TY  - JOUR
AU  - Deng, Zhiqin
AU  - Li, Li
AU  - Ren, Yuchun
AU  - Ma, Chaoqun
AU  - Liang, Jie
AU  - Dong, Kai
AU  - Liu, Qian
AU  - Luo, Yonglan
AU  - Li, Tingshuai
AU  - Tang, Bo
AU  - Liu, Yang
AU  - Gao, Shuyan
AU  - Asiri, Abdullah M.
AU  - Yan, Shihai
AU  - Sun, Xuping
PY  - 2022
TI  - Highly efficient two-electron electroreduction of oxygen into hydrogen peroxide over Cu-doped TiO2
JO  - Nano Research
SN  - 1998-0124
SP  - 3880
EP  - 3885
VL  - 15
IS  - 5
AB  - Electrosynthesis of hydrogen peroxide (H2O2), as a sustainable alternative to the anthraquinone oxidation method, provides the feasibility of directly generating H2O2. Here, we report Cu-doped TiO2 as an efficient electrocatalyst which exhibits the excellent two-electron oxygen reduction reaction (2e− ORR) performance with respect to the pristine TiO2. The Cu doping results in the distortion of TiO2 lattice and further forms a large number of oxygen vacancies and Ti3+. Such Cu-doped TiO2 exhibits a positive onset potential about 0.79 V and high H2O2 selectivity about 91.2%. Moreover, it also shows a larger H2O2 yield and good stability. Density functional theory (DFT) calculations reveal that Cu dopant not only improves the electrical conductivity of pristine TiO2 but reduces the *OOH adsorption energy of active sites, which is beneficial to promote subsequently 2e− ORR process.
UR  - https://doi.org/10.1007/s12274-021-3995-6
DO  - 10.1007/s12274-021-3995-6