INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Zhaoying Yang,Xinge Wu,Gaowu Qin,Xiangying Meng
FeCo-N-C is considered a promising electrode material for hydrogen fuel cells. However, its oxygen reduction reaction (ORR) performance is limited by the strong adsorption of intermediates. In this work, we regulated the adsorption of “metal-intermediates” by modulating the interaction between the metal and support. The sulfur atoms were introduced to modify the periphery of the M-N x sites, and an atom-dispersed bimetallic site micro-mesoporous catalyst (FeCo-SN-C) was synthesized. The S dopant enhances the bonding between the metal catalytic sites and the support, which weakens the adsorption of ORR intermediates on catalytic sites, resulting in exceptional stability and ORR activity of the catalyst. ORR tests showed that FeCo-SN-C in 0.1 M KOH exhibited superior half-wave potential (0.863 V vs. RHE), which outperformed Pt/C (0.833 V), along with high stability and methanol tolerance. Theoretical calculations demonstrated that the doping of S effectively shifted the 3d electron orbital of the Fe site to a deeper level, optimized the adsorption and desorption energy barriers of the key oxygen-containing intermediate (∗OH), and promoted the ORR. Additionally, the Zn-air batteries based on FeCo-SN-C exhibited excellent discharge performance and durability. This study provides insights and solutions for the rational design of TM-N-C catalysts to enhance their activity and stability.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ayyakannu Sundaram Ganeshraja,Kaixin Zhu,Kiyoshi Nomura,Junhu Wang
The hierarchical silver chloride loaded tin-doped titania (AgCl@Sn-TiO 2 ) microspheres were first time prepared by a hydrothermal method and annealing at different temperatures. The catalyst showed the enhanced visible light photocatalytic activity as compared to the plasmonic photocatalysts of AgCl and Ag/AgCl, and commercial Degussa P25 (TiO 2 ). The improved efficiency is considered to local surface plasmonic resonance (AgCl could reduce to Ag 0 during photocatalytic reaction) in enhanced broad band visible light absorption in addition to the characteristics of heterojunction between Sn-TiO 2 and AgCl NPs. Moreover, the surface and bulk properties of as-synthesized samples were analyzed by 119 Sn Mössbauer spectroscopy. The magnetic property of the bulk was studied as a function of magnetic field with different temperatures. These results signify the clear details of the magnetic and visible light photocatalytic activities of hierarchical AgCl@Sn-TiO 2 microspheres.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Biobased Materials and Bioenergy
·
2017
·Vol. 11
·期 6
·562-567
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IF 0.975
Wang Lan-Ying,Zhuang Jun-Ping,Yu Kai-Rong,Wu Shu-Bin
Sn-Beta zeolite is a promising catalysts for isomerization of glucose to fructose, which is a key step in the conversion of biomass to various platform chemicals. Herein, Sn-Beta-H zeolite was efficiently prepared via hydrothermal synthesis by using Al-Beta. Finally, the product was
heated to 423 K for 48 h then calcined at 550 °C for 6 h to obtain Sn-Beta-H sample. The results of XRD patterns confirmed that the prepared catalyst had both microporous and mesoporous; N2 sorption isotherms showed that the main pore size centered at around 3.5 nm; TD-DTG revealed
that the Sn-Beta-H zeolite had good thermal stability with the peaks on the DTG curves was 283 °C; FTIR and UV-Vis spectra also successfully indicated that tin substitution into the zeolite framework. The effects of various reaction conditions including reaction temperature, reaction time
and the amount of catalyst on glucose conversion and fructose yield and selectivity were investigated. Under optimized operating conditions, 10% glucose solution in 40 ml water, catalyst (4 g), at 120 °C for 2 h, resulting in fructose yield of 30.8% and selectivity of 61.3%. Moreover,
Sn-Beta-H zeolite could be easily recovered and efficiently reused without significant loss in its catalytic activity.
