Fundamental Research
·
2021
·
IF 0
Huilin Wang,Xiaoxiao Han,Lingling Zhang,Ke Wang,Rui Zhang,Xiao Wang,Shuyan Song,Hongjie Zhang
The development of bifunctional electrocatalysts for overall water splitting is highly desired for converting electricity into chemical energy. However, the synthesis of high-performance bifunctional electrocatalysts remains a pressing challenge. Here, we found that both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance of the Co 3 S 4 electrode can be significantly improved by integration with CeO 2 . Specifically, as-prepared 5% Ce-Co 3 S 4 and 1% Ce-Co 3 S 4 delivered low overpotentials of 290 and 257 mV to achieve 10 mA cm −2 for the OER and HER in 1.0 M KOH, respectively. The crucial role of CeO 2 originated from its unique surface with abundant oxygen vacancies, which were beneficial for the stabilization of Co 2+ sites with high OER activity and both the adsorption and dissociation of water molecules in the HER process. This work is expected to provide a general approach to prepare a wide range of high-performance electrode materials for energy-related applications.
研究领域:
电化学
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材料科学
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能量转换
✓ 已验证
产品关联
DOI
RSC Advances
·
2014
·Vol. 4
·期 81
·42917-42923
·
IF 3.708
Zhelu Hu,Kai Xia,Jing Zhang,Ziyang Hu,Yuejin Zhu
Laminar cobalt sulfide (Co3S4) nanosheets are successfully deposited on fluorine doped tin oxide (FTO) substrates by a facile one-step hydrothermal method. When it was applied to dye sensitized solar cells as the counter electrode (CE), the laminar Co3S4 electrode, consisting of interconnected nanosheets, exhibits prominent catalytic activity and outstanding metallic conductivity. It is the special structure that facilitates the electron transfer and reduces interface resistance. Under one sun (100 mW cm−2) illumination, the dye-sensitized solar cell with the Co3S4 CE shows comparable photovoltaic conversion efficiency (Eff = 7.19%) to that with a Pt CE (Eff = 7.27%). The results indicate that the in situ hydrothermal method and the prepared novel laminar Co3S4 CE has potential for developing low-cost and high-efficient counter electrodes.
研究领域:
材料科学
·
可再生能源
·
纳米技术
·
光伏
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Luping Feng,Jianghong Wang,Xiao Zhuang,Yujie Fan,Leyao Jin,Enjun Chen,Xinfeng Li,Peisong Tang,Lixiang Zhang
A bifunctional tubular step-scheme Co 3 S 4 /CdS heterostructure was successfully synthesized for efficient photoelectrochemical (PEC) detection coupled with the degradation of tetracycline (TC). It was found that so-obtained heterostructure could effectively suppress the recombination of photo-generated carriers and display larger PEC responses owing to the internal electrostatic field. Upon adding TC, the photocurrent signal of Co 3 S 4 /CdS heterostructure was specifically activated due to the direct consumption of holes in CdS component by TC, resulting in significantly enhanced charge separation. Crucially, the photo-induced holes in CdS and produced • OH radicals can realize catalytic degradation of TC during its detection and the possible intermediates and degradation pathways were speculated. A dual-functional PEC sensing platform has thereby been developed for detection and degradation of TC with ultra-low detection limit and high degradation efficiency. Additionally, the developed sensor displayed excellent selectivity and high stability, demonstrating its potential for TC detection and degradation in tap-water and milk samples.
