Journal of Central South University
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2021
·Vol. 28
·期 5
·1279-1290
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IF 1.716
Zhang Guang-ji,Tang Fei-ying,Wang Li-qiang,Yang Wen-jie,Liu You-nian
Transition metal sulfides (TMSs)-based materials have been extensively investigated as effective non-noble catalysts for various applications. However, the exploration of TMSs-based catalysts for hydrogenation of nitro compounds is limited. Herein, CoS x /NC catalysts were prepared by solvothermal sulfurization of ZIF-67, followed by high-temperature annealing (300–600 °C) under NH 3 atmosphere. It was found that the structures and compositions of the as-prepared CoS x /NC can be readily tuned by varying the annealing temperature. Particularly, CoS x /NC-500, which possesses higher degree of S defects and larger specific surface areas, can achieve high conversion, selectivity and stability for catalytic reduction of nitro compounds into amines under mild reaction conditions.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Zhentao Song,Limin Wang
In this work, the heterostructure of CoS x /Ag/Ag 2 S/ZnIn 2 S 4 (CAAZ) was synthesized by photodeposition reaction, cation exchange and low temperature solvothermal reaction. The degradation kinetic constants of TC and MO by CAAZ-3 within 60 min were 2.5 and 7.1 times that of pure ZnIn 2 S 4 , respectively, and CAAZ-3 still maintained good catalytic activity after 5 cycles. ZnIn 2 S 4 nanosheet is attached to the surface of CoS x hollow structure, which increases the reactive active site and improves the efficiency of light utilization. Notably, the introduction of Ag/Ag 2 S nanoparticles accelerates the conduction rate of photogenerated charge between the interfaces, which is consistent with the results of photochemical tests. It was found that the synergistic interaction of •O 2 - and h + played an important role in the degradation process of TC molecules. This study focuses on the development of photocatalysts for the efficient degradation of organic pollutants and theoretically demonstrates the importance of optimizing conductive interfaces for improving photocatalytic activity.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Muhammad Afsar Khan,Fei Lu,Liangliang Min,Min Zhou
In seawater electrolysis, the presence of Cl − ions corrodes the electrode and causes side reactions, severely degrading OER efficiency and stability. To address these challenges, we developed a crystalline-amorphous heterointerface to enhance their OER activity and stability. The synergistic coupling of crystalline and amorphous phases creates optimal sites for superior catalytic activity. In addition to the robust performance, partial leaching of the amorphous CoS x phase forms a protective sulfate layer and triggers surface reconstruction. This rich passivated layer of OH − creates an alkaline environment near the electrode surface that repels Cl − electrostatically. Therefore, the optimum NiMn 2 O 4 /CoS x catalyst indicates an ultralow overpotential of 220 and 255 mV at 100 mA cm −2 and robust performance of 700 h and 300 h at 500 mA cm −2 in alkaline and seawater conditions. This work provides a blueprint for developing highly effective and stable catalysts for clean energy production.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Haoyuan Chen,Hao Xu,Bofei Li,Zhao Li,Kemin Zhang,Jianxin Zou,Zhigang Hu,Richard M. Laine
Magnesium-lithium dual-ion batteries (MLDBs) use Mg 2+ /Li + dual-ion electrolytes and safe magnesium anodes to achieve high performance. Coincidentally, conversion-type chalcogenides are widely used as cathodes for MLDBs due to their high theoretical specific capacities. In this work, we prepared amorphous hollow cobalt sulfide nanocages with different etching time (AH-CoS x -T, T = 30, 60 and 120 min) as cathode materials for high performance MLDBs. The results indicate that AH-CoS x -60 cathodes show a high initial capacity of 618 mAh g −1 at 0.1 A g −1 and maintain 130 mAh g −1 at 0.5 A g −1 after 500 cycles, indicative of that the recorded high-performance benefits from amorphous and mesoporous structure. Moreover, ex-situ SEM and XPS analyses confirm that Mg 2+ /Li + co-reactions occur in AH-CoS x -60 cathodes during discharge/charge. For comparison, we also sintered AH-CoS x -60 to generate crystalline Co 9 S 8 and Co 1– x S, respectively. Results show that both Co 9 S 8 and Co 1- x S cathodes for MLDBs exhibit poorer cycle stability and much longer activation process, providing further evidence of the advantageous amorphous structure of AH-CoS x -60. Our work thus provides an insight into preparing amorphous conversion-type cathodes with high capacities and short activation process for high performance MLDBs.