研究领域:
催化化学
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生物质转化
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材料科学
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 17
·9135-9147
·
IF 3.917
Zhou Shengqiang,Yang Xiaomei,Zhang Yali,Jiang Lingyun,Zhou Lipeng,Lu Tianliang,Su Yunlai
Abstract One-pot conversion of cellulose to valued-added platform chemicals such as alkyl levulinate is a promising and challenging process of biomass utilization due to the insolubility of cellulose in alcohol. In this work, commercial heteropoly acid combined with postsynthesized Sn-Beta zeolite was employed to transform cellulose to methyl levulinate (MLE) in one pot. The synergistic catalysis of the homogeneous strong Brønsted (B) acid and the solid strong Lewis (L) acid can effectively realize the depolymerization of solid cellulose and the subsequent isomerization, dehydration and hydration steps to MLE. 55% and 62% of MLE yields were obtained from α-cellulose and microcrystalline cellulose, respectively, at 160 °C for 10 h. Various carbohydrates besides cellulose can also be efficiently converted to MLE in high yields over the bifunctional catalyst system. The effects of the amount of B acid and L acid, the reaction temperature and time and the amount of cellulose on the production of MLE were investigated in detail. Finally, the reaction pathway of cellulose to MLE was revealed. Recyclability tests indicated that the binary catalyst can be reused without decrease of catalytic activity. Graphic abstract
研究领域:
生物质化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Shengqiang Zhou,Lipeng Zhou,Yunlai Su,Xiaomei Yang,Hao He
Sn-Beta zeolite is a promising heterogeneous Lewis acid catalyst. Hydrothermal synthesis of Sn-Beta(TEOS) using tetraethyl orthosilicate (TEOS) as silica source is a classical method. However, the hydrolysis of TEOS generates considerable ethanol, which is unfavorable for scalable production of Sn-Beta. Herein, cheap fumed silica and silica sol were used as Si sources to synthesize Sn-Beta and compared with that synthesized from TEOS . The crystalline phase, morphology, physicochemical properties, and the state of Sn were characterized. It was found that Sn-Beta can be successfully prepared with fumed silica and silica sol as well as TEOS as silica source. Sn was introduced into the framework of these samples. Sn-Beta synthesized from fumed silica (Sn-Beta(FS)) and silica sol (Sn-Beta(Sol)) had similar crystallization behavior and full crystallization time as well as morphology, crystal size with that from TEOS. Sn-Beta(Sol) has less silanols and lowest ratio of open/closed tin site among these samples. It exhibited higher catalytic activity for the conversion of glucose to methyl lactate and lower catalytic activity for the isomerization of glucose as compared with the other two samples. Sn-Beta(FS) showed similar catalytic performance in the studied reactions with Sn-Beta(TEOS).
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Jian Zhang,Liang Wang,Guoxiong Wang,Fang Chen,Jie Zhu,Chengtao Wang,Chaoqun Bian,Shuxiang Pan,Feng-Shou Xiao
Enhancing the yield of alkyl lactate from sugars is in great demand but challengeable to accomplish. Here we report a facile but efficient route to make this by employing a hierarchical and Sn-containing Beta zeolite (Sn-Beta-H). The hierarporosity in the Sn-Beta-H facilitates the conversion of sugars into important intermediates for producing alkyl lactate in the competition with undesirable side reactions, thus outperforming the conventional Sn-zeolite catalysts in yielding alkyl lactate from a wide scope of sugars. Particularly, the yield of alkyl lactate could reach as high as 72.1% from sucrose. Importantly, the Sn-Beta-H is stable and can be easily recycled for five times with constant catalytic performances.
