ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Liangwei Hu,Wenhao Xie,Han Tang,Xiaolong Sun,Muyang Huang,Xiaolu Zhu,Yineng Gou,Weishuai Wang,Yun Zheng,Yue Hou,Guoqiang Wu,Ady Suwardi,Ziyu Wang
Decoupling electronic and phononic transport requires nanoscale control over scattering landscapes. Here, we show that direct ink writing generates a hierarchical nanoarchitecture in Bi 2 Te 3 , which comprises nanopores (10-150 nm), amorphous-crystalline nanointerfaces, and dense grain boundary networks that suppress lattice thermal conductivity by around 50% from ∼0.6 W m −1 K −1 to ∼0.3 W m −1 K −1 , as quantitatively confirmed by Debye-Callaway modeling. Sb/Te/Se co-enrichment (Sb/Te co-enrichment was applied to the p -type BST system, while Te/Se co-enrichment was applied to the n -type BTS system) refines this nanopore distribution while driving atomic-scale intercalation of Sb/Te enrichment between quintuple layers, as directly visualized by atomic-resolution STEM-EDS, bridging van der Waals gaps to selectively restore electrical conductivity without compromising phonon scattering. The optimized p -type and n -type materials achieve peak ZT values of 0.87 (303 K) and 0.89 (423 K), respectively, which exceed commercial Bi 2 Te 3 performance. Single-leg generators deliver conversion efficiencies of 3.51% and 2.53%, ranking among the highest for additively manufactured thermoelectrics. This work demonstrates that process-generated nanoarchitectures, combined with atomic-scale compositional engineering, enable effective phonon–electron decoupling in printed thermoelectric materials.
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Science China-Materials
·
2026
·
IF 7.7
Xue Chengyuan,Li Ye,Sun Weiyu,Li Jiade,Guo Jiandong,Zhu Xuetao,Tan Congwei,Peng Hailin
Two-dimensional (2D) semiconductor Bi 2 O 2 Se has emerged as a promising channel material in post-Moore transistors. To realize its potential for industrial applications, a facile and reliable synthesis method for large-area, uniform, single-crystalline Bi 2 O 2 Se films on industrially compatible substrates is highly desired. However, existing approaches typically rely on solid-source evaporation, which suffers from poor precursor volatility and irreproducible mass transfer. Moreover, the epitaxial growth of 2D Bi 2 O 2 Se has been predominantly confined to non-scalable substrates such as perovskite oxides or mica. Here we report a metal-organic chemical vapor deposition (MOCVD) route to high-quality, single-crystalline Bi 2 O 2 Se films grown directly on industrially compatible r -plane sapphire. By employing triphenylbismuth and elemental selenium as volatile precursors, we achieve uniform and reproducible 2D film growth. Field-effect transistors fabricated from these films exhibit outstanding electrical performance, with an on/off ratio exceeding 10 5 , and the highest mobility of ∼228 cm 2 V −1 s −1 .
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JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2026
·Vol. 56
·期 8
·150
·
IF 3.7
Ji Shiyu,Yang Kaihe,Guo Xiaoyuan,Zhao Shiqin,Zhang Ao,Xu Chenxuan
Ru-based catalysts represent promising Pt alternatives due to their decent hydrogen adsorption energy and cost advantages. However, their practical application is hindered by sluggish hydrogen evolution reaction (HER) kinetics and insufficient active site exposure in alkaline media. Herein, this work innovatively developed rapid solventless microwave heating method to synthesize small-size ruthenium selenide (RuSe 2 ) nanoparticles loaded on the carbon nanotube (CNT) surface. This microwave reaction accomplishes ultrafast transformation (100 s) to generate RuSe 2 nanoparticles (~ 3 nm in diameter), representing one of the fastest synthetic routes for transition metal selenides. By benchmarking the HER activity, RuSe 2 @CNT exhibits excellent activity in 1.0 M KOH, requiring an overpotential of 26 mV to achieve 10 mA cm − 2 , which is better than Ru@CNT (63 mV) and the commercial Pt/C (33 mV). Moreover, RuSe 2 @CNT exhibits outstanding HER activity with an overpotential of merely 66 mV at 10 mA cm − 2 , while demonstrating remarkable stability in natural alkaline seawater media. The demonstrated microwave selenization mechanism opens new possibilities for engineering ultrafine metal chalcogenides for marine energy applications.