研究领域:
材料科学
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电化学
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储能
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纳米材料
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电池技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Karla Hernandez Ruiz,Matteo Ciprian,Rong Tu,Francis Verpoort,Meijuan Li,Song Zhang,Jorge Roberto Vargas Garcia,Haiwen Li,Takashi Goto,Yuchi Fan,Wan Jiang,Lianmeng Zhang
Designing low-cost and highly efficient electrocatalysts has become a critical aspect to achieve sustainable energy production. Herein, we report the preparation strategy of MoS 2 on Co-oxide nanoparticles embedded nitrogen-doped carbon nanosheets (Co-NC) those derived by ZIF-L anchored on a carbon cloth as an electrode for hydrogen evolution reaction (HER). The hybrid electrode denoted as MoS 2 /Co-NC/CC was synthesized in sequence of the growth of the leaf-like zeolitic imidazolate framework (Co-ZIF-L) on a carbon cloth (CC), the carbonization of the Co-ZIF-L and deposition of MoS 2 by metal organic chemical deposition (MOCVD). The hierarchical porous catalyst presented remarkable electrochemical activity towards the HER in acidic solution, exhibiting great stability and fast kinetics with a small Tafel slope of 51 mV dec −1 . Moreover, to produce a current density of 10 mA cm −2 (η 10 ), MoS 2 /Co-NC/CC required a low overpotential of 111 mV, which is comparable with Pt.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 1
·121054
·
IF 7.2
Qi-Rui Zhang,Yu-Long Wang,Zhi-Hao Deng,You-Long Chen,Si-Jing Ding,Liang Ma
Semiconductor junction shows greatly potential in photocatalysis due to the unique merits for charge separation, however the photocatalytic efficiency is still limited by the monotonous charge separation pathway and weak light absorption. Herein, multichannel charge separation driven by multiple internal electric fields (IEFs) has been proposed in ReS 2 /CoS x /CdS hollow nanostructures, which greatly improves the photocatalytic activity. By growing CdS nanoparticles on hollow ReS 2 /CoS x hybrids, the ReS 2 /CoS x /CdS ternary hybrids with Schottky junction (ReS 2 -CoS x ), type-I junction (ReS 2 -CdS), and Ohmic contact (CoS x -CdS) were constructed. The unique hollow structure and bandgap excitation endow the ReS 2 /CoS x /CdS hybrids with high light-harvesting efficiency across a broad spectrum from ultraviolet (UV) to near-infrared (NIR). Ultrafast transient absorption (TA) characterization elucidates the multi-interface charge transfer mechanisms, which involve electron transfer from CoS x to ReS 2 , from CdS to ReS 2 , from CdS to CoS x , and a possible sequential transfer from CdS to CoS x and then to ReS 2 . These pathways significantly prolong the lifetime of charge carriers and suppress charge recombination. Concurrently, the multiple IEFs facilitate charge separation and prevent back-transfer, further inhibiting charge recombination. The ReS 2 /CoS x /CdS hollow nanostructures exhibit remarkably enhanced photocatalytic activity, which is 15.00 and 15.36 times of pure CdS and ReS 2 , respectively, under visible light irradation (λ > 420 nm) with Na 2 S/Na 2 S 2 O 3 as the hole sacrificial agent. This study provides valuable insights for designing efficient photocatalysts based on semiconductor junction, and the synthesized materials show promising potential for solar-driven energy conversion applications.
