FUEL
·
2025
·
IF 7.5
Lifang Cao,Pu Wang,Yuhan Tang,Hong Liu,Jiasheng Wang
Amorphous ZSM-5 was facilely synthesized by simply tuning the aqua ammonia amount and used as support of Mo-V-O for aerobic oxidation desulfurization. It was found that both geometric and electronic effects help to enhance the catalytic performance. Geometrically, the amorphous ZSM-5 could better disperse the metals due to its higher specific area. Electronically, the amorphous ZSM-5 could enable V to enrich electrons availing for oxygen activation to superoxide radical thanks to its low work function. The superoxide radical combines with Mo to form peroxide and then oxidize the sulfur-containing substrates. 100% desulfurization can be realized at 80°C for model oil with sulfur content of 500 ppm over the amorphous ZSM-5 supported Mo-V-O catalyst. This study provides inspiration for designing efficient catalysts for aerobic oxidation desulfurization.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qiyuexin Wang,Hanyu Li,Huan Li,Xueying Yang,Fangcheng Qiu,Dacheng Zhou,Zhengwen Yang,Xin Zhen,Jianbei Qiu
The implementation of liquid organic hydrogen carriers (LOHCs) is constrained by the high energy consumption and strong dependence on precious‑metal catalysts in conventional thermal processes. This work develops a fluorine-doped Mo-Ni-F/NF bifunctional electrode through a simple electrochemical deposition-sintering method for efficient electrochemical hydrogen storage using quinoxaline under ambient conditions. XRD and TEM characterization revealed a unique structure comprising a MoNi₄ shell with embedded Ni nanoparticles, while SEM and EDS mapping confirmed uniform fluoride distribution and enhanced surface morphology. XPS analysis indicated that fluoride modification improved surface characteristics without altering chemical states. The catalyst demonstrates exceptional performance in reversible quinoxaline hydrogenation (92.1 % conversion after 5 h, 95.6 % FE) and dehydrogenation (100 % conversion after 4 h, 97.2 % FE). DFT calculations showed that electron transfer between MoNi₄ and nickel nanoparticles enhanced catalytic activity, while fluorine modulation reduced the adsorption energy of quinoxaline on nickel (111) from −2.84 eV to −0.55 eV, and tetrahydroquinoxaline from −2.08 eV to −0.84 eV, mitigating catalyst poisoning. In situ Raman spectroscopy identified dynamically formed NiOOH as the active phase, which facilitates proton-coupled dehydrogenation via -OH/μ-O-Ni intermediates. This work provides novel catalytic materials and mechanistic insights for the development of low-cost, room-temperature, and highly effective electrochemical LOHC systems.
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DOI
高影响因子
Crystals
·
2026
·Vol. 16
·期 1
·51
·
IF 2.4
Xi Shi,Shiyuan Zhu,Qiongyu Zhou,Bo Liang,Jun Li,Guangji Li,Longquan Chen,Peijun Xu
Ni-Mo alloy coating has shown exciting potential as a candidate to replace chromium coating. In this paper, Ni-Mo alloy coatings were successfully electrodeposited from a citrate/ammonia bath, and the effect of the bath pH values over a wide range (4–10) on the characteristics and corrosion resistance of Ni-Mo alloy coating was studied in detail. Results show that all the deposited Ni-Mo alloy coatings consist of a crystalline solid-solution Ni(Mo) fcc structure. An increase in bath pH values could facilitate the deposition of Mo, thereby increasing the Mo content and decreasing the crystallite size of Ni-Mo alloy coatings. However, there are subtle gaps between the coarse grains on the surface of the Ni-Mo alloy coating deposited at pH 10. These subtle gaps tend to form between the coarse grains on the surface of the electrodeposited Ni-Mo alloy coating because of the relatively high Mo content, refined grains, and appropriate morphology. The Ni-Mo alloy coating deposited at pH 9 exhibits optimal corrosion resistance, attributed to its lowest corrosion current densityicorr(7.31 × 10−6A cm−2), the strongest polarization resistance (11.13 kΩ·cm−2), and impedance value, which are mainly contributed to by the coating resistance and charge-transfer resistance.
