The overall water splitting of CdS/Ti3+-SrTiO3 core–shell heterojunction via OER enhancement of MnOx nanoparticles
The overall water splitting of CdS/Ti3+-SrTiO3 core–shell heterojunction via OER enhancement of MnOx nanoparticles
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DOI：
10.1016/j.cej.2021.130357
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发表时间：
2021
影响因子：
15.1
通讯作者：
Jiaqi Pan;Zhanfen Chen;Panhong Wang;Peipei Wang;Qingtao Yu;Weijie Zhao;Jingjing Wang;Mei-An Zhu-Me
中科院分区：
文献类型：
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作者：
Jiaqi Pan;Zhanfen Chen;Panhong Wang;Peipei Wang;Qingtao Yu;Weijie Zhao;Jingjing Wang;Mei-An Zhu-Me
The OER process would be a mainly factor for restricting overall water splitting, so the matching of HER/OER would be an important issue. Herein, the MnOx/CdS/Ti3+-SrTiO3core–shell heterojunction is fabricated via a continuous hydrothermal-annealing-chemical-photodeposition method. Evaluated by the photocatalytic performance, the MnOx/CdS/Ti3+-SrTiO3exhibits an enhanced HER performance of about ~ 10 folds than that of pure SrTiO3nanosphere, and achieves a decent overall water splitting performance of about ~ 176.07(H2)/86.03(O2) μmol/g∙h, which can be mainly ascribed to the well matched HER/OER process and formation of heterojunction. There, the new potential induced by Ti3+/Ovcan increase the solar efficiency and accelerate the photo-generated electrons diffusion, the Ti3+ions can reduced water splitting activation barrier to enhance the H+reduction, the MnOxwith mixed chemical valance Mn3+/Mn4+ions can activate the holerelated species and promote the H2O2decomposition, and the core–shell CdS/Ti3+-SrTiO3heterojunction with appropriate potential gradient can improve the charge carrier separation and transport. Additionally, the core–shell structure can inhibit the photocorrosion to maintain good photocatalytic stability.