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Journal of the American Chemical Society
·
2026
·Vol. 148
·期 31
·33295-33303
·
IF 16.6
Liu Shilong,Pan Yanan,Ding Fei,Sun Huaze,Guo Shuxin,Jiao Wenbiao,Liu Haining,Qin Lihao,Wang Changping,Yang Ye,Kang Baolei,Li Qiang
Layered van der Waals magnetic materials exhibiting half-metallicity
represent promising platforms for spintronic applications. The transition-metal
phosphorus trichalcogenide MnPSe 3 has been theoretically
predicted to host an intrinsic ferromagnetic half-metallic state in
its monolayer under sufficient carrier doping. However, realizing
experimentally accessible half-metallicity in this system poses a
great challenge, as the controversy over the magnetic state of organic-ion-intercalated
MnPSe 3 crystals, which are commonly regarded as doped monolayers,
remains unresolved. Here, we resolve this controversy by identifying
a canted antiferromagnetic ground state in pyrrolidinium-intercalated
MnPSe 3 , which originates from the combined effects of competition
between direct Mn–Mn antiferromagnetic exchange and Mn–Se–Mn
ferromagnetic superexchange, as well as enhanced single-ion anisotropy.
X-ray photoelectron spectroscopy and X-ray absorption near-edge structure
reveal multiple charge transfer pathways that lead to frustrated charge
redistribution, diminishing the enhancement of ferromagnetic superexchange
and yielding balanced competing interactions. First-principles calculations
further validate that this canted antiferromagnetic state is an intermediate
phase during the doping-driven antiferromagnetic-to-ferromagnetic
transition. Our work not only clarifies the longstanding magnetic
state controversy but also advances mechanistic understanding of charge
transfer in this system, paving the way for the rational design of
half-metallic van der Waals magnets toward practical spintronic devices.
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PubMed
高影响因子
ACS Nano
·
2026
·Vol. 20
·期 32
·22823-22837
·
IF 17.3
Zhu Wanli,Zhen Weili,Niu Rui,Miao Weiting,Meng Xiangmin,Zhu Wenka,Zhou Jianhui,Xia Jing,Wang Yongjian,Zhang Changjin
Bismuth-based
chalcohalides are emerging as a promising family
of materials for optoelectronics due to their intrinsically anisotropic
optical and electronic properties. However, the lack of high-quality
crystals has hindered access to their intrinsic physical properties.
Here, we present the synthesis and comprehensive optoelectronic characterization
of quasi-one-dimensional (1D) van der Waals (vdW) BiSeBr crystals.
This work establishes a previously unreported synergy, the coexistence
of ferroelectricity and self-trapped excitons (STEs) in a single quasi-1D
semiconductor, and its exploitation for multifunctional polarization-sensitive
photodetection. The low-dimensional chain structure of BiSeBr breaks
inversion symmetry, giving rise to out-of-plane ferroelectric behavior
and a second-harmonic generation signal. This symmetry breaking, together
with strong electron–phonon coupling, promotes the formation
of self-trapped excitons. The wavelength-dependent linear dichroism
reversal phenomenon reflects a k -space rotation of
the dominant transition dipole moment orientation, a general feature
of low-symmetry semiconductors that is further enhanced here by the
ferroelectric structural distortion. The BiSeBr nanowire photodetector
translates these physical mechanisms into device functionality. It
exhibits broadband photoresponse from ultraviolet to near-infrared
(350 to 1060 nm), with a responsivity of 2.4 × 10 4 A W –1 , a specific detectivity of 3.3 × 10 13 Jones, and a fast response time of 389 μs. The detector
resolves a clear polarization sensitivity reversal between the visible
and near-infrared regions. These results establish BiSeBr as a platform
for broadband polarization-sensitive photodetection in which multifunctionality
is not achieved by stacking disparate materials, but emerges from
the intrinsic synergy between ferroelectricity and strong electron–phonon
coupling within a single quasi-one-dimensional vdW crystal.
