CHEMICAL PHYSICS LETTERS
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2023
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IF 2.8
Huaqing Lin,Ming Yin,Chenjie Yang,Dongpo Xu,Chunhui Deng
Laser desorption/ionisation mass spectrometry (LDI-MS) can be used as an effective detection method for the analysis of more complex samples. However, the organic matrix of conventional LDI-MS produces large background interference and poor signal results, which hinders its application in metabolomics. Surface reconstruction can improve the performance of LDI-MS. In this study, mesoporous NiO@Pt nanofibre membranes were synthesised by a simple and efficient electrostatic spinning strategy and used as a matrix to significantly increase the intensity of mass spectrometry peaks. Metabolomic analysis of saliva samples from 18 smokers and 15 non-smokers was able to clearly distinguish the differences in salivary metabolism between smokers and non-smokers and showed good results in the qualitative analysis of salivary metabolism in smokers. Our study provides a rapid and convenient method for differentiating differences in salivary metabolism in smokers.
研究领域:
分析化学
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代谢组学
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医学诊断
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产品关联
DOI
高影响因子
Nanoscale
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2022
·Vol. 14
·期 28
·10118-10124
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IF 8.307
Ruigan Hu,Mengyuan Zhao,He Miao,Fuyue Liu,Jiaqun Zou,Chunfei Zhang,Qin Wang,Ziqi Tian,Qiuju Zhang,Jinliang Yuan
As a potential oxygen evolution reaction (OER) catalyst, Co-based perovskites have received intensive attention. However, Sr readily accumulates on their surface, and makes them inert toward the OER. Herein, we propose a simple but versatile electrochemical reduction method to reconstruct the active surface of Co-based perovskites within a few seconds. By this method, Sr rapidly precipitates from Co-based perovskites, accompanied by the introduction of Sr and oxygen vacancies. After reconstruction, the electrochemical active surface areas of Co-based perovskites greatly increase, and the OER overpotential of the optimized SrNb0.1Co0.7Fe0.2O3−δ (ER-SNCF-20s) reaches 278 mV at 10 mA cm−2. This can be explained by the decrease of overpotentials at the rate-determining step. Using ER-SNCF-20s, the splitting voltage of alkaline natural seawater can reach 1.56 V at 10 mA cm−2, and remains steady for 300 h. This effort offers a feasible method for reconstructing the active surface of Co-based perovskites.
研究领域:
材料科学
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电化学
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可再生能源
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
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IF 4.598
Tianyu Li,Zhichao Ye,Yu Cai,Tingting Tu,Bin Zhang,Shanshan Zhang,Lu Fang,Xiyu Mao,Shiyi Xu,Xuesong Ye,Bo Liang
Conductive hydrogels have shown promise in a wide range of electrochemical sensing applications. Decorating conductive hydrogel on the electrode surface is a key technical challenge. Herein, we have constructed a method to achieve better and stable attachment between conductive hydrogel and electrode by surface rebuilding technique. Electrochemical gelation of poly(3,4-ethylenedioxythiophene): poly(4-styrenesulfonate) (PEDOT:PSS) hydrogels on gold electrodes that have undergone surface rebuilding method were then made into several biosensors for electrochemical sensing of H 2 O 2 , glucose, dopamine (DA) and levodopa (L-Dopa) respectively. The H 2 O 2 sensor shown a linear range from 0 to 1 mM with ultrahigh sensitivity of 1988.66 μA⋅cm −2 ⋅mM −1 . The sensor responded to glucose ranging from 0 to 14 mM with high sensitivity of 198.047 μA⋅cm −2 ⋅mM −1 . The sensor responded to DA ranging from 0 to 1 mM with high sensitivity of 145.047 μA⋅cm −2 ⋅mM −1 , and to L-Dopa ranging from 0 to 0.5 mM with high sensitivity of 982.21 μA⋅cm −2 ⋅mM −1 . We initially verify the gold surface rebuilding method in solving the problem of difficult combination of electrochemical mediated hydrogel and electrode, the method could be explored further for various promising applications in hydrogel electronics in the future.
研究领域:
材料科学
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电化学
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生物传感器
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分析化学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
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2025
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IF 4.6
Kaiwen Tan,Jingyu Zhang,Xinghan Liu,Jinming Li,Jun Gong,Yonggang Tong,Shiyun Xiong,Gufei Zhang,Yejun Li
For NiFe-based precatalysts, there is a general consensus that they will undergo reconstruction to generate NiFe (oxy)hydroxides as real active sites during the electrochemical oxygen evolution reaction (OER), but the current understanding of the reconstruction process is still far from satisfactory. Herein, iron phosphates/molybdates on nickel foams (FPmM/NF, m = 5, 7, 10, 20) were prepared via a coprecipitation method, where although both MoO42– and PO43– undergo anion exchange during the activation process, i.e., dual reconstructions, to form NiFe (oxy)hydroxides, they show disparate reconstruction dynamics. By tuning the phosphates/molybdates ratio, the morphology, activity, and activation rate of the formed NiFe (oxy)hydroxides can be tuned. Consequently, the obtained optimal FP7M/NF-activated (FP7M/NF-a) possesses a fast and deep reconstruction with a morphology of nanoparticles with a disordered structure and rich oxygen vacancies, thus exhibiting exceptional OER activity (overpotentials of only 175 and 180 mV at 50 and 100 mA·cm–2) and excellent stability.
研究领域:
电化学
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材料科学
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催化
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能量转换
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表面重建
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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）