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产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2021
·
IF 5.234
Dongjing Jiang,Zhi Dong,Zunfeng Du,Qian Zhao,Hui Wang,Zongqing Ma
It is an effective way to enhance the mechanical properties of Mo alloy by adding oxide strengthening phase. However, the oxide second-phase particles in oxide dispersion strengthened Mo (ODS-Mo) alloy prepared via traditional mechanical alloying generally coarsen at grain boundaries (GBs), greatly weakening their strengthening effect . To solve this problem, single and multiple oxide particles strengthened Mo alloys are developed via wet chemical method and subsequent low-temperature sintering in this work. After doping CeO 2 , the compressive yield strength (340.3 ± 8.1 MPa) and hardness (410 ± 13 HV) of Mo–Y 2 O 3 (Mo–Y) alloy were decreased by 17.9% and 22.7%, respectively. However, after doping La 2 O 3 , the compressive yield strength and hardness of Mo–Y alloy are further increased by 89.4% and 21.0%, respectively. According to microstructure observation and theoretical calculation, CeO 2 doping decreases the volume fraction of intergranular oxide particles and weakens interfacial drag force, finally promoting Mo grain growth and worsening the mechanical properties of Mo–Y alloy. In contrast, after doping La 2 O 3 , more oxide particles are dispersed at GBs, and their coarsening are inhibited. This results in a stronger Zener force. Moreover, interfacial drag force can also be increased through doping La 2 O 3 . Two forces synergistically hinder GBs migration. Therefore, La 2 O 3 doping leads to Mo grain refinement and ultimately enhances the mechanical properties of Mo–Y alloy. These results in our work can provide theoretical guidance for choosing proper oxide dopants to prepare ODS alloys with excellent mechanical properties.
研究领域:
材料科学
·
金属学与热处理
·
结构材料
·
粉末冶金
·
固态相变
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DOI
高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 147
·期 10
·2515-2522
·
IF 2.799
Zhang Zhenwei,Jiang Xingmao,Hu Jianheng,Yue Chuanjun,Zhang Jintao
Mesoporous nitrogen-doped carbon was synthesized in a controlled manner by a modified deep eutectic solvent method using silica nanoparticles as templates. Various amounts of urea and glucose, which contain hydrogen acceptor and hydrogen bond donor groups were heated and stirred to form homogeneous liquid precursors like deep eutectic solvents, and nitrogen element was uniformly dispersed on an atom scale. Ni-Mo sulfides supported on mesoporous carbon with varying N dopping exhibit excellent hydrodesulfurization (HDS) catalytic performance such as high conversion and good recycling stability in the HDS of dibenzenethiophene. Further investigation showed that a suitable N content in the carbon support enhance the HDS properties and the HDS conversion could reach up to 96%. Graphical
研究领域:
材料化学
·
催化化学
·
纳米材料
·
能源化学
·
环境催化
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Ning Li,Wenwen Zhao,Linping Li,Yangqin Gao,Lei Ge
Photocatalysts with hollow structures have drawn great interest owing to their high specific surface area, which can enhance the photocatalytic performance. Herein, we designed the hollow cubic Cu2–xS@Ni–Mo–S nanocomposites by vulcanizing from the Cu2O template and loading the Ni–Mo–S lamellas. The Cu2–xS@Ni–Mo–S composites greatly improved the photocatalytic hydrogen performance. Among them, Cu2–xS–NiMo-5 achieved the optimal photocatalytic rate of 1326.07 μmol/g h, which is approximately 3.85 times higher than that of hollow Cu2–xS (344 μmol/g h) and had good stability for 16 h. The enhanced photocatalytic property was attributed to the metallic behavior of bimetallic Ni–Mo–S lamellas and the LSPR (localized surface plasmon resonance) effect of Cu2–xS. The bimetallic Ni–Mo–S can effectively capture the photogenerated electrons and quickly transfer-diffuse to produce H2. Meanwhile, the hollow Cu2–xS not only provided many more active sites to take part in the reaction but also introduced the LSPR effect to increase the solar utilization. This work provides valuable insights into the synergistic effect of using non-precious metal co-catalysts and the LSPR materials to assist in the photocatalytic hydrogen evolution.
