High-density triple-phase contact points for enhanced photocatalytic CO2 reduction to methanol

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外文摘要：The efficiency of photocatalytic CO2 reduction reaction(PCRR)is restricted by the low solubility and mo-bility of CO2 in water,poor CO2 adsorption capacity of catalyst,and competition with hydrogen evolution reaction(HER).Recently,hydrophobic modification of the catalyst surface has been proposed as a po-tential solution to induce the formation of triple-phase contact points(TPCPs)of CO2(gas phase),H2O(liquid phase),and catalysts(solid phase)near the surface of the catalyst,enabling direct delivery of highly concentrated CO2 molecules to the active reaction sites,resulting in higher CO2 and lower H+sur-face concentrations.The TPCPs thus act as the ideal reaction points with enhanced PCRR and suppressed HER.However,the initial synthesis of triple-phase photocatalysts tends to possess a lower bulk density of TPCPs due to the simple structure leading to limited active points and CO2 adsorption sites.Here,based on constructing a hydrophobic hierarchical porous TiO2(o-HPT)with interconnected macropores and mesopores structure,we have significantly increased the density of TPCPs in a unit volume of the pho-tocatalyst.Compared with hydrophobic macroporous TiO2(o-MacPT)or mesoporous TiO2(o-MesPT),the o-HPT with increased TPCP density leads to enhanced photoactivity,enabling a high methanol production rate with 1111.5 μmol g-1 h-1 from PCRR.These results emphasize the significance of high-density TPCPs design and propose a potential path for developing efficient PCRR systems.

外文关键词：

PhotocatalysisCO2 reduction reactionPhotocatalystTriple-phase contact pointsMethanol

作者：

Hanwen Jian、Kaiming Deng、Tongyu Wang、Chengxi Huang、Fang Wu、Hailing Huo、Bo Ouyang、Xuan Liu、Jingjing Ma、Erjun Kan、Ang Li

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作者单位：

MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,School of Science,Nanjing University of Science and Technology,Nanjing 210094,China

College of Information Science and Technology,Nanjing Forestry University,Nanjing 210037,China

State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan 750021,China

基金：

国家自然科学基金国家自然科学基金国家自然科学基金National Outstanding Youth Science Fund Project of National Natural Science Foundation of China中央高校基本科研业务费专项中央高校基本科研业务费专项Foundation of State Key Laboratory of Highefficiency Utilization of Coal and Green Chemical EngineeringFunding of NJUST

项目编号：

220081211177417351790492T212500430920032204309200411152022-K12TSXK2022D002

出版年：

2024

DOI：

10.1016/j.cclet.2023.108651

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(2)

参考文献量55