S ). Here, we report a multi-interface engineering strategy to enhance the thermoelectric performance of PANI/Bi₂Te₃ composites. HCl-doped PANI (HPANI) and Bi₂Te₃ are mechanically mixed, and a small amount of emeraldine base PANI (PANI-eb) is introduced to construct additional organic–inorganic interfaces. XPS and UV-vis spectroscopy reveal that these interfaces induce partial de-doping of HPANI, progressively widening the optical bandgap from 1.49 eV to 2.96 eV and reducing carrier concentration. Simultaneously, the increased interfacial density creates energy barriers that filter low-energy carriers, enhancing the average carrier mobility. Hall measurements confirm a mobility increase from 39.9 to 118.6 cm²·V⁻¹·s⁻¹ at 10 wt.% PANI-eb, while carrier concentration decreases monotonically. Temperature-dependent transport further supports the energy-filtering mechanism. Optimized hot pressing at 75 °C improves interfacial contact and polymer chain ordering, leading to simultaneous enhancement of σ and S . The resulting composite achieves a room-temperature S of 149.1 μV·K⁻¹, σ of 17.35 S·cm⁻¹, and a power factor of 38.59 μW·m⁻¹·K⁻¹, which is comparable to the best literature values for bulk PANI-based composites. This work demonstrates that rational interfacial design with PANI-eb, combined with moderate thermal treatment, provides an effective strategy to balance σ and S in polymer-based thermoelectric materials.
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CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Dan Wu,Yanni Lang,Liang Xu,Qiyuexin Wang,Qiu Fu,Bingli Li,Xinye Zhao,Zhaoyi Yin,Yongjin Li,Dacheng Zhou,Yangke Cun,Zhiguo Song,Yugeng Wen,Yong Yang,Jin Han,Jianbei Qiu
The circular dichroism (CD) signal of D-BiOBr/Bi 0.3 g flipped and intensified. • The nanosheets of D-BiOBr/Bi 0.3 g were arranged in a spiral (counterclockwise) manner, forming petal-shaped nanospheres. • 0.3 g D-BiOBr/Bi exhibits a CO production rate of 84.27 μmol・g −1 h −1 , 3.34 times the value of D-BiOBr and 4.00 times that of 0.3 g pristine BiOBr/Bi sample. • LSPR boosts the migration of spin−down polarized electrons and improves the separation efficiency of photogenerated electron−hole pairs. Chiral inorganic nanomaterials have shown considerable promise in photocatalysis, owing to their distinctive optical activity and asymmetric interfacial effects. Metallic bismuth (Bi) exhibits a localized surface plasmon resonance (LSPR) effect, which markedly enhances both the generation and separation efficiencies of photogenerated electron-hole pairs. By employing D-sorbitol as a chiral inducer, we successfully synthesized chiral D-BiOBr/Bi nanocomposites. We propose that the synergistic integration of metallic Bi and chiral BiOBr enables effective modulation of chirality-induced spin selectivity (CISS), thereby enhancing spin polarization and promoting CO production from CO 2 reduction. Among the prepared samples, D-BiOBr/Bi 0.3 g exhibited the highest photocatalytic CO 2 reduction activity, selectively converting CO 2 to CO. The CO production rate of D-BiOBr/Bi 0.3 g was 84.27 μmol g −1 h −1 , which was 4.00 times and 3.34 times that of BiOBr/Bi 0.3 g and D-BiOBr respectively. Furthermore, magnetic conductive atomic force microscopy (Mc-AFM) measurements revealed that D-BiOBr/Bi 0.3 g generated the strongest tunneling current with an opposite polarity compared to its controls, providing indirect evidence for CISS-associated spin-selective charge transport. Collectively, our findings demonstrate a strong coupling between the LSPR of metallic Bi and structural chirality, which cooperatively boosts spin-polarized electron generation, accelerates electron-hole pair separation, and significantly improves photocatalytic CO 2 reduction performance.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xiaohan Li,Yi Wen,Chenguang Qian,Bowen Cui,Fang Yuan,Chunquan Li,Zhiming Sun
