s: A new method for the preparation of an organic-inorganic composite film of the heteropolyanion has been developed by modifying P(Mo2O7)6-7 to the indium tin oxide (ITO) electrode surface. The modified electrode dis...s: A new method for the preparation of an organic-inorganic composite film of the heteropolyanion has been developed by modifying P(Mo2O7)6-7 to the indium tin oxide (ITO) electrode surface. The modified electrode displayed a strong catalytic activity towards the reduction of IO3-. In the range of 1.0?0-6~5?0-4mol/L, the catalytic current was linear proportional to the IO3- concentration.展开更多
目的:研究肾卜腺素(EP)在β-环糊精修饰聚乙酰苯胺玻碳电极(β-CD/PNAANI/GCE)上的电化学行为,建立一种新的测定 EP 的电化学分析方法。方法:用循环伏安法研究 EP 在修饰电极上的氧化还原特性,用差分脉冲伏安法直接测定肾上腺素的含量...目的:研究肾卜腺素(EP)在β-环糊精修饰聚乙酰苯胺玻碳电极(β-CD/PNAANI/GCE)上的电化学行为,建立一种新的测定 EP 的电化学分析方法。方法:用循环伏安法研究 EP 在修饰电极上的氧化还原特性,用差分脉冲伏安法直接测定肾上腺素的含量。结果:该修饰电极能很好地催化 EP,与裸玻碳电极(GCE)相比,还原峰电流增强近30倍。在 pH 7.5磷酸盐缓冲液中,还原峰电流与 EP 的浓度在6.0×10^(-6)～1.0×10^(-4) mol·L^(-1)范围内呈良好的线性关系,其线性回归方程为 I_p=1.68+6.92×10^(-6)C_(EP),相关系数为0.9975,检测限为1.0×10^(-7)mol·L^(-1)。回收率在97.5%～104.5%之间。结论:该方法操作简单,可用于注射液中盐酸肾上腺素含量的测定,结果令人满意。展开更多
Electrochemical CO_(2) reduction driven by renewable electricity is one of the promising strategies to store sus-tainable energy as fuels.However,the selectivity of value-added multi-carbon products remains poor for f...Electrochemical CO_(2) reduction driven by renewable electricity is one of the promising strategies to store sus-tainable energy as fuels.However,the selectivity of value-added multi-carbon products remains poor for further application of this process.Here,we regulate CO adsorption by forming a Nafion layer on the copper(Cu)electrode that is repulsive to OH^(-),contributing to enhanced selectivity of CO_(2) reduction to C_(2) products with the suppression of C 1 products.The operando Raman spectroscopy indicates that the local OH^(-)would adsorb on part of active sites and decrease the adsorption of CO.Therefore,the electrode with repulsive to OH^(-)can adjust the concentration of OH^(-),leading to the increased adsorption of CO and enhanced C–C coupling.This work shows that electrode design could be an effective strategy for improving the selectivity of CO_(2) reduction to multi-carbon products.展开更多
基金Authors greatly appreciate the supports from the National Natural Science Foundation of China Returnee Foundation of Ministry of Education of China and Analytical Foundation of Nanjing University.
文摘s: A new method for the preparation of an organic-inorganic composite film of the heteropolyanion has been developed by modifying P(Mo2O7)6-7 to the indium tin oxide (ITO) electrode surface. The modified electrode displayed a strong catalytic activity towards the reduction of IO3-. In the range of 1.0?0-6~5?0-4mol/L, the catalytic current was linear proportional to the IO3- concentration.
文摘目的:研究肾卜腺素(EP)在β-环糊精修饰聚乙酰苯胺玻碳电极(β-CD/PNAANI/GCE)上的电化学行为,建立一种新的测定 EP 的电化学分析方法。方法:用循环伏安法研究 EP 在修饰电极上的氧化还原特性,用差分脉冲伏安法直接测定肾上腺素的含量。结果:该修饰电极能很好地催化 EP,与裸玻碳电极(GCE)相比,还原峰电流增强近30倍。在 pH 7.5磷酸盐缓冲液中,还原峰电流与 EP 的浓度在6.0×10^(-6)～1.0×10^(-4) mol·L^(-1)范围内呈良好的线性关系,其线性回归方程为 I_p=1.68+6.92×10^(-6)C_(EP),相关系数为0.9975,检测限为1.0×10^(-7)mol·L^(-1)。回收率在97.5%～104.5%之间。结论:该方法操作简单,可用于注射液中盐酸肾上腺素含量的测定,结果令人满意。
基金This work was supported by the following projects:INTERNATIONAL COOPERATION Projects of the Ministry of Science and Technology(2014DFE60170)the Strategic Japanese-Swiss Science and Technology Program from the Swiss National Science Foundation(project No.IZJSZ2_180176)+4 种基金the Sino-Swiss Science and Technology Cooperation(SSSTC)2016 project from the Swiss National Science Foundation(project No.IZLCZ2_170294)the National Natural Science Foundation of China(Grant No.61674084)the Overseas Expertise Introduction Project for DisciplineInnovation of Higher Education of China(Grant No.B16027)Tianjin Science and Technology Project(Grant No.18ZXJMTG00220)the Fundamental Research Fund for the Central Universities of China.
文摘Electrochemical CO_(2) reduction driven by renewable electricity is one of the promising strategies to store sus-tainable energy as fuels.However,the selectivity of value-added multi-carbon products remains poor for further application of this process.Here,we regulate CO adsorption by forming a Nafion layer on the copper(Cu)electrode that is repulsive to OH^(-),contributing to enhanced selectivity of CO_(2) reduction to C_(2) products with the suppression of C 1 products.The operando Raman spectroscopy indicates that the local OH^(-)would adsorb on part of active sites and decrease the adsorption of CO.Therefore,the electrode with repulsive to OH^(-)can adjust the concentration of OH^(-),leading to the increased adsorption of CO and enhanced C–C coupling.This work shows that electrode design could be an effective strategy for improving the selectivity of CO_(2) reduction to multi-carbon products.
