Porous microtubes of nickel-cobalt double oxides as non-enzymatic hydrogen peroxide sensors  

作　　者：Qin Li Jin Niu Meiling Dou Zhengping Zhang Feng Wang 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing Key Laboratory of Electrochemical Process and Technology for Materials,Beijing University of Chemical Technology,Beijing 100029,China [2]Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Chinese Chemical Letters》2021年第3期1181-1185,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51432003,51802011 and 51125007);the Start-Up Fund for Talent Introduction of Beijing University of Chemical Technology(No.buctrc201806);the Fundamental Research Funds for the Central Universities(No.JD2010)。

摘　　要：Non-enzymatic electrochemical sensors for the determination of hydrogen peroxide(H_(2)O_(2))have attracted more and more concerns.A series of nickel and cobalt double oxides(Ni_(x)Co_(y)-DO)with the different ratios of Ni/Co have been prepared by a polyol-mediated solvothermal method for H_(2)O_(2)detection.The obtained products exhibit honeycomb-like open porous microtubes constituted with the low-dimensional nanostructured Ni_(x)Co_(y)-DO blocks after the calcination treatment.Compared with nickel oxides,the introduced Co ions in Ni_(x)Co_(y)-DO can induce the production of surficial oxygen vacancies,and further enhance the electrode surface activity.In particular,the NiCo-DO sample(with an atomic ratio of Ni/Co=4:3)shows the richest surficial oxygen vacancies and presents the highest H_(2)O_(2)detection activity among all the as-prepared samples,demonstrating an excellent sensitivity of698.60μAL mmol^(-1)cm^(-2)(0~0.4 mmol/L),low detection limit(0.28μmol/L,S/N=3),as well as long stability,high selectivity and good reproducibility.This work lends a new impetus to the potential application of double metal oxides for the next generation of non-enzymatic sensors.

关 键 词：Double metal oxides Porous microtubes Oxygen vacancies Hydrogen peroxide detection Electrochemical sensors 

分 类 号：TQ123.6[化学工程—无机化工] O657.1[理学—分析化学] TP212[理学—化学]