Distinct Promotion of PEC Water Oxidation of Ta2O5/α-Fe2O3/Co–Ni PBA via Coupling Ni 3d with O 2pClick to copy article linkArticle link copied!
- Yuan GuanYuan GuanJiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. ChinaMore by Yuan Guan
- Qiankun DengQiankun DengJiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. ChinaMore by Qiankun Deng
- Dayu WuDayu WuJiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. ChinaMore by Dayu Wu
- Shaomang Wang*Shaomang Wang*Email: [email protected]School of Urban Construction, Changzhou University, Changzhou 213164, P. R. ChinaMore by Shaomang Wang
- Zhongyu LiZhongyu LiJiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. ChinaMore by Zhongyu Li
- Shicheng Yan*Shicheng Yan*Email: [email protected]Eco-Materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. ChinaMore by Shicheng Yan
- Zhigang ZouZhigang ZouEco-Materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. ChinaMore by Zhigang Zou
Abstract

The development of robust and effective photoanodes is crucial for photoelectrochemical hydrogen production via total water splitting. Herein, the Ta2O5/α-Fe2O3/Co–Ni PBA (TFPB-1) photoanode was constructed by the compositing n-type Ta2O5 and n-type α-Fe2O3 followed by the deposition of p-type Co–Ni PBA. The IPCE of TFPB-1 was increased to 35.4% compared to 13.9% for Ta2O5 owing to the significantly improved light absorption efficiency, carrier separation efficiency and injection efficiency. The TFPB-1 achieved a current density of 2.78 mA cm–2 at 1.23 V (vs RHE), which was around 18.5 times that of Ta2O5. The OER overpotential over TFPB-1 was reduced to 0.59 V compared to 1.13 V for Ta2O5, resulting in a substantial reduction in the free energy of PEC water oxidation over TFPB-1. As a result, TFPB-1 exhibited remarkably enhanced photoelectrocatalytic activity for oxygen evolution through water oxidation.
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