Matter
·
2025
·
IF 17.5
Tingting Zhai,Xutao Gao,Hao Wang,Yaojia Cheng,Jingchi Gao,Jie Pan,Edmund C.M. Tse,Congxiao Shang,Zhengxiao Guo
Activity and stability are often inversely entwined in catalysis, especially for the water oxidation reaction (WOR) to generate hydrogen under acidic media. Here, we show that an ionic-mismatch-induced semi-crystalline Y 0.3 Ru 0.7 O 2 gives rise to exceptionally active and stable WOR performance. The mismatched ionic radii and valences between Y 3+ and Ru 4+ leads to a strongly bonded hybrid nanostructure of ultra-fine crystalline and amorphous domains. The short-range ordered structure also leads to a reduced adjacent distance, which facilitates a more efficient and stable dual-site coupling mechanism with an extremely low overpotential of 170 mV at 10 mA cm −2 and prolonged stability over 300 h in an acidic electrolyte. A proton-exchange-membrane (PEM) water electrolyzer loaded with the catalyst shows an outstanding performance with only 1.64 V to reach 1 A cm −2 and stable operation at 0.5 A cm −2 over 300 h, demonstrating its outstanding potential for practical applications in PEM electrolysis.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Yang Xia,Jiaojiao Li,Jun Zhang,Xiaozheng Zhou,Hui Huang,Xinping He,Yongping Gan,Zhen Xiao,Wenkui Zhang
The inferior electrochemical stability towards Li anode and relatively low ionic conductivity at room temperature of argyrodite Li 6 PS 5 Cl (LPSCl) electrolytes are the intractable challenges for all-solid-state lithium batteries (ASSLBs). Herein, in order to fully address the aforementioned issues, yttrium ion (Y 3+ ) employed as dopant is designed to substitute for P 5+ in LPSCl to boost the Li + mobility in electrolyte, as well as to ameliorate the interface stability to Li anode. By introducing appropriate Y 3+ dopant, the optimized LPSCl-0.02Y electrolyte exhibits high ionic conductivity of 3.3 × 10 −3 S cm −1 at 25 °C, which is 2 times higher than that of the pristine LPSCl (1.5 × 10 −3 S cm −1 ). Benefitting from the high ionic conductivity, LPSCl-0.02Y is endowed with superior inhibition ability of Li dendrite nucleation and growth from Li anode, thereby significantly enhancing the (electro)chemical interfacial stability. Impressively, LiNi 0.8 Co 0.1 Mn 0.1 O 2 /Li cell with LPSCl-0.02Y electrolyte delivers high initial discharge capacity (165 mA h g −1 at 0.05C), robust cycling stability (93 mA h g −1 after 100 cycles) and remarkable rate capability (130 mA h g −1 at 0.2C). This rationally designed Y-doped LPSCl electrolyte is highly expected to pave the road for the practical application of ASSLBs, and to deepen the understanding of aliovalent substitution mechanism.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
锂离子电池
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Abdul Manan,Siraj Khan,Atta Ullah,Arbab Safeer Ahmad,Yaseen Iqbal,Ibrahim Qazi,Amjad Ullah,Zhonghua Yao,Hanxing Liu,Hua Hao,Murad Ali Khan,Maqbool Ur Rehman
Bi 0.4806-x Yb x Na 0.4606 Ba 0.0588 Ti 0.98 Al 0.02 O 3 (x = 0.0, 0.005, 0.01, 0.05) ceramics were processed using a solid state sintering route. Highly dense microstructure with maximum apparent density was obtained for the composition of x = 0.005. The polarization versus electric field (P-E) loop got relatively slimmer and remnant polarization decreased with an increase in x content. A maximum recoverable energy density of 0.69 J/cm 3 at a DBS of 95 kV/cm was obtained at x = 0.005 with its dielectric constant satisfying the condition of Δε r /ε r200 ° C ≤ ±15 % in a working temperature range of 97–383 °C having <0.02 dielectric loss.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2012
·
IF 2.023
Zhengwen Yang,Jialun Zhu,Dong Yan,Hangjun Wu,Rongfei Wang,Zhiguo Song,Xue Yu,Yong Yang,Dacheng Zhou,Zhaoyi Yin,Jianbei Qiu