Diatomite-induced amino coordination transformation Bi-MOF composite was prepared. • Surface silanol groups modulate Bi 3+ coordination, inducing amino ligand transformation. • The coordination transformation forms highly dispersed NH 2 -Bi-MOF nanowhiskers. • The composite shows enhanced photocatalysis, cycling stability and lower costs. Developing photocatalysts featuring outstanding catalytic activity and economic viability contributes greatly to artificial carbon cycling and addressing energy and environmental challenges. In this study, we adopted a strategy combining amino ligand modification with diatomite support to successfully synthesize amino-modified NH 2 -Bi-MOF/diatomite composites. These materials utilize the silanol groups on the diatomite surface to modulate the coordination environment of the Bi 3+ metal centers, inducing the conversion of amino ligands and promoting the formation of Bi-N bonds, thereby transforming the morphology of the NH 2 -Bi-MOF from an agglomerated state to highly dispersed nanowhiskers. The characterization results indicate that the highly dispersed structure endows the material with outstanding chemical stability, light-harvesting capability, CO 2 adsorption capacity, and carrier separation efficiency. Meanwhile, the optimal sample, NH 2 -Bi-MOF/diatomite-0.2, achieves a CO production rate of 10.440 μmol·g −1 ·h −1 , representing increases of 78% and 45% compared to Bi-MOF and NH 2 -Bi-MOF, respectively. Notably, no apparent decline in catalytic performance was observed after four cycles. Furthermore, the introduction of diatomite substantially reduces catalyst preparation costs. This study also systematically elucidates the conversion mechanism of amino ligands and the interfacial synergy between diatomite and NH 2 -Bi-MOF, clarifying the photocatalytic CO 2 reduction pathways and core mechanisms of the composite material. The findings provide new insights for the development and industrial application of highly efficient and economical photocatalysts. Download: Download high-res image (191KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Jianxing Liu,Lin Nie,Jiamu Liu,Fengling Zhang,Yu Zhang,Mao Liu
Efficient photocatalytic nitrogen fixation critically depends on rapid charge carrier transport and effective surface reactions. In this study, a Bi 2 MoO 6 -based photocatalyst was successfully developed through surface modification with varying concentrations of ascorbic acid. After modification by ascorbic acid, defects were introduced on the surface of Bi 2 MoO 6 catalyst, which changed the octahedral coordination environment of MoO 6 , resulting in structural adjustment, reduced band gap, increased conduction potential, and reduced surface work function. These changes facilitated accelerated photo-induced charge migration and separation of Bi 2 MoO 6 . Consequently, the efficiency of photogenerated charge carrier separation was significantly enhanced, resulting in improved photocatalytic performance. Notably, the optimized BMO-1 catalyst exhibited a maximum NH 3 production rate of 240.5 μmol·g −1 ·h −1 without the use of sacrificial agents under visible light irradiation, which is 4.5 times higher than that of pristine Bi 2 MoO 6 . This work demonstrates a simple, effective, and controllable strategy for catalyst modification to boost photocatalytic nitrogen fixation performance.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Kaijun Liang,Jiajie Song,Minjun Kuang,Xiaoping Wu,Songbai Qiu,Qian Zhang,Tiejun Wang
The direct upgrading of biomass-derived aqueous ethanol to produce long-chain alcohols is important due to the growing demand for value-added sustainable fine chemicals and liquid fuel. In this work, a bimetallic Ni@C catalyst was synthesized by using a facile sol–gel method with bismuth (Bi) doping. The bimetallic NiBi-1/1@C catalyst exhibited distinct advantages in forming C6+ high-carbon alcohols and inhibiting C1 byproducts compared with the monometallic Ni@C. Optimally, an ethanol conversion up to 87.2% with a C6+ alcohol selectivity of 79.9% was demonstrated and the C1 byproduct selectivity was suppressed to 10.1%. The doping of Bi modulates the adsorption of aldehydes on the Ni site, which inhibits the C–C cleavage side reaction, thus realizing the direct and efficient conversion of an ethanol solution to C6+ alcohols. These findings provide a promising strategy for directly converting biomass-derived ethanol to sustainable high-carbon alcohols and biofuel precursors.
