GREEN CHEMISTRY
·
2025
·
IF 9.2
Sheraz Muhammad,Bowen Yao,Aling Zhou,Zhiyang Huang,Sumayya Khan,Fengli Wei,Zuyang Luo,Tayirjan Taylor Isimjan,Xiulin Yang
Unlocking the full potential of metal-organic frameworks (MOFs) for water-splitting applications requires innovative strategies to enhance their catalytic efficiency and stability. Here, we introduce a Mo-doped Fe-based MOF (MoFe-NH2-BDC) with a unique 2D nanosheet and plate-like morphology to revolutionize the oxygen evolution reaction (OER). Mo incorporation optimizes electronic properties, accelerates charge transfer, and dynamically reconstructs the catalyst surface into highly active FeOOH species, ensuring long-term performance. This next-generation electrocatalyst achieves an ultra-low overpotential of 254 mV at 20 mA cm‒2, with a rapid Tafel slope of 66 mV dec‒1, surpassing conventional RuO2 catalysts. Operando Raman and ATR-FTIR spectroscopy reveal that Mo facilitates an adsorbate evolution mechanism (AEM), stabilizing intermediates and boosting reaction kinetics. In a practical two-electrode system, MoFe-NH2-BDC (+) || Pt/C (−) demonstrates an exceptional cell voltage of 1.58 V at 100 mA cm‒2, maintaining stability for 85 h. These results underscore the transformative impact of Mo doping in MOFs, paving the way for highly efficient, durable, and scalable electrocatalysts for sustainable energy applications.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 10
·106518
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IF 4.386
Qingxiao Zhang,Pei Han,Hui Zhang,Jixin Yao,Xinyu Wang,Dongmeng Chen,Xueqin Zuo,Qun Yang,Shaowei Jin,Guang Li
The oxygen evolution reaction (OER) is a critical process in the operation of electrochemical water splitting. Metal-organic frameworks (MOFs) are applied in the field of OER electrocatalysis because of their unique structure, but the high impedance and unstable framework during pyrolysis remain unresolved. Here, MIL-88A (iron-based MOF) was modified by hydrolysis and loading Co(OH)2 to improve the catalytic activity. The electrochemical results showed that the Co(OH)2/MIL-88A achieved the optimized performance with the current density of 10 mA cm−2 at 278 mV (vs RHE). Density functional calculations (DFT) combined with characterization tests suggest that electrons transfer from Co(OH)2 to MIL-88A at the interface of the heterostructure, leading to a larger hole electron pair density. D-band theory calculations demonstrated that the synergistic effect of MIL-88A and Co(OH)2 in heterostructure strengthens the adsorption between active sites and adsorbate. The above proofs are the source of the excellent OER performance of the Co(OH)2/MIL-88A. The finding has certain reference significance for the heterogeneous treatment of iron-based MOF catalysts.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Yuqi Li,Yue Zhang,Zhiyuan Wang,Chengxu Zhang,Fanming Meng,Jianqiang Zhao,Xinpei Li,Jue Hu
Metal-Organic Frameworks (MOFs) materials with unique properties have attracted much attention in various fields. However, the limited number of active sites and the time-consuming synthesis process hinder their widespread application. Herein, this work demonstrates the first preparation of highly efficient and stable MOF (Fe-MOF-U) catalysts with enhanced specific surface area , morphology and active sites, through ultrasonic-assisted solvothermal method for oxygen evolution reaction (OER) electrocatalysis . The results show that the crystal size of Fe-MOF-U decreases significantly, and the specific surface area and pore size increase. In addition, many oxygen vacancies are produced in the crystal, making the reaction intermediates easier to form and thus improving the catalyst's oxygen evolution performance. The overpotential of Fe-MOF-U catalyst at 10 mA cm −2 is 221 mV, which is lower than that of the conventional solvothermal synthesized Fe-MOF-S (237 mV). Furthermore, the turnover frequency of the Fe-MOF-U catalyst is 3.32 s −1 at the overpotential of 300 mV, which is 5 times higher than that of Fe-MOF-S (0.70 s −1 ). In situ Raman and methanol molecular probe tests indicate a weakened adsorption of *OH on the Fe-MOF-U surface. DFT calculations are consistent with the characterization results, both proving that the ultrasonic-assisted solvothermal method can generate specific oxygen vacancy (μ 3 -O defect) in Fe-MOF-U which improved OER performance. This study provides a new idea for the morphology controlling and defect introduction of MOF and a new approach for its application.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Nannan Ma,Chuanqi Fei,Jing Wang,Yinling Wang
Metal-organic frameworks (MOFs) have been widely investigated as electrocatalysts for the oxygen evolution reaction (OER). However, their catalytic performance needs to be further improved. Herein, a multi-pronged approach combining multi-metallic MOFs, 2D ultrathin structures and MOF hybridization was attempted. Specifically, the nanocomposite of lamellar NiFe-BTC and nanowire-like cobalt carbonate hydroxide hydrate (CCHH) was prepared on nickel foam (NF) by a two-step method. The as-prepared NiFe-BTC/CCHH/NF nanocomposite displayed excellent OER performance with an overpotential of 270 mV at a current density of 50 mA cm −2 and good stability in 1.0 M KOH. To construct an overall water splitting electrolytic cell, the phosphorization product of CCHH/NF (P-CCHH/NF) with high catalytic activity for hydrogen evolution reaction (HER) was used as the cathode. The water splitting electrolytic cell with NiFe-BTC/CCHH/NF as anode and P-CCHH/NF as cathode was highly efficient and stable, which only needed a voltage of 1.55 V to reach a current density of 10 mA cm −2 . This multi-pronged approach is expected to inspire other researchers to design high-performance OER catalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-18
·
IF 10.6
Chen Yukun,Chen Yuanyuan,Wang Zhenzhi,Yang Lian,Zhang Yu,Zhang Zhanxia,Jia Lijun
Reversing the hypoxic microenvironment of tumors is an important method to enhance the synergistic effect of tumor treatment. In this work, we developed the nanoparticles called Ce6@HGMOF, which consists of a photosensitizer (Ce6), glucose oxidase (GOX), chemotherapy drugs (HCPT) and an iron-based metal-organic framework (MOF). Ce6@HGMOF can consume glucose in tumor cells through “starvation therapy”, cut off their nutrition source, and produce gluconic acid and hydrogen peroxide (H 2 O 2 ). Utilizing this feature, Ce6@HGMOF can produce oxygen through catalase-like catalytic activity, thereby reversing the hypoxic microenvironment of tumors. This strategy of changing the hypoxic environment can help to slow down the growth of tumor blood vessels and improve the drug-resistant microenvironment to some extent. Meanwhile, increasing the supply of oxygen can enhance the effect of photodynamic therapy (PDT) and enhance the oxidative stress damage caused by reactive oxygen species (ROS) in tumor cells. On the other hand, cancer cells usually produce higher levels of glutathione (GSH) to adapt to high oxidative stress and protect themselves. The Ce6@HGMOF we designed can also consume GSH and induce ferroptosis of tumor cells through Fenton reaction with H 2 O 2 , while enhancing the effect of PDT. This innovative synergistic strategy, the combination of PDT/ferroptosis /starvation therapy, can complement each other and enhance each other. It has great potential as a powerful new anti-tumor paradigm in the future.
研究领域:
纳米技术
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癌症治疗
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生物医学工程
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药学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）