Upconversion inverse opal photonic crystals based on a luminescent matrix of Yb, Er co-doped Y 2 Ti 2 O 7 were synthesized, and their photoluminescence was investigated. By comparing the spectra of the inverse opals with that of the reference sample, the contribution of photonic band gap effect to the upconversion emission was observed in the Y 2 Ti 2 O 7 : Yb, Er inverse opals. Intensity of the green or red upconversion emission from Er 3+ was depressed when the overlapping between the photonic band-gap and Er 3+ ions emission band occurs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Cai Yi-Meng,Li Yang-Hua,Xiao Yi,Meyer Quentin,Sun Qian,Lai Wan-Jing,Zhao Shu-Wen,Li Jun,Zhang Lin-Jie,Wang Han,Lin Zhang,Luo Jun,Han Li-Li
Electrochemical nitrate reduction to NH 3 holds a great promise for N-upcycling in nature, while its sluggish reaction kinetics involved in both the stepwise deoxygenation and hydrogenation processes necessitates the development of bespoke catalysts with multi-site engineering. Herein, we report a hybrid catalyst composed of rare-earth (RE) yttrium (Y) single atoms and copper phosphide (Cu 3 P) nanoparticles loaded on N, P-doped carbon (Y SA -Cu 3 P/CNP) through a chelating and pyrolysis method. Owing to a synergistic contribution of Y single atoms and Cu 3 P nanoparticles, Y SA -Cu 3 P/CNP achieves an impressive NH 3 Faradaic efficiency (FE) of 92% at − 0.5 V(vs. RHE) and the highest NH 3 yield rate of 11.4 mg·h −1 ·cm −2 at − 0.6 V (vs. RHE) in an alkaline media, which surpass most of the reported electrocatalysts. The intricate reaction pathway has been explored by online differential electrochemical mass spectrometry (DEMS), and the synergistic effect between Y single atoms and Cu 3 P nanoparticles has been studied by in situ synchrotron X-ray absorption spectroscopy. Moreover, density-functional theory (DFT) calculations unveil that the high-efficiency nitrate reduction on Y SA -Cu 3 P/CNP is attributed to a reduced energy barrier of the rate-determining deoxygenation step coupled with the enhanced stabilization of active hydrogen favorable for the hydrogenation steps, thereby boosting the overall reaction rates. In addition, a prototype Zn-nitrate battery utilizing Y SA -Cu 3 P/CNP as the cathode is unveiled. This work not only elucidates the mechanism behind the enhanced catalytic performance but also paves the way for the future development of high-efficiency electrocatalysts through dual-site engineering. Graphical Abstract
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Ruobing Wang,Hongli Zheng,Changfu You,Haiming Wang
Chemical looping reforming of methane (CLRM) is a promising technology for syngas production, offering efficient utilization of CH 4 to generate syngas with a desirable H 2 /CO ratio for downstream applications. This study investigated the influence of Ni incorporation in Y-Fe-Al garnet-type oxygen carriers (OCs) in CLRM. The Ni 0.2 -Y-Fe-Al OC demonstrated a pronounced enhancement in performance compared to its undoped counterpart, elevating the methane conversion from 66.6 % to 98.4 % and increasing the syngas yield from 5.79 to 8.38 mmol g −1 at 850 °C. The incorporated Ni species introduced additional active sites for methane activation, enhanced surface basicity, and improved lattice oxygen mobility, which collectively facilitated the selective oxidation of methane to syngas, especially at low temperatures (<850 °C). Cyclic tests confirmed that Ni incorporation enhanced the redox stability and mitigated phase segregation, leading to sustained high reactivity over multiple cycles. In situ DRIFTS analysis verified that the fundamental reaction pathway, proceeding via the -CH 3 →-CH 2 →-CHO intermediates, remained unaltered after Ni addition. This work established that incorporating Ni in garnet-type OCs is an effective strategy for enhancing both redox activity and cyclic stability in CLRM systems.