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高影响因子
ACS Applied Nano Materials
·
2026
·Vol. 9
·期 28
·13467-13476
·
IF 5.8
Dong Zihui,Chen Jiaxu,Tian Jiayi,Chen Biao,Liu Enzuo,Shi Chunsheng,Kang Jianli,Tang Ying,Qin Hongye,Ma Liying
In
recent years, the magnetic field utilization has emerged
as
an effective approach to enhance the oxygen evolution reaction (OER)
performance of catalysts through the magneto-thermal effect, magneto-hydrodynamic
effect, and spin-polarization effect. The OER process can be influenced
by controlling the spin state of intermediates in the spin-polarization
effect. Moreover, selenides with abundant d-electrons, high polarizabilities,
and metallicity properties render them highly suitable for the application
in OER. Medium-entropy compounds exhibit characteristics of outstanding
catalytic activity, structural stability, cocktail effect, etc. Herein,
due to the intrinsic correlation between the magnetic enhancement
effect and spin-dependent dynamics, the medium-entropy selenide FeCoNiVSe x nanosheet array catalyst exhibits a 317
mV overpotential and 40 h stability at 100 mA cm –2 current density in the presence of a 75 mT magnetic field. The spin-popularization
effect, whereby the magnetic field instigates a conversion of spin
states between the radical singlet and triplet states, can optimize
the reaction pathway, enhance the reaction efficiency, and exhibit
the persistent magnetic enhancement of FeCoNiVSe x . This work provides valuable insights into the mechanism of
understanding of magnetic field-assisted OER processes.
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CHEMISTRY OF MATERIALS
·
2026
·Vol. 38
·期 14
·7286-7297
·
IF 7.1
Wang Shaoqin,Fu Qingqiao,Zhao Fan,Li Yang,Zhang Jiye,Luo Jun
The nominal compounds GeBi 4 X 7 and GeBi 6 X 10 ( X = Se, Te) exhibit pronounced cation disorder, posing challenges
in achieving single-phase materials at their nominal stoichiometries
and thereby complicating functional optimization. In this work, through
controlled cation composition regulation, we successfully synthesize
single-phase compounds derived from nominal GeBi 4 Te 7 and GeBi 6 Te 10 , eliminating the secondary
phases previously reported in these compounds. The actual stoichiometries
of these single phases are determined to be Ge 0.75 Bi 4.25 Te 7 and Ge 0.65 Bi 6.35 Te 10 , respectively. Additionally, two isostructural single-phase
compounds are discovered in the Se-based counterparts, with actual
compositions of Ge 0.72 Bi 4.28 Se 7 and
Ge 0.62 Bi 6.38 Se 10 . Rietveld refinement
analyses reveal that the cation layers adjacent to the van der Waals
gaps are preferentially occupied by Bi, whereas cation disorder predominantly
arises in the central mixed-cation layer within the GeBi 2 X 4 stack. This layer-selective preference,
combined with cation disorder enabled by the nearly identical electronegativities
of Ge and Bi, drives the overall stoichiometry toward the Bi-rich
regime. With respect to thermoelectric properties, the complex-stacking
single-phase materials derived from nominal GeBi 4 X 7 and GeBi 6 X 10 show distinct advantages over the simple-stacking GeBi 2 X 4 counterparts and conventional
Bi 2 X 3 matrices. Experimental
results indicate that the incorporation of additional Bi 2 X 3 stacks markedly enhances phonon scattering
and reduces the lattice thermal conductivity, while exerting minimal
impact on carrier mobility. Of particular significance, the single-phase
material Ge 0.65 Bi 6.35 Te 10 derived
from nominal GeBi 6 Te 10 achieves a remarkably
low lattice thermal conductivity of ∼0.35 W m –1 K –1 and a dimensionless thermoelectric figure
of merit of ∼0.62 at 525 K. Predictions based on the single
parabolic band model indicate a substantial potential for improving
the thermoelectric performance of Ge 0.65 Bi 6.35 Te 10 through the optimization of carrier concentration,
suggesting that this compound represents a promising alternative to
the traditional Bi 2 Te 3 matrix.