研究领域:
材料化学
·
光催化
·
能源科学
·
纳米材料
·
半导体物理
·
可再生能源
·
表面科学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Xue Yu,Shuying Cheng,Qiong Yan,Junjie Fu,Hongjie Jia,Quanzhen Sun,Zhiyuan Yang,Sixin Wu
Cation substitution has an important impact on the power conversion efficiency (PCE) of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. Herein, a significant PCE enhancement of flexible indium-doped CZTSSe solar cells has been achieved by partially substituting Sn 4+ with In 3+ . Systematic measurements indicate that In doping in CZTSSe film effectively improves the crystallinity and carrier concentration of the absorber layer . Meanwhile, the treatment reduces interface recombination and band tailing by passivating deep defects and increases the open-circuit voltage ( V oc ) of the solar cells. By physical analysis, the key parameters for the solar cell diode such as A , J 0 , R s and R sh are significantly improved after In-doping, indicating better PN junction quality. Under the optimal In-doping (x = In/(Sn + In) = 9%), the flexible Cu 2 ZnSn 1- x In x (S,Se) 4 solar cell has been successfully obtained with the best efficiency of 7.19% and the V oc enhancement of 62 mV due to reduced V oc deficit and band tailing.
研究领域:
材料科学
·
半导体物理
·
光伏技术
·
无机功能材料
·
能源材料
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DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2020
·Vol. 51
·期 4
·1773-1783
·
IF 2.035
Wang Qi,Wang Lijun,Zhang Wei,Li Jianmin,Chou Kuochih
The influence of small amounts of cerium on the solidification phenomena of S31254 high-Mo austenitic stainless steel was investigated by in situ observations and theoretical calculations. In situ observations indicate that cerium addition in molten steel can accelerate austenitic nucleation but inhibit primary austenite grain growth. The initial nucleation temperature occur 32.3 °C in advance and the nucleation site density increases to 176/mm after 2 seconds in S31254-Ce compared to S31254. The modified Ce-containing inclusions in S31254-Ce improve the ability for austenite heterogeneous nucleation, which would significantly reduce the energy barrier of nucleation. The nucleation mechanism obtained from Johnson–Mehl–Avrami–Kologoromov (JMAK) theory is changed from site saturation nucleation to site saturation plus Avrami nucleation after cerium addition. Furthermore, cerium addition also prolongs the whole solidification temperature range from 28 °C to 43.9 °C and limits the growth velocity of a single austenite grain from approximately 20 to 2 μ m/s. The ratio of the solid phase decreases from 60 to 8.2 pct, but the grain density increases from 68.8 to 280/mm 2 , with the solidification time extended to 8 seconds after cerium addition. Thus, the main solidification behavior in the early solidification stage of S31254-Ce is nucleation instead of primary grain growth. The low growth velocity for austenite grains and significant high nucleation site density exhibit a low rate constant k during the solidification process. Moreover, cerium addition could significantly refine the solidified structure, and the grain density of the final solidified structure in S31254-Ce is 366.6/mm 2 .
研究领域:
材料科学
·
冶金学
·
物理冶金
·
凝固加工
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DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2021
·
IF 3.871
Weiqiang Hu,Zongqing Ma,Zhu Qian,Jin Wu,Ji Dong,Hui Wang,Yongchang Liu
The Mo based alloys with minor Ti additive were fabricated by successive processes of simple ball-milling and low-temperature sintering. Different from traditional titanium oxides additive, the minor Ti additive will adsorb nearby oxygen impurities to form TiO 2 or Ti 8 O 15 during above process, thus purifying Mo matrix. The size of formed titanium oxides (approximately 540 nm) is also close to that reported in relevant literatures. What's more, the Ti additive could availably refine the Mo powder particles during ball-milling process and improve its sintering activity. While maintaining high densit (> 99%), the sintered Mo based alloys with minor Ti additive possess finer grain (13.17 μm → 4.44 μm) and higher hardness (249 HV 0.2 → 332 HV 0.2 ) compared with pure Mo.