研究领域:
材料科学
·
能源化学
·
催化化学
·
无机化学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Fengjie Chen,Ying Liang,Zejun Zhou,Ting Yu,Yunjun Mei,Zhen Zhou,Bolei Chen,Yong Liang,Yawei Wang
Strategies for the rapid and efficient removal of fluoridated industrial wastewater are currently lacking. Herein, monolayer calcium-doped layered yttrium hydroxide (Ca-Y LRH) was synthesized through formamide exfoliation, and its removal of fluoride reached equilibrium within 4 min. The adsorption kinetics fit the pseudo-second-order kinetic model with a faster adsorption rate (K F = 0.22 mg g −1 min −1 ), and the adsorption isotherm followed the Langmuir model with a maximum adsorption capacity of 483.33 mg g −1 . The interlayer chloride ions in the monolayer Ca-Y LRH were the main ligands for substituting fluoride, which inhibited the increase in pH and maintained the continuation of the fluoride removal process. Furthermore, the optimum fluoride removal performance of monolayer Ca-Y LRH was predicted by software-based multiparameter methods and was found to be useful for treating fluoridated industrial wastewater samples (858.17 or 8.72 mg L −1 ). These findings provide novel insights into the treatment of fluoridated industrial wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Cunhuai Yu,Wanling Xiao,Ji Huang,Chao Hao,Pei Kang Shen,Zhi Qun Tian
Developing transition metal-nitrogen-carbon (M N C) with the inert metal-atom center for the Fenton reaction is crucial to achieving precious metal-free electrocatalysis of oxygen reduction reaction (ORR). Herein, we report a new structure of Y N C nanosheets for efficient ORR, which was synthesized by pyrolyzing the Y ion-containing self-polymerized compound of 2, 4, 6-triaminopyrimidine (TAP) as a new precursor. Results demonstrate that the precursor of TAP with high N content is capable of forming atomically dispersed specific YN 4 O moieties anchoring in N -rich carbon nanosheets, exhibiting excellent ORR performance with a higher half-wave potential of 0.88 V and 0.78 V in 0.1 M KOH and 0.5 M H 2 SO 4 than Fe N C synthesized by the same strategy. Meanwhile, the zinc-air battery and proton exchange membrane fuel cell tests also verify its feasibility for practical application with a maximum power output density of 151 mW cm −2 and 496 mW cm −2 respectively. Theoretical calculations further reveal that the axial O coordination in YN 4 moiety causes an symmetry breaking of the d-orbital electrons of yttrium and weakens the spin polarization, which can shift the rate-limiting step from the *OH step to the *OOH step with a lower ORR overpotential than the classic Fe N C. This work proves that Y N C with single yttrium atom holds a great promise as a substitute for the conventional Fe N C with active Fenton effect as a none-precious metal ORR electrocatalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wei Xiang,Lijun Jia,Tingqing Cai,Xuening Han,Mingchao Yang,Huaiwu Zhang
To meet high-power microwave system demands, low-temperature sintered Bi-Li-V substituted YIG ferrites were prepared. The experimental results reveal that Bi 3+ , Li + , and V 5+ occupy the c, a, and d sites of the garnet structure, respectively; the full-site distortion reduces the lattice activation energy, significantly reducing the transformation temperature from perovskite to garnet phase. Additionally, a dual structure with a high percentage of fine grains is observed in the substituted samples, which is an important reason for the large increase in spin-wave linewidth. Isothermal thermodynamic analysis indicates that a sintering mechanism dominated by liquid-phase sintering is conducive to the densification of YIG ferrites. Ferromagnetic resonance linewidth decomposition confirms that, due to the simultaneous increase in the saturation magnetization and the magneto-crystalline anisotropy constant, anisotropy-induced linewidth remains almost unchanged; the dense dual structure leads to a significant reduction in porosity-induced linewidth; ultimately, the ferromagnetic resonance linewidth is greatly reduced.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Ziwen Xia,Weiye Yang,Hongyan Peng,Shihua Zhao
