Detection of Phosphate in Human Blood Based on a Catalytic Hydrogen Wave at a Molybdenum Phosphide Modified Electrode
Detection of Phosphate in Human Blood Based on a Catalytic Hydrogen Wave at a Molybdenum Phosphide Modified Electrode
复制标题
基于磷化钼修饰电极催化氢波检测人体血液中的磷酸盐
DOI：
10.1021/acs.analchem.9b03862
复制
发表时间：
2019
影响因子：
7.4
通讯作者：
Li Meixian
中科院分区：
文献类型：
--
作者：
Zhang Jinxuan;Bian Yixuan;Liu Di;Zhu Zhiwei;Shao Yuanhua;Li Meixian
无机磷酸盐的检测在环境和医疗保健应用中非常重要。在这项工作中，我们发现在磷酸盐存在下，磷化钼（MoP）修饰电极上出现了类似于“催化析氢波”的现象，即在正常析氢反应之前出现了新的催化析氢波。催化氢波产生于类似于磷钼酸（记为MoPO）的结构，它是由MoP修饰电极表面的磷酸盐和氧化钼相互作用形成的，导致表面结构的改变和界面催化活性的调整。基于这一现象构建了一种新型磷酸盐电化学传感器，线性范围为0.10～20.0 mmol·L–1，实际测定最低浓度为0.030 mmol·L–1，回收率为94%～107%，并成功应用于人体血液中磷酸盐的检测。此外，这项工作提出了一种基于修饰电极上催化氢波的新传感方法。
Detection of inorganic phosphate is very important in environmental and health care applications. In this work, we found that phenomenon similar to “catalytic hydrogen wave” occurred on a molybdenum phosphide (MoP) modified electrode in the presence of phosphate, that is, a new wave of catalytic hydrogen evolution appeared before the normal hydrogen evolution reaction. The catalytic hydrogen wave arose from a structure similar to phosphomolybdic acid (noted as MoPO), which was formed by the interaction between phosphate and molybdenum oxides on the surface of the MoP modified electrode, resulting in the altered surface structure and adjusted interface catalytic activity. A novel phosphate electrochemical sensor was constructed based on this phenomenon with a linear range from 0.10 to 20.0 mmol·L–1, an actually determined minimum concentration of 0.030 mmol·L–1, and recoveries of 94%–107%, and this sensor was successfully applied to the detection of phosphate in human blood. Furthermore, this work proposes a new sensing method based on catalytic hydrogen waves on the modified electrodes.