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Cobalt and nitrogen co-doped mesoporous carbon for electrochemical hydrogen peroxide sensing: the effect of graphitization
Analyst ( IF 4.2 ) Pub Date : 2021-2-11 , DOI: 10.1039/d0an02473b Bin Yan 1, 2, 3, 4, 5 , Sasa Gu 1, 2, 3, 4, 5 , Yuesong Shen 1, 2, 3, 4, 5
Analyst ( IF 4.2 ) Pub Date : 2021-2-11 , DOI: 10.1039/d0an02473b Bin Yan 1, 2, 3, 4, 5 , Sasa Gu 1, 2, 3, 4, 5 , Yuesong Shen 1, 2, 3, 4, 5
Affiliation
In this study, a facile strategy for the scalable synthesis of cobalt and nitrogen co-doped mesoporous carbon (Co–N/C) is reported. Structural characterization demonstrated that Co and N were successfully co-doped in the highly porous carbon. Graphitization of porous carbon was achieved by the introduction of cobalt species. The degree of graphitization of Co–N/C could be further promoted by increasing the calcination temperature. By taking advantage of the excellent mass and electron transfer kinetics attributed to the high specific surface area, high porosity and high graphitization, the obtained Co–N/C exhibited good electrochemical activity towards H2O2 reduction and excellent sensing performance for the electrochemical detection of H2O2. The Co–N/C-950 catalyst obtained at 950 °C showed good electrochemical sensing performance with a detection limit of 2 μM and a wide linear response over the concentration range from 0.03 mM to 13 mM. Meanwhile, Co–N/C exhibited high selectivity toward the detection of H2O2 in the presence of possible interferences during the applications such as NaCl, glucose, ascorbic acid and so on. The results confirm that Co–N/C could be used as an efficient electrocatalyst to fabricate electrochemical sensing devices.
中文翻译:
钴和氮共掺杂介孔碳用于电化学过氧化氢传感:石墨化的影响
在这项研究中,报道了一种可行的可扩展合成钴和氮共掺杂介孔碳(Co–N / C)的策略。结构表征表明,Co和N成功地共掺杂在高度多孔的碳中。多孔碳的石墨化是通过引入钴来实现的。通过提高煅烧温度可以进一步提高Co-N / C的石墨化程度。通过利用归因于高比表面积,高孔隙率和高石墨化的优异质量和电子传递动力学,所得Co-N / C对H 2 O 2还原表现出良好的电化学活性,并且对于电化学检测具有出色的传感性能的H 2 O 2。在950°C下获得的Co-N / C-950催化剂表现出良好的电化学传感性能,检测限为2μM,在0.03 mM至13 mM的浓度范围内具有宽线性响应。同时,在NaCl,葡萄糖,抗坏血酸等应用中可能存在干扰的情况下,Co-N / C对H 2 O 2的检测具有很高的选择性。结果证实,Co-N / C可以用作制造电化学传感设备的有效电催化剂。
更新日期:2021-02-23
中文翻译:
钴和氮共掺杂介孔碳用于电化学过氧化氢传感:石墨化的影响
在这项研究中,报道了一种可行的可扩展合成钴和氮共掺杂介孔碳(Co–N / C)的策略。结构表征表明,Co和N成功地共掺杂在高度多孔的碳中。多孔碳的石墨化是通过引入钴来实现的。通过提高煅烧温度可以进一步提高Co-N / C的石墨化程度。通过利用归因于高比表面积,高孔隙率和高石墨化的优异质量和电子传递动力学,所得Co-N / C对H 2 O 2还原表现出良好的电化学活性,并且对于电化学检测具有出色的传感性能的H 2 O 2。在950°C下获得的Co-N / C-950催化剂表现出良好的电化学传感性能,检测限为2μM,在0.03 mM至13 mM的浓度范围内具有宽线性响应。同时,在NaCl,葡萄糖,抗坏血酸等应用中可能存在干扰的情况下,Co-N / C对H 2 O 2的检测具有很高的选择性。结果证实,Co-N / C可以用作制造电化学传感设备的有效电催化剂。