Bai Shouli, Jia Shiyu, Zhao Yingying, Tang Pinggui, Feng Yongjun, Luo Ruixian, Li Dianqing, Chen Aifan
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing 100029, China.