研究领域:
环境科学
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 45
·16305-16312
·
IF 4.099
Xiaoqiang Du,Hui Su,Xiaoshuang Zhang
With the increasing energy demand and environmental pollution, hydrogen production by water splitting is one of the best ways to solve the energy shortage. Three-dimensional (3D) hierarchical Co3O4@Co3S4/NF was first synthesized directly in situ, grown on the nickel foam through a simple hydrothermal process, and the anion-exchange reaction and the Ostwald ripening mechanism were investigated by adjusting the reaction time. The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activities of Co3O4@Co3S4/NF-24 h were investigated, and the required overpotentials were 270 mV and 143 mV, when the current density was 100 mA cm−2 and 20 mA cm−2, respectively. Subsequently, the overall water splitting activity of Co3O4@Co3S4/NF-24 h was investigated; when the current density was 10 mA cm−2, the low cell voltage was 1.53 V, which, to our knowledge, was among the smallest values reported for electro-driven water splitting so far. This high catalytic activity is attributed to the construction of the O–S interface and the increased electron transfer rate at the beginning of the reaction. Through XRD, SEM and XPS characterization, it is proven that Co3O4@Co3S4/NF-24 h is relatively stable and is expected to be an efficient and stable water splitting catalyst.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 41
·14973-14981
·
IF 4
Xiangyu Zhang,Hong Li,Yanhui Li,Xianhui Wang,Hongbin Wang,Wenrong Yang,Jingquan Liu,Da Li
To replace the current expensive precious metal catalysts for water electrolysis, it is important to develop inexpensive and powerful bifunctional catalysts for hydrogen production. It is an effective way to improve catalytic performance using excellent templates and elemental doping. Here, a hierarchical structure Fe-Co3S4/MoS2 was synthesized using an Fe–ZIF precursor prepared by ion exchange, followed by hydrothermal sulfuration and annealing. It required overpotentials of only 93 mV and 243 mV to achieve a current density of 10 mA cm−2 in the HER and OER, respectively. It also showed excellent catalytic performance for overall water splitting, requiring only 1.42 and 1.71 V to achieve current densities of 10 and 100 mA cm−2 in 1 M KOH. The catalyst also demonstrated excellent ultra-long-term stability. The superb catalytic performance and stability can be attributed to the Fe doping, exposing more active sites while retaining the highly stable framework of the ZIF. The component modulation of Co3S4 and MoS2 by Fe doping induced high intrinsic activity and excellent transfer coefficients. This work presents a novel approach to prepare noble metal-free catalysts with highly stable rich interfaces and defects for overall water splitting.
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 ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Defeng Qi,Ying Wang,Xinru Xu,Xiao Jiang,Mushtaq Ahmad,Zhao Chao,Zhenyi Yu,Meiling Lian,Yong Wang,Zhen Zhang
Nanostructured transition metal sulfides (TMSs) have attracted great attention owing to their superior electric conductivity and easy redox reaction properties in oxygen evolution reaction (OER) catalysts. However, the strong metal-metalloid bonds (M−S) and metalloid-metalloid (S S) bonds in the crystal structure of TMSs are difficult to break, which might result in the insufficient formation of electrocatalytically active metal hydroxide species on the surface and prevent the realization of their full OER potential. Herein, we demonstrate an approach by sculpting Co(OH) 2 on Co 3 S 4 nanotubes (Co 3 S 4 /Co(OH) 2 ) as highly reactive and stable electrocatalysts for efficient OER. The electron transfer between cobalt and sulfur and the pre-sculpted Co(OH) 2 promote the formation of rich hydroxide active species on the surface of Co 3 S 4 /Co(OH) 2 . The optimized Co 3 S 4 /Co(OH) 2 –0.8 catalyst possesses excellent electrocatalytic activity for OER in an alkaline medium, with a relatively low OER overpotential of 269 mV (at 10 mA cm −2 ) and a Tafel slope of 95.2 mV dec -1 . This work provides a new sight of designing TMS electrocatalysts for practical application in efficient water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Bin Zhang,Changchun Sun,Chao Wang,Zhan Jiang,Guangting Han,Haiguang Zhao