A B S T R A C T Photocatalysis is gaining increasing attention due to its potential applications in various fields and simple, environmentally friendly production technologies. In this study, hollow pencil-like Y 2 O 3 was synthesized using a hydrothermal method, and Cu 2 O was coated onto the surface of Y 2 O 3 through a chemical precipitation method, resulting in a hollow pencil-like Y 2 O 3 /Cu 2 O composite heterojunction structure. The hollow pencil-like morphology provides a larger specific surface area, and the inherent band offset facilitates the spatial separation of photogenerated carriers. The Y 2 O 3 /Cu 2 O composite material was used as a catalyst to degrade methyl orange (MO) under xenon lamp irradiation, achieving a degradation efficiency of over 95% within 2 hours. After five cycles, the photocatalytic efficiency remained above 80%, indicating that the material exhibits high photocatalytic activity and good stability. Moreover, studies demonstrate that the Y 2 O 3 /Cu 2 O composite material exhibits superior photocatalytic efficiency compared to Cu 2 O particles, providing valuable insights for future research in related fields.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·
IF 2.93
Ying Wang,Li Wang,Ning Gan,Zi-Yian Lim,Chunzheng Wu,Jun Peng,Wei Guo Wang
Ni/ x Y 2 O 3 –Al 2 O 3 ( x = 5, 10, 15, 20 wt%) catalysts were prepared by sequential impregnation synthesis. The catalytic performance for the autothermal reforming of methane was evaluated and compared with Ni/γ-Al 2 O 3 catalyst. The physicochemical properties of catalysts were characterized by X-ray diffraction (XRD), Transmission electron microscope (TEM), X-Ray Photoelectron Spectrometer (XPS), Thermo Gravimetric Analyzer (TGA) and H 2 -temperature programmed reduction techniques (TPR). The decrease of nickel particle size and the change of reducibility were found with Y modification. The CH 4 conversion increased with elevating levels of Y 2 O 3 from 5% to 10%, then decreased with Y content from 10% to 20%. Ni/ x Y 2 O 3 –Al 2 O 3 catalysts maintained high activity after 24 h on stream, while Ni/Al 2 O 3 had a significant deactivation. The characterization of spent catalysts indicated that the addition of Y retarded Ni sintering and decreased the amount of coke.
研究领域:
催化化学
·
能源材料
·
化学工程
·
无机功能材料
·
工业催化
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2025
·Vol. 22
·期 6
·e70052
·
IF 2.3
Na Zhang,Min Niu,Lei Su,De Lu,Kang Peng,Hongjie Wang
Si 3 N 4 ceramics stand out as ideal materials for advanced electronic packaging substrates due to their high mechanical strength, high-temperature resilience, and minimal dielectric constant. Optimizing both the mechanical and thermal conductivity is essential for ensuring their reliable performance. In this study, a systematic investigation into the impact of both oxygen-containing sintering additives (Y 2 O 3 -MgF 2 and Y 2 O 3 -MgSiN 2 ) and oxygen-free sintering additives (YF 3 -MgF 2 and YF 3 -MgSiN 2 ) on the microstructure, flexural strength, and thermal conductivity of Si 3 N 4 ceramics has been performed. It demonstrates that the Si 3 N 4 ceramic sintered with the YF 3 -MgSiN 2 additive achieves a remarkable thermal conductivity of 111.63 W·m −1 ·K −1 and a flexural strength of 774.7 MPa, which is relatively rare among the reported Si 3 N 4 ceramics. These exceptional properties are attributed to the use of YF 3 -MgSiN 2 additive, which leads to a significant reduction in lattice oxygen content, along with a decrease in the liquid phase formation temperature, thereby promoting grain development. Furthermore, the decomposition of MgSiN 2 at high temperatures plays a key role in purifying the grain boundaries. This study provides a promising approach for developing high-performance Si 3 N 4 ceramics with excellent thermal conductivity and mechanical strength.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）