电催化剂
过氧化氢
掺杂剂
兴奋剂
密度泛函理论
氧气
电合成
无机化学
材料科学
化学
选择性
氢
光化学
催化作用
电化学
物理化学
计算化学
有机化学
电极
光电子学
作者
Zhiqin Deng,Li Li,Yuchun Ren,Chaoqun Ma,Jie Liang,Kai Dong,Qian Liu,Yonglan Luo,Tingshuai Li,Bo Tang,Yang Liu,Shuyan Gao,Abdullah M. Asiri,Shihai Yan,Xuping Sun
出处
期刊:Nano Research
[Springer Nature]
日期:2022-01-11
卷期号:15 (5): 3880-3885
被引量:39
标识
DOI:10.1007/s12274-021-3995-6
摘要
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.
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