研究领域:
化学工程
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催化科学
·
可再生资源转化
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 4
·1-13
·
IF 2.8
Li Yanmei,Hu Jin,Deng Zhongshan,Huang Huachao,Liu Zheng,Fu Jiaxin,Wang Kaijun,Wang Kaizhao,Feng Yongjin,Zhang Weijun
High-performance supercapacitors are essential for advancing energy storage devices, and superior active materials are crucial for this purpose. W 18 O 49 is recognized as a highly promising electrode material, such as in the form of nanowires and nanorods, for energy conversion and storage. However, it still faces challenges like low conductivity and insufficient active sites. The strategy of heteroatom doping has shown effectiveness, such as tin (Sn), which has potential for enhancing matrix performance, but it has not been explored for W 18 O 49 materials. Herein, a series of Sn-doped W 18 O 49 materials are carefully designed and synthesized using a straightforward one-pot solvent-thermal method in this study. Various analyses are conducted to confirm successful Sn doping and to observe structural changes with different Sn concentrations. The optimal material is identified as 3% Sn-W 18 O 49 , which displays a unique 3D sea urchin-like structure as observed via SEM and TEM. Furthermore, XRD peaks related to SnO impurities are noted at higher Sn doping levels, such as 5% and 7% Sn-W 18 O 49 . Electrochemical testing reveals a high specific capacitance of 546 F∙g −1 at 4 A∙g −1 for the 3% Sn-W 18 O 49 electrode, alongside excellent long-term cycling stability with an 86% capacitance retention after 6000 GCD cycles. The enhanced performance is attributed to the improved electrical conductivity, surface area, and active sites of the W 18 O 49 through optimal Sn doping. This research highlights the promising electrochemical properties of Sn-doped W 18 O 49 materials.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 21
·7408-7414
·
IF 3.842
Hao Wei,Shangzhi Chen,Xinglong Ren,Bingjian Qian,Yanjie Su,Zhi Yang,Yafei Zhang
We have reported that the Sn-doped PbSe nanocrystals could be synthesized via a facile solution-based method. Structural and optical characterizations were employed to investigate the properties of the nanocrystals. The x value could be altered across the entire range from 0.58 to 1 by modulating the ratio of cation precursor contents. The band gap energy of the Sn-doped PbSe nanocrystals could be tuned and changed in a nearly linearly way with respect to the x value. Furthermore, using oleylamine as the solvent promoted the nanocrystals to self-assemble as nano-flowers. The theoretical analysis based on first-principles calculations and density of states (DOS) in the VASP code demonstrates the validity of the experimentally obtained band gap variation and values. The band gap energy values at the edge of the solar spectrum render them as competitive candidates for solar applications.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Hongxiang Wu,Yibo Wang,Zhaoping Shi,Dongchen Han,Jiahao Yang,Pengbo Wang,Jing Ni,Meiling Xiao,Changpeng Liu,Wei Xing
The successful deployment of proton-exchange membrane water electrolyzers (PEMWEs) relies on the development of an active and durable electrocatalyst for the anodic oxygen evolution reaction (OER). Although rutile IrO2 shows excellent durability due to its stable crystal structure, it suffers from unsatisfactory activity. Here, we report a partial Sn substitution strategy to trigger lattice oxygen reactivity toward boosted OER. The similar crystal structures of IrO2 and SnO2 promote uniform incorporation of Sn into the lattice of IrO2, thus retaining the durability of the pristine rutile phase. More importantly, the electron transfer from Ir to Sn through the local structure of Ir–O–Sn was found to enhance the Ir–O bond covalency, which in turn activated the lattice oxygen to participate in OER. The enhanced lattice oxygen mechanism (LOM) was further verified by in situ 18O isotope labeling in situ differential electrochemical mass spectroscopy (DEMS). Due to these attributes, the as-designed Ir0.83Sn0.17O2 catalyst showed significantly improved performance, with an overpotential of only 284 mV at a current density of 10 mA cm–2, 38 mV lower than that of the commercial IrO2. In addition, the mass activity of the Ir0.83Sn0.17O2 catalyst reaches as high as 130 A gIr–1 at 1.55 V, which is 2.58 times higher than that of commercial IrO2. Beyond that, the intrinsic stability of the rutile phase endows the Ir0.83Sn0.17O2 catalyst with excellent operational durability. This work provides a novel insight into the improvement of catalyst activity and inspires the design of highly active and stable OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2022