Hydrogen is increasingly needed as a clean energy source with high energy density. Hydrogen evolution reaction (HER) via electrocatalysis is a viable way to produce clean hydrogen. The key to achieving active HER is to select highly-active electrocatalysts. Although Pt-based noble metal catalysts have excellent performance, they are expensive and earth-abundant. Compared to noble metals, cobalt chalcogenide has been used for efficient HER. Here, we first demonstrated a porous material based on C-dots/cobalt chalcogenide nanofibers as an effective electrocatalyst for HER. Co 3 O 4 /10 wt% C-dots nanofibers-based electrode reached an overpotential of 383 mV at the current density of 10 mA·cm −2 with Tafel slope of 93.4 mV·dec −1 in 1 M KOH, which is much better than bare Co 3 O 4 (758 mV at 10 mA·cm −2 , Tafel slope is 111.3 mV·dec −1 ). In addition to the excellent HER performance, the Co 3 O 4 /C-dots nanofibers performed very well in terms of stability after a 10-hour operation, and the overpotential was even reduced by 6.7%. With the further sulphuration, the Co 3 S 4 /C-dots nanofibers exhibited an overpotential of 280.2 mV at the current density of 10 mA·cm −2 . This work indicates that the C-dots can be used as an efficient additive for cobalt chalcogenide based electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zehua Wang,Ziyang Peng,Dan Li,Xinyi Liu,Qiong Mei,Jianfei Sun,Hongjie Wang
Thiamethoxam (THX), a neonicotinoid pesticide, exhibits potential ecotoxicity in aquatic environments. In this study, a combined experimental and density functional theory (DFT) approach was applied to investigate partial Fe-substituted Co 3 S 4 (Fe x Co, x = 0.01, 0.03, 0.05, 0.07, 0.09, and FeCo 2 S 4 ) for the effective activation of PMS and the degradation of THX. Fe doping elongated Co S bonds on the catalyst to promote the formation of sulfur vacancies, which enhance the adsorption and charge transfer capability of PMS. Due to the fastest degradation rate (0.511 min −1 ), the optimal PMS adsorption stability (1.11 eV), more electron transfer (0.72 e − ), and longer O O bond (1.468 Å), Fe 0.03 Co catalyst can preferably activate PMS to generate SO 4 •- and 1 O 2 , which was the most significant ROS for degrading THX. The initiation reaction of SO 4 •- -addition was superior to 1 O 2 , and the optimal active site was the C2 sites. Proposed degradation pathways and ecotoxicity evaluation highlighted the critical role of denitrification and hydroxylation in toxicity attenuation. In addition, Fe 0.03 Co/PMS catalyst had certain catalytic stability and reusability, and its degradation efficiency in farmland irrigation water can reach 80 %. This work not only elucidated the performance enhancement mechanism of Fe-substituted Co 3 S 4 catalyst, but also provided support for the application of sulfide-metals on advanced oxidation treatment of pesticide wastewater.
研究领域:
环境化学
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催化科学
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水污染控制
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理论计算化学
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农药环境行为
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高级氧化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 16.8
Jing Tian,Mei-Jing Cao,Jin Dang,Wen-Long Liu,Yang Zhou,Zhen-Yu Zhang,Ying Li,Jia-Run Li
The low electrical conductivity and inferior catalytic activity of cobalt sulfide are the primary factors limiting their application in electrocatalytic water splitting. In this work, CoS/Co 3 S 4 and Fe-CoS/Co 3 S 4 were initially synthesized via a hydrothermal method and subsequently annealed in an NH 3 atmosphere to obtain Fe, N-CoS/Co 3 S 4 . On the one hand, introducing the Fe element resulted in the modulation of the electronic structure and increased the electrochemically active surface area, promoting charge transfer efficiency and providing more active sites for the oxygen evolution reaction and overall water splitting reactions. On the other hand, doping N element introduced sulfur vacancies, enhancing the electrical conductivity and charge transfer efficiency. Consequently, Fe, N-CoS/Co 3 S 4 exhibits significantly higher oxygen evolution reaction (OER) and overall water splitting activity at a current density of 10 mA cm −2 compared to CoS/Co 3 S 4 , with overpotentials of 294 mV and 332 mV, respectively. Furthermore, this catalyst demonstrates excellent stability. The design of the catalyst structure provides theoretical support for researching Co-based catalysts in oxygen evolution reactions and overall water splitting.
