Corresponding Author

Xiao-li XIONG(xiongxiaoli2000@163.com);
Xu-ping SUN(xpsun@uestc.edu.cn)


Nitrite has a negative impact on the environment and human health. The long-term consumption of nitrite-containing foods has a carcinogenic risk. Therefore, the analysis and detection of nitrite are important. It is of great significance to develop high-efficiency electrocatalysts to achieve high sensitivity and selectivity for nitrite detection. The cobalt phosphide nano-array (CoP/TM) was obtained by hydrothermal and low-temperature phosphating. The electrochemical test results show that the constructed CoP/TM was a highly efficient electrochemical reduction nitrite catalyst with the excellent sensing performance and response time less than 3 s, as well as the linear detection range of 1.0 μmol·L-1 to 1.0 mmol·L-1 and lower detection limit of 18 nmol·L-1 (S/N = 3). The response sensitivity was 17718 μA·(mmol·L-1)-1·cm-2 with the satisfactory selectivity.

Graphical Abstract


CoP, nanoarray, nitrite, electrochemical, sensor

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