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高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Chencheng Gao,Hongfeng Hua,Ming Du,Jinsong Liu,Xiaoyu Wu,Yong Pu,Xing'ao Li
Electronic regulation through component precise control at the atomic level of electrocatalysts has a fundamental influence on the efficiency of hydrogen evolution reaction (HER). Herein, we successfully demonstrate a ZIF-based charge transfer medium for improving the electrocatalytic activity of MoS 2 towards HER. Benefit for the enough porous structure, superior electron conductivity as well as the synergistic effect from the doped atoms, the hybrids phase (1T/2H) MoS 2 nanoflowers decorated amorphous Mo-CoS x skeleton exhibited the promotional electrocatalytic performance in efficiency and stability. Specifically, an extremely low overpotential of 73 mV at the current density of −10 mA cm −2 and an impressive Tafel slope of 39.2 mV dec −1 had been achieved from the nanocomposites in an acidic condition (0.5 M H 2 SO 4 ). The satisfactory activity improvement can be ascribed to the enhancement of electronic transmission rate as well as the synergistic effects between the doped Mo element and CoS x . This work might develop a new avenue to design highly efficient multicomponent electrocatalysts towards HER.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xiaoqian Peng,Yingyi Li,Kairuo Zhu,Qingda An,Jingai Hao,Zuoyi Xiao,Xiaoling Dong,Shangru Zhai
Exploiting low-cost and high-performance biochar catalysts is vital for the detoxification of organic wastewater and the resource utilization of algal biomass. Herein, CoS x containing biochar (CoSBC) was prepared using exogenous Co salt and endogenous Porphyra rich in S elements for enhanced degradation of carbamazepine (CBZ) by peroxymonosulfate (PMS) activation. 95.73% of CBZ (20 mg/L) can be removed within 20 min in CoSBC-900/PMS system with a degradation rate of 0.1287 min −1 , and maintained a higher catalytic efficiency after five cycles (> 90%). Besides, the CoSBC-900/PMS system held excellent resistance over various coexisting substances, and could efficiently degrade multiple organic contaminants . Mechanism analyses revealed that 1 O 2 and SO 4 •− collaborated for CBZ degradation, in which 1 O 2 played the dominant role and 1 O 2 mainly originated from the formation process: PMS→O 2 •− → 1 O 2 . The low redox potential of S species accelerated Co(II)/Co(III) circulation, while Porphyra biochar also served as the highly active centers, producing abundant active species (SO 4 •− ). The possible intermediate products accompanying CBZ degradation were proposed based on LC-MS analysis and the corresponding toxicity assessment verified that the CoSBC-900/PMS system possesses desirable CBZ detoxification ability. This study provides novel insight into the development of transition metal-based biochar catalysts from algal biomass for the purification of organic wastewater.
研究领域:
环境科学
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催化材料
·
水污染治理
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
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IF 4.1
Xiuzhu Zhang,Qiuxiang Wang,Zongxue Yu,Juan Wang,Qiuyue Tan,Niandan He
With the development of industry, water resources have been seriously polluted, posing a great threat to human health and ecological development, and it is urgent to realize the efficient treatment of sewage-containing wastewater. The CoSx modified by thioacetamide grew in the interlayer of graphene oxide , which provided the composite membrane with self-cleaning ability, and at the same time enlarged the interlayer channels, which resulted in the flux and hydrophilicity significantly better than that of GO, and the retention rate of different types of oil-in-water emulsions was above 99 %. Encouragingly, the GO@CoSx-activated PMS system exhibited extremely high degradation performance for methylene blue. After 5 cycles, the flux of the composite membrane to the oil red-petroleum ether-oil-in-water emulsion under the light condition was higher than that under the dark condition, and the retention rate was kept at 99.93 %, with excellent antifouling performance. The composite membrane showed good degradation of methylene blue under alkaline conditions (99.84 %) and excellent removal of oil red-petroleum ether-oil-in-water emulsion under strong acid/alkaline conditions (99.37 %). The composite membrane has good chemical stability and mechanical properties for long-term use. This study will provide a new idea for the separation of oil-water emulsions, which has a broad application prospect.
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高影响因子
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