Localized CdS homojunctions with optimal ratio of high and low index facets to dynamically boost H_(2)O splitting into H_(2)energy  

作　　者：Xiaojun Wang Yiqi Zhang Shujuan Jiang Jiakun Su Shaoqing Song 

机构地区：[1]School of Materials Science&Chemical Engineering,Ningbo University,Ningbo 330013,China [2]School of New Energy,Ningbo University of Technology,Ningbo 315336,China [3]Tchnology Center,China Tobacco Jiangxi Industrial LLC,Nanchang 330096,China

出　　处：《Journal of Materials Science & Technology》2024年第4期94-100,共7页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51972177);the Natural Science Foundation of Ningbo City(No.2021J067);the SJLY2021010 of Ningbo University,Fan 3315 Plan,and Yongjiang Scholar Project.

摘　　要：Localized CdS homojunctions with optimal ratio of high and low index facets are constructed to dy-namically boost H_(2)O splitting into H_(2)energy by hydrothermal method in combination with calcination.By density functional theory,hall effect,and in situ diffuse reflectance infrared Fourier transform spec-troscopy,it is revealed that photo-irradiated e^(−)and h^(+)can be spatially separated and directionally trans-ferred to the reductive high-index facet{002}and oxidative low-index facet{110}of localized CdS homo-junction induced by Fermi level difference of both high and low index facets to dehydrogenate ^(∗)-OH and coupled ^(∗)-O intermediates for H_(2)and O_(2)yield,respectively,along with a solar conversion into hydrogen of 1.93%by AM 1.5 G irradiation at 65℃.The study work suggests a scientific perspective on the optimal ratio of high and low index facets to understand photo-generated charge carrier transfer dynamically and their photocatalytic principle for H_(2)O splitting reaction in kinetics.

关 键 词：Photocatalytic H_(2)evolution Homojunction Localized field Ratio of high low index facets In-situ DRIFTS 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]