催化作用
光催化
选择性
电化学
离解(化学)
纳米晶
过氧化氢
吸附
组合化学
电催化剂
化学工程
钯
材料科学
化学
光化学
纳米技术
电极
有机化学
物理化学
工程类
作者
Yang Tang,Chengyong Yang,Jia-Bo Le,Zhiyong Yu,Lingzheng Bu,Leigang Li,Shuxing Bai,Qi Shao,Zhiwei Hu,Chih-Wen Pao,Jun Cheng,Yusheng Feng,Xiaoqing Huang
出处
期刊:Nano Research
[Springer Nature]
日期:2021-08-17
卷期号:15 (3): 1861-1867
被引量:8
标识
DOI:10.1007/s12274-021-3786-0
摘要
Although high-efficiency production of hydrogen peroxide (H2O2) can be realized separately by means of direct, electrochemical, and photocatalytic synthesis, developing versatile catalysts is particularly challenging yet desirable. Herein, for the first time we reported that palladium-sulphur nanocrystals (Pd-S NCs) can be adopted as robust and universal catalysts, which can realize the efficient O2 conversion by three methods. As a result, Pd-S NCs exhibit an excellent selectivity (89.5%) to H2O2 with high productivity (133.6 mol·kgcat−1h−1) in the direct synthesis, along with the significantly enhanced H2O2 production activity and stability via electrocatalytic and photocatalytic syntheses. It is demonstrated that the isolated Pd sites can enhance the adsorption of O2 and inhibit its O-O bond dissociation, improving H2O2 selectivity and reducing H2O2 degradation. Further study confirms that the difference in surface atom composition and arrangement is the key factor for different ORR mechanisms on Pd NCs and Pd-S NCs.
科研通智能强力驱动
Strongly Powered by AbleSci AI