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CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Jing Mao,Yunpeng Qu,Qiuyun Yang,Xiance Zhu,Xiaosi Qi,Yao Liu
Metacomposites have shown promising prospects in the application fields of radio frequency bands such as electromagnetic (EM) shielding/absorbing, meta-antennas, and stealth. However, the realization of their negative parameters is not due to the periodic array structure, which leads to the complex and ambiguous structure-property relationship. Therefore, we have created a bifunctional structure design strategy based on the three-dimensional network structure of carbon nanotubes (CNT) and the matrix phase of Bi and Fe 3 O 4 synergy. This strategy is based on the percolation concept of conductor/insulator and achieves dual-functional responses of magnetism/dielectric. We achieved a ε′ -negative response in the range of 100 MHz to 1 GHz by utilizing the plasma oscillation effect in the CNT network. The ε′ -negative value was regulated within the 1000 order of magnitude by the CNT content and the electric field frequency. Owing to the competition of multi-level interface polarization mechanisms, the effective carrier concentration of metacomposites is diluted, resulting in a significantly lower ε′ order compared to pure conductors. The maximum saturation magnetization of the CNT/Bi@Fe 3 O 4 metacomposites after percolation reaches 15–25 emu/g. The effectiveness of this structure can be further analyzed by using the equivalent circuit model and radar cross-section EM simulation technology, thereby clarifying the capacitance/inductance characteristics and EM shielding effect of ε′ -negative materials. Our work offers a novel structural design concept which broadens the scope of EM metacomposites and pave the way to practical applications.
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ACS Catalysis
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2025
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IF 13.1
Zhao Sun,Bin Wang,Nicholas F. Dummer,Haifeng Qi,Louise R. Smith,Zhiqiang Sun,Graham J. Hutchings
Catalytic methane decomposition is a highly promising CO2-free hydrogen production technology with carbon material generation; however, developing catalysts that can efficiently decompose methane at moderate temperatures remains challenging. In this study, we develop a series of NiMn–Bi molten alloy catalysts with various Ni:Mn ratios for catalyzing methane decomposition. The Mn-modified Ni–Bi alloy exhibits a CH4 conversion of 15.3% at 850 °C, and the corresponding hydrogen production rate increases by 112% compared with Ni–Bi. The ternary alloy catalyst also demonstrates stability at this production rate for up to 80 h. Molecular dynamics simulations show that the introduction of Mn significantly reduces the strong interaction between the active metal Ni and the solvent metal Bi, thereby accelerating the methane dissociation rate. More importantly, among the theoretically calculated binding energy, interfacial energy, Ni–Bi interaction, and mean-square displacement, interfacial energy, a comprehensive demonstration of surface energy and atomic interactions, is proposed as a potential descriptor for predicating and estimating the catalytic performance of the molten alloy-based catalysts.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 41
·28531-28540
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IF 10.7
Wenfeng Liu,Zhiyuan Li,Hongbo Liu,Yihan Zhou,Jiakai Zeng,Yi Zhao,Lu Cheng,Yao Zhou,Shengtao Li
The enhancement of the energy storage property of capacitor films at elevated temperature has been considered a critical area of research owing to the essential requirements of capacitor applications. In the present study, a ternary composite system with an improved energy storage property is reported. The ternary composite was composed of PP-graft-AA chains (acrylic acid grafting) and a PP/nano-ZrO2 matrix and was biaxially oriented into a defect-free film with a thickness of 10 μm. The obtained film (BO(PP/AA/Zr)) exhibited an energy storage density of 7.9 J cm−3 at room temperature and maintained a considerably high value of 3.9 J cm−3 at 120 °C. The characterization of charge carrier transportation indicated that the effective biaxial orientation and the introduction of the polar grafted functional group and nanofillers increased the activation energy of molecular chain segment motion and deepened electron trap energy levels, which limited the transportation of charge carriers and significantly enhanced the breakdown strength and energy storage property. Moreover, the designed graft-modified chains (acrylic acid grafted) modified the compatibility between the polymer and inorganic nanofiller, thereby improving the processibility of the defect-free thin film. The results of dynamic mechanical analysis and 2D micro-infrared spectra indicated that the graft-modified chains offset the increased elastic rigidity caused by nanoparticles and facilitated the interaction between inorganic nano-ZrO2 and polymer chains. The study provides a potential solution to the challenge that nanocomposites face during the commercial production of defect-free biaxially oriented films.
研究领域:
材料科学
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聚合物纳米复合材料
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介电储能
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电气工程
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高影响因子
Journal of Energy Chemistry
·
2026
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IF 15.6
Junqing Zhang,Yachao Zeng,Gong Zhang,Jia Yu,Hui Gao,Xiaowei Du,Yangning Zhang,Tuo Wang,Peng Zhang,Jinlong Gong
Electrolysis of (bi)carbonates into valuable chemicals using renewable electricity is an attractive strategy to integrate CO 2 capture and valorization systems for reducing carbon emissions. Optimizing the proton concentration on the catalyst surface in (bi)carbonate electrolyzers can enable rapid local CO 2 release, making it a promising approach for enhancing electrocatalytic performance. This paper describes an efficient surface modification strategy using organic molecules with low p K a values to facilitate the accumulation of protons near the electrode. Operando Raman results prove that the modifier could promote pH swinging and increase the local CO 2 concentration. Consequently, when operated at a current density of 100 mA cm −2 , the acid-modified catalyst exhibited a CO Faradaic efficiency of 60%, higher than that of the base-modified catalyst, producing syngas with a CO/H 2 ratio of 0.5 at the cell voltage of 3.3 V. The proposed method offers promising new solutions for the development of commercially relevant integrated CO 2 reduction systems.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Changhong Yang,Yajie Han,Jin Qian,Panpan Lv,Xiujuan Lin,Shifeng Huang,Zhenxiang Cheng
A recent hot-spot topic for flexible and wearable devices involves high-performance nonvolatile ferroelectric memories operating under compressive or tensile mechanical deformations. This work presents the direct fabrication of a flexible (Mn,Ti)-codoped multiferroic BiFeO3 film capacitor with Pt bottom and Au top electrodes on mica substrate. The fabricated polycrystalline Bi(Fe0.93Mn0.05Ti0.02)O3 film on mica exhibits superior ferroelectric switching behavior with robust saturated polarization (Ps ∼ 93 μC/cm2) and remanent polarization (Pr ∼ 66 μC/cm2) and excellent frequency stability (1–50 kHz) and temperature resistance (25–200 °C), as well as reliable long-lifetime operation. More saliently, it can be safely bent to a small radius of curvature, as low as 2 mm, or go through repeated compressive/tensile mechanical flexing for 103 bending times at 4 mm radius without any obvious deterioration in polarization, retention time at 105 s, or fatigue resistance after 109 switching cycles. These findings demonstrate a novel route to designing flexible BiFeO3-based ferroelectric memories for information storage and data processing, with promising applications in next-generation smart electronics.
研究领域:
材料科学
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电子器件
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铁电学
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柔性电子学
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非易失性存储器
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
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IF 6.371
Xiao-Di Tang,Yi-yang Wang,Chao-Yang Wang,Lei Yuan,Yong Yi
Platinum-containing multimetallic catalysts supported on carbon materials have become one of the main choices for direct ethanol fuel cells (DEFCs) due to their high catalytic activity for the ethanol oxidation reaction (EOR). In this study, a platinum-bismuth alloy catalyst (PtBi@CA) with uniform distribution and small particles was provided by a one-step reduction method without the addition of structure directing agents and stabilizers . In the half-cell test, PtBi@CA(50−50) with the smallest crystallite size has high peak current density and pseudo-steady current density of 64.336 mA/cm 2 and 0.096 mA/cm 2 , respectively, which is 11.22 times and 1.85 times the high of the most advanced commercial carbon-supported platinum catalysts (Pt/C). The method is simple and feasible, greatly reduces the amounts of precious metals, and has broad application prospects in the synthesis of anode electrocatalysts for direct ethanol fuel cells.
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