Amorphous CoOx coupled carbon dots as a spongy porous bifunctional catalyst for efficient photocatalytic water oxidation and CO2 reduction

作     者：Wanjun Sun Xiangyu Meng Chunjiang Xu Junyi Yang Xiangming Liang Yinjuan Dong Congzhao Dong Yong Ding 孙万军;孟翔宇;徐春江;杨峻懿;梁向明;董银娟;董聪朝;丁勇

作者机构：State Key Laboratory of Applied Organic ChemistryKey Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Provinceand College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000GansuChina State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000GansuChina 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2020年第41卷第12期

页      面：1826-1836页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：国家自然科学基金(21773096) 兰州大学中央高校基本科研业务费(lzujbky-2018-k08) 甘肃省自然科学基金(17JR5RA186) 

主　　题：Carbon dots coupled CoOx Bifunctional photocatalyst Water oxidation CO2 reduction Synergistic effect 

摘      要：Cobalt-based oxides,with high abundance,good stability and excellent catalytic performance,are regarded as promising photocatalysts for artificial photosynthetic systems to alleviate foreseeable energy shortages and global ***,for the first time,a series of novel spongy porous CDs@CoOx materials were synthesized to act as an efficient and stable bifunctional photocatalyst for water oxidation and CO2 ***,the preparation temperatures visibly influence the morphologies and photocatalytic performances of the CDs@*** the optimal conditions,a maximum O2 yield of 40.4% and pretty apparent quantum efficiency(AQE)of 58.6% at 460 nm were obtained over CDs@CoOx-300 for water ***,the optimized sample CDs@CoOx-300 manifests significant enhancement on the CO2-to-CO conversion with a high selectivity of 89.3% and CO generation rate of 8.1μmol/h,which is superior to most previous cobalt-based catalysts for CO2 *** composite CDs@CoOx-300 not only exposes more active sites but also facilitates electron transport,which results in excellent photocatalytic *** addition,the boosted photocatalytic behavior is attributed to the synergistic effect between CoOx and CDs,which was verified by the photocatalytic activity control experiments and electrochemical *** work offers a novel strategy to fabricate a high performance bifunctional photocatalyst for water oxidation and CO2 reduction.