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ACS Catalysis
·
2026
·Vol. 16
·期 15
·14434-14449
·
IF 13.6
He Tianli,Chen Haoxi,Li Senyuan,Jin Yanshuo,Yu Xiang,Huang Wenyu,Xie Fangyan,Chen Jian,Pan Dingjie,Wang Nan,Meng Hui,Chen Shaowei
Oxidation of 5-hydroxymethylfurfural (HMF) has been proposed as a promising alternative to the oxygen evolution reaction to enhance hydrogen production in alkaline media. However, the mechanistic understanding of the HMF oxidation reaction (HMFOR) has remained limited. In this study, CoSe 2 -Cu 2−x Se heterostructure composites are synthesized via a two-step hydrothermal method using cobalt(II) acetate, cupric acetate, and selenium powders as the starting materials, and the sample with a 0.4 mmol initial feed of cupric acetate stands out as the best HMFOR catalyst among the series, achieving a current density of 10 mA cm −2 at a potential of +1.265 V vs RHE and a 97% Faradaic efficiency for the production of 2,5-furandicarboxylic acid at +1.5 V vs RHE. The catalytic activity is attributed to the lattice oxygen within the amorphous hydroxyl oxide layer formed via surface reconstruction of the catalyst, which can directly and indirectly participate in HMFOR during the indirect oxidation of CoOOH/CoO 2 . Such a lattice oxygen-mediated indirect oxidation mechanism of CoOOH/CoO 2 is supported by in situ spectroscopic characterizations, 18 O-isotope labeling experiments, and density functional theory calculations. The findings of this work provide new insights into the electro-oxidation of small organic molecules, an important process for advancing electrochemical energy technologies.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Yonghong Lu,Siping Li,Zhi Li,Zhaodi Wang,Huilong Song,Zhifang Chen,Yangyang Chen,Gangyong Li,Zhaohui Hou
A dual-protection strategy suppresses polyselenide shuttling and volume expansion for stable Al batteries. • Cu 2 Se/CoSe 2 heterointerfaces accelerate redox kinetics and optimize electronic structure for Al storage. • Hollow carbon nanotubes buffer mechanical strain and confine active species during cycling. • Achieving 274.2 mAh g −1 over 1000 cycles and high-rate performance up to 3.2 A g −1 . Transition metal selenides (TMSs) hold great promise as high-capacity cathode materials for rechargeable aluminum batteries (RABs) owing to their cost-effectiveness and favorable redox activity. However, their practical implementation is severely plagued by the structural collapse induced by volume expansion and the rapid capacity decay caused by polyselenide dissolution in acidic ionic liquid electrolytes. Herein, a dual-protection strategy is proposed by rationally constructing a hollow nitrogen-doped carbon nanotube-encapsulated Cu 2 Se/CoSe 2 heterostructure (NC@Cu 2 Se/CoSe 2 ), coupled with an acetylene black-modified separator (AB/GF/A). In this integrated architecture, the hollow conductive carbon skeleton physically confines the active species and buffers mechanical strain, while the bimetallic selenide heterojunction accelerates reaction kinetics. Synergistically, the functionalized separator further suppresses the shuttle effect by intercepting dissolved species. Benefiting from these multidimensional merits, the assembled RABs manifest superior electrochemical performance, delivering a high reversible capacity of 274.2 mAh g −1 after 1000 cycles at 1.0 A g −1 , and 250 mAh g −1 at a high rate of 3.2 A g −1 . This work offers a comprehensive perspective on integrating heterostructure engineering with separator modification to unlock the potential of advanced RABs. Download: Download high-res image (197KB) Download: Download full-size image A hollow N-doped carbon-encapsulated Cu 2 Se/CoSe 2 heterostructure is developed as a high-capacity cathode for rechargeable aluminum batteries. The integrated design, featuring an internal bimetallic selenide heterojunction and an acetylene black-modified separator, effectively buffers volume expansion and suppresses the shuttle effect of dissolved species, enabling exceptional cycling stability and rate capability.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Wenqing Wang,Fan Wu,Hao Li,Jianming Pan
A photocatalytic self-propelled nanomotor adsorbent was developed for Pd(II) recovery. • Self-propulsion overcomes diffusion-limited adsorption kinetics. • EPR reveals the ROS-mediated mechanism of long-term propulsion. • Selective Pd(II) recovery is achieved in complex acidic wastewater. The recovery of palladium (Pd) from complex acidic industrial wastewater is severely restricted by sluggish interfacial mass transfer and inherent diffusion-limited adsorption kinetics. To address this long-standing bottleneck, asymmetric N/Se-codoped resorcinol-formaldehyde nanomotors (Se-RF@NMs) were rationally fabricated via an emulsion-confined anisotropic growth strategy for photocatalytic self-propulsion-boosted Pd(II) recovey. Under light irradiation, the photoresponsive resin framework enables continuous in-situ H 2 O 2 generation. Meanwhile, the adsorption-induced in-situ reduction of Pd(II) further accelerates catalytic H 2 O 2 decomposition to generate oxygen microbubbles, endowing nanomotors with sustainable autonomous motion and dynamically