文献类型：期刊文献

英文题名：Gd-doped CuBi2O4/CuO heterojunction film photocathodes for photoelectrochemical H2O2 production through oxygen reduction

作者：Li, Zixin[2];Xu, Quanlong[2];Gou, Faliang[1];He, Bing[1];Chen, Wei[2];Zheng, Weiwei[3];Jiang, Xu[1];Chen, Kai[1];Qi, Chenze[1];Ma, Dekun[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Wenzhou Univ, Zhejiang Key Lab Carbon Mat, Wenzhou 325027, Peoples R China;[3]Syracuse Univ, Dept Chem, Syracuse, NY 13244 USA

年份：2021

卷号：14

期号：10

起止页码：3439

外文期刊名：NANO RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000667608500007)、、EI(收录号：20212710589205)、Scopus(收录号：2-s2.0-85109037249)、WOS

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 21673160 and 12075154), Natural Science Foundation of Zhejiang for Distinguished Young Scholars (No. LR16B010002), and startup funds of Shaoxing University.

语种：英文

外文关键词：CuBi2O4; Gd3+ ions doping; O-2 reduction reaction; H2O2 production; photoelectrochemical cell

外文摘要：Photoelectrochemical oxygen reduction reaction (ORR) toward H2O2 is highly desirable because only sunlight, O-2 and water are required in the process. However, the corresponding studies are still at its infancy because of the lack of suitable photocathodes, especially inorganic semiconductor photocathodes. In this work, we report CuBi2O4/CuO (CBO/CuO) heterojunction submicrocrystalline film photocathodes with efficient ORR activity for H2O2 production. The heterojunction film photocathodes were prepared through thermal evaporation of Cu and Bi metals under vacuum and subsequent annealing treatment. Furthermore, the doping of Gd3+ ions into CBO/CuO could significantly enhance the yield of H2O2. As a result, the concentration of H2O2 could reach 1.3 mM within 30 min, which is 6 times higher than that obtained on the pristine CBO/CuO photocathode. The theoretical calculations suggested that the introduction of Gd could adjust the electronic structure of CBO surface and promote 2e ORR pathway for selective production of H2O2. Our work not only provides a new strategy for designing highly efficient photocathode for H2O2 production but also will evoke more interest in photoelectrocatalytic ORR through inorganic semiconductor photocathode.