Urotropine-triggered multi-reactive sites in carbon nanotubes towards efficient electrochemical hydrogen peroxide synthesis

被引:16
作者
Hu, Shangyu [1 ]
Zhan, Yaxiong [2 ]
Wang, Peilei [1 ]
Yang, Jingfei [1 ]
Wu, Fengxiu [1 ]
Dan, Meng [1 ,3 ]
Liu, Zhao-Qing [1 ]
机构
[1] Guangzhou Univ, Inst Clean Energy & Mat, Sch Chem & Chem Engn, Guangzhou Key Lab Clean Energy & Mat,Key Lab Water, Guangzhou 510006, Peoples R China
[2] Jiangxi Coinfa Technol Co Ltd, Nanchang 330009, Peoples R China
[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Shanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Electrocatalysis; Hydrogen peroxide production; end-on" Adsorption; Multi-reactive sites; Hydrogen bond effect; OXYGEN REDUCTION REACTION; 2-ELECTRON; GENERATION; CATALYSTS; H2O2;
D O I
10.1016/j.cej.2023.142906
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The production of hydrogen peroxide (H2O2) by electrochemical oxygen reduction is a clean and convenient route. Here, we develop a universal urotropine (hexamethylenetetramine) modified carbon-based catalyst strategy. Both experimental results and theoretical calculations proved that the introduction of urotropine not only provides the isolating O-2 active sites to protect OOH* from being further split, but also excites carbon nanotube matrix to produce rich secondary O-2 active sites. More importantly, the end-on type of adsorption of O-2 on excited secondary reactive sites can be stabilized by the hydrogen bond effect, which greatly increases the productivity of H2O2. As a result, the urotropine (hexamethylenetetramine) modified commercial carbon nanotubes (denoted as H-CNTs) catalyst achieved 95% selectivity and 748 mmol.g(catalyst).h(-1) yield of H2O2 at 0.7 V vs. RHE. Therefore, this work provides a highly potential urotropine modification strategy towards efficient electrochemical H2O2 synthesis.
引用
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页数:7
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