研究领域:
材料科学
·
冶金学
·
机械工程
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DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 11
·2012-2019
·
IF 3.85
Hu Weiqiang,Gong Fengming,Liu Shaocun,Tan Jing,Chen Songhua,Wang Hui,Ma Zongqing
The oxide dispersion strengthened Mo alloys (ODS-Mo) prepared by traditional ball milling and subsequent sintering technique generally possess comparatively coarse Mo grains and large oxide particles at Mo grain boundaries (GBs), which obviously suppress the corresponding strengthening effect of oxide addition. In this work, the Y 2 O 3 and TiC particles were simultaneously doped into Mo alloys using ball-milling and subsequent low temperature sintering. Accompanied by TiC addition, the Mo−Y 2 O 3 grains are sharply refined from 3.12 to 1.36 µm. In particular, Y 2 O 3 and TiC can form smaller Y−Ti−O−C quaternary phase particles (∼230 nm) at Mo GBs compared to single Y 2 O 3 particles (∼120 nm), so as to these new formed Y−Ti−O−C particles can more effectively pin and hinder GBs movement. In addition to Y−Ti−O−C particles at GBs, Y 2 O 3 , TiO x , and TiC x nanoparticles (<100 nm) also exist within Mo grains, which is significantly different from traditional ODS-Mo. The appearance of TiO x phase indicates that some active Ti within TiC can adsorb oxygen impurities of Mo matrix to form a new strengthening phase, thus strengthening and purifying Mo matrix. Furthermore, the pure Mo, Mo−Y 2 O 3 , and Mo−Y 2 O 3 −TiC alloys have similar relative densities (97.4%–98.0%). More importantly, the Mo−Y 2 O 3 −TiC alloys exhibit higher hardness (HV 0.2 (425 ± 25)) compared to Mo−Y 2 O 3 alloys (HV 0.2 (370 ± 25)). This work could provide a relevant strategy for the preparation of ultrafine Mo alloys by facile ball-milling.
研究领域:
材料科学
·
金属合金制备
·
微观结构调控
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DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 35
·期 6
·065704
·
IF 3.5
Xiaomei Yu,Wei Shi,Jiajiao Wei,Tiantian Liu,Yuanyuan Li,Mengyuan He,Zhengyu Wei,Dehai Ping,Panfei Sun,Jin You Zheng,Songjie Li
Developing non-noble-metal electrocatalysts for hydrogen evolution reactions with high activity and stability is the key issue in green hydrogen generation based on electrolytic water splitting. It has been recognized that the stacking of large CoP particles limits the intrinsic activity of as-synthesized CoP catalyst for hydrogen evolution reaction. In the present study, N-MoxC/CoP-0.5 with excellent electrocatalytic activity for hydrogen evolution reaction was prepared using N-MoxC as decoration. A reasonable overpotential of 106 mV (at 10 mA cm−2) and a Tafel slope of 59 mV dec−1 in 1.0 M KOH solution was achieved with N-MoxC/CoP-0.5 electrocatalyst, which exhibits superior activity even after working for 37 h. Uniformly distributed ultrafine nanoclusters of the N-MoxC/CoP-0.5 hybrids could provide sufficient interfaces for enhanced charge transfer. The effective capacity of the hydrogen evolution reaction could be preserved in the complex, and the enlarged electrocatalytic surface area could be expected to offer more active sites for the reaction.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Biyun Fang,Zeliang Qi,Fangming Liu,Chuanfeng Zhang,Chunyan Li,Jun Ni,Jianxin Lin,Bingyu Lin,Lilong Jiang
The development of efficient oxides-supported bimetallic catalysts is critical for ammonia synthesis or other catalytic reactions. Herein, the design of ceria-supported Co-Mo bimetallic catalysts with different properties is performed by changing Mo addition to enhance the ammonia synthesis activities. It is found that the reduction of ceria and molybdenum oxide would be boosted by Co species, but the reduction of the bimetallic catalyst would be inhibited by the aggregated molybdenum oxide for the catalyst with Co and Mo simultaneous addition. On the contrary, this ill effect of molybdenum oxide on the reduction of the bimetallic catalyst can be effectively alleviated by the subsequent addition of Mo species to ceria-supported Co catalyst, resulting in enhancement of the proportion of Co metal, Ce 3+ and low-valent Mo species, as well as surface enrichment of Co species. In such cases, the amount of the adsorbed hydrogen and nitrogen species would increase, and hydrogen species preferentially desorbs following a pathway of H 2 formation. As a result, the catalyst obtained by the separate addition of Co and Mo shows 2.5-fold more active than its counterpart with the simultaneous addition of Co and Mo species. These findings provide a valuable insight in designing reducible oxide-supported bimetallic catalysts in ammonia synthesis or other hydrogen-involved reactions.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）