·
IF 4.969
Zhiwei Wang,Mingqiang Cheng,Jiaojiao Bu,Lei Cheng,Juanjian Ru,Yixin Hua,Ding Wang
Tin is one of the vital substances in the material and chemical industry. Deep eutectic solvent (DES) possesses excellent physicochemical properties for metal preparation. In this study, the electrochemical behavior of Sn(II) and metallic tin preparation in choline chloride-ethylene glycol (ChCl-EG) DES were investigated. Linear sweep voltammetry is carried out to study the effects of substrate material (Ni, Cu, Pt, C, Fe, Al, W, glassy carbon (GC) and Ti), temperature (313–353 K) and SnCl 2 concentration (10–100 mM) on the electrochemical behavior of Sn(II)/Sn. Results demonstrate that metallic tin is easier to be prepared on the Ni electrode, and increasing temperature and SnCl 2 concentration both facilitate the reduction of Sn(II). Electrospray ionization mass spectrometry (ESI-MS) shows that the main form of Sn(II) is [SnCl 3 ] - . Chronoamperometric tests indicate that with the increase of applied potential, the nucleation of Sn(II) on the nickel electrode becomes close to the instantaneous nucleation. Simultaneously, the nucleation rate and the number of active sites on the electrode surface increase significantly. Pure tin with a dendritic structure could be prepared with higher current efficiency of 96.4% and lower energy consumption of 320.5 kW·h·t −1 without any additives. All these studies provide a fundamental basis for the preparation of tin powders in ChCl-EG DES.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 10
·2675-2681
·
IF 5.934
Wei Xu,Lingjun Kong,Hui Huang,Ming Zhong,Yingying Liu,Xian-He Bu
Sn-Based materials are attracting increasing attention for application in sodium-ion batteries (SIBs), due to the ultra-high theoretical capacity of pure Sn. However, low structural stability and poor rate capability restrict their further development. Herein, a facile method is reported to embed Sn nanocrystals into a TiO2/porous carbon (TiO2/C) composite by direct carbonization of a mixture of tetraphenyltin and a Ti-based metal–organic framework. The obtained cylinder-like Sn/TiO2/porous carbon (Sn/TiO2/C) composite is uniformly built from TiO2 nanoparticles, Sn nanocrystals and N-doped carbon. Importantly, pores, formed by the accumulation of nanoparticles, can effectively restrict the huge volume change of Sn during cycling. When evaluated as an anode in SIBs, the Sn/TiO2/C composite not only possessed amazing cycling stability (159.6 mA h g−1 at 1.0 A g−1 after 3000 cycles), but also exhibited excellent rate performance (172.3 mA h g−1 at 1.0 A g−1 and 114.0 mA h g−1 at 10.0 A g−1). These superior properties can be attributed to Sn nanocrystals which enhanced specific capacity and electrical conductivity, and the TiO2/C substrate which improved structural stability, facilitating charge transfer kinetics.
研究领域:
材料科学
·
能量存储
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Huiyong Yu,Mengyuan Gao,Gongke Wang,Yumin Liu
The widespread use of antibiotics such as tetracycline has led to significant risks to both environmental sustainability and public health due to their persistence in natural water systems. In this study, Sn-doped BiOI microspheres were successfully synthesized through a simple one-step hydrothermal method to achieve enhanced photodegradation of tetracycline in aqueous solution. After 40 min of visible light irradiation, the optimal Sn-doped BiOI photocatalyst exhibited an exceptional tetracycline degradation efficiency of 82.8 %, significantly surpassing the 56.0 % efficiency of pure BiOI. To understand the origins of the enhanced catalytic behavior, a series of characterization techniques, including XRD, SEM, XPS, UV–Vis DRS, PL, and electrochemical measurements, were performed to investigate the crystal structure, morphology, surface states, light absorption properties, and charge carrier recombination and separation dynamics of the catalysts. These analyses demonstrated that Sn doping substantially modified the microscopic structure, morphology, and optical properties of BiOI, thereby greatly improving its photocatalytic efficiency. Further analysis of Sn doping effects demonstrated significant enhancement in transport and separation of photocarriers within BiOI microspheres, thereby leading to substantially improved photocatalytic performance under visible light.
研究领域:
环境科学
·
材料化学
·
光催化
·
水处理
✓ 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）