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2021
·
IF 7.328
Ying Jiang,Yi Lu,Lingli Lei,Shengyu Zhou,Lu Yang,Xiaoyan Yang,Zhigang Xu,Jing Liu,Yingshuai Liu
Reactive oxygen species (ROS) with strong oxidability have been considered as effective agents for antitumor therapy through oxidative damage to lipids, proteins, DNA and RNA. In this work, a multifunctional hollow cobaltosic sulfide (Co 3 S 4 )/photosensitizer indocyanine green (ICG) nanocomplex (Co 3 S 4 -ICG) has been synthesized by efficiently loading ICG into the hollow Co 3 S 4 to realize synergistic antitumor therapy via chemodynamic therapy (CDT), photodynamic therapy (PDT) and photothermal therapy (PTT) under near-infrared (808 nm) laser irradiation. Co 3 S 4 nanoparticles would be degraded in tumor acidic microenvironment into Co 2+ , which locally triggers a Fenton-like reaction to produce cytotoxic hydroxyl radicals ( OH) for CDT. Co 3 S 4 -ICG could also produce singlet oxygen ( 1 O 2 ) through a multi-step photochemical process for PDT under 808 nm laser irradiation. The slow release of ICG in the tumor region was achieved due to hollow-structured Co 3 S 4 working as nanocarriers, and which has been proved an effective approach for combined CDT/PDT. In addition, Co 3 S 4 -ICG showed high photothermal conversion efficiency (40.5%) for PTT, and excellent OH generation capability via photothermal-improved Fenton reaction, leading to the synergistically improved antitumor efficacy. In vitro and in vivo experimental results confirm that the combined PTT/PDT/photothermal-enhanced CDT therapy can effectively ablate tumors with a negligible systemic toxicity. This work provides a valuable strategy for designing and constructing of a multifunctional nanoplatform for synergistic antitumor therapy of solid tumors.
研究领域:
生物医学工程
·
肿瘤学
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Li Tongtong,Wang Boran,Cao Yu,Liu Zhexuan,Wang Shaogang,Zhang Qi,Sun Jie,Zhou Guangmin
Hydrogen production by seawater electrolysis is significantly hindered by high energy costs and undesirable detrimental chlorine chemistry in seawater. In this work, energy-saving hydrogen production is reported by chlorine-free seawater splitting coupling tip-enhanced electric field promoted electrocatalytic sulfion oxidation reaction. We present a bifunctional needle-like Co 3 S 4 catalyst grown on nickel foam with a unique tip structure that enhances the kinetic rate by improving the current density in the tip region. The assembled hybrid seawater electrolyzer combines thermodynamically favorable sulfion oxidation and cathodic seawater reduction can enable sustainable hydrogen production at a current density of 100 mA cm −2 for up to 504 h. The hybrid seawater electrolyzer has the potential for scale-up industrial implementation of hydrogen production by seawater electrolysis, which is promising to achieve high economic efficiency and environmental remediation.
研究领域:
化学工程
·
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xuanning Qin,Han pang,Zebin Yu,Zuoyu Qin,Ronghua Jiang,Shuangquan Yao,Jun Huang,Yanping Hou,Ben Fan
Accelerating electron transfer and exposing active sites are key factors that could improve electrocatalytic hydrogen evolution reaction (HER). In this study, Co 3 S 4 -Ni 3 S 2 -C/N, the cactus bulb-shaped nanoparticles based on metal-organic frameworks (MOFs), were successfully prepared. The catalyst requires only 101 and 227 mV overpotential to reach current densities of 20 and 100 mA cm −2 , respectively, in 1 M KOH. The high catalytic activity is attributed to the confinement effect achieved by introducing 2-aminoterephthalic acid as a precursor, allowing the catalyst to have a small particle size and fully exposed metal active sites. Moreover, the catalyst has a highly conductive metal-S-C/N channel that effectively reduces the intrinsic charge transfer resistance of the catalytic electrode, improves its conductivity, and modulates the electron density at the metal active site. Furthermore, compared to other crystal planes, the exposed (111) crystal plane of Co 3 S 4 provides the most octahedral coordination of high spin state Co 3+ , which is highly catalytically active. This makes it the dominant crystal plane for catalysis. Through spatial confinement effect to limit metal sulfide particle size and introducing an organic backbone to create highly conductive metal-S-C/N channels, our study provides a general approach to developing highly active catalytic materials.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
✓ 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）