promoting interfacial ion transport. EPR characterization confirms that photogenerated holes and reactive oxygen species sustain the cyclic H 2 O 2 generation-decomposition system, effectively stabilizing the self-propulsion behavior of Se-RF@NMs. Benefiting from the synergistic coupling of photocatalytic self-propulsion and N/Se-based selective coordination adsorption, the optimized Se-RF@NMs achieve a superior Pd(II) adsorption capacity of 196.75 mg g −1 , as well as excellent selectivity in multi-metal competitive systems and practical industrial wastewater matrices. This work elucidates a photocatalysis-driven active mass transfer enhancement mechanism, establishing a feasible paradigm to break the intrinsic diffusion limitation of conventional adsorption. It provides new insights into the rational design of intelligent self-propelled catalytic adsorbents for high-efficiency precious metal recovery in complex and harsh water environments. Download: Download high-res image (152KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Qianwei Chen,Li Ma,Xingyu Bai,Jieyu Zhang,Dongyu Wang,Ke Ning,Yanmou Shao,Hui Chai,Shu-Juan Bao,Longcheng Zhang
Cu 2 O@RuSe 2 nanowire arrays enable ampere-level alkaline HER via multiscale catalyst design. • RuSe 2 weakens OH* adsorption and reconstructs interfacial water, accelerating alkaline HER kinetics. • Optimized bubble detachment and reduced bubble size enhance gas–liquid–solid mass transfer at high currents. Efficient alkaline hydrogen evolution at industrially relevant current densities is limited by sluggish reaction kinetics and inefficient interfacial mass transfer. Here we report a Cu 2 O@RuSe 2 nanowire architecture that couples active-site electronic modulation with electrode-level bubble management. The catalyst delivers an overpotential of 0.26 V at 500 mA cm −2 and retains 96.3% of its initial current density during continuous electrolysis at 1 A cm −2 for more than 260 h. Density functional theory calculations show that RuSe 2 modification weakens OH* adsorption while preserving favorable H* binding, thereby alleviating Volmer-step limitations under alkaline conditions. In situ Raman spectroscopy further reveals a more ordered interfacial water structure on Cu 2 O@RuSe 2 NWs, which promotes water activation. At the electrode scale, Cu 2 O@RuSe 2 enables faster bubble detachment and a narrower bubble-size distribution, improving gas-liquid-solid mass transfer. These results demonstrate that integrating electronic regulation of catalytic sites with bubble-management engineering is an effective strategy for achieving efficient and stable alkaline hydrogen evolution at industrially relevant current densities. Efficient alkaline hydrogen evolution at industrial current densities is limited by sluggish interfacial kinetics and inefficient bubble release. Herein, we construct a Cu 2 O@RuSe 2 nanowire-array electrode that synergistically integrates electronic modulation with bubble management. The introduction of RuSe 2 optimizes the adsorption energy of key *OH intermediates, accelerates interfacial water dissociation, and suppresses OH poisoning, thereby enhancing HER kinetics. Simultaneously, the nanowire architecture promotes rapid bubble detachment and efficient gas–liquid–solid mass transfer under high-current operation. As a result, the catalyst delivers a low overpotential of 0.26 V at 500 mA cm −2 and maintains stable electrolysis at 1 A cm −2 for over 260 h with 96.3% current retention. Download: Download high-res image (335KB) Download: Download full-size image
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Pengfei Tian,Yunan Shen,Yuzhe Hua,Xiyu Zou,Guangmin Ren,Qingjie Guo,Hongjing Tian
Mo vacancy (V Mo ) and Se vacancy (V Se ) are doped into Bi 2 MoO 6 (BMO) and ZnSe, respectively, while they are mechanically ground and mixed to fabricate the dual S-scheme heterojunction. The lattice distortion is observed at the interface between V Mo -BMO and V Se -ZnSe/CdSe (V Se -ZCS) while XPS results confirm the construction of the dual S-scheme heterojunction V Mo -BMO/V Se -ZCS (V Mo+Se -BZCS). DFT simulation demonstrate that the doping of V Mo and V Se lead to more electrons transferring spontaneously through the heterojunction interfaces and promote the IEF strength accordingly. Both in-situ XPS and fs-TAS characterization prove the presence of a fast photoinduced charge transfer pathway from V Mo -BMO to V Se -ZnSe under LED light irradiation. V Mo and V Se function as the holes trapping center in V Mo -BMO and the electron trapping center in V Se -ZCS, respectively, thereby effectively suppressing the electron-hole recombination, which enhances the redox capability of V Mo+Se -BZCS together with the fast charge transferring. During the photocatalytic degradation experiments for the wastewater containing both tetracycline (TC) and Cr(VI), both the TC and the Cr(VI) degradation efficiency of V Mo+Se -BZCS are competitive under either LED or xenon lamp irradiation in comparison with some reported catalysts. Dual doping of V Mo and V Se were testified to amplify the bi-directional promotion effects (BPEs) between TC and Cr(VI).
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危险品化学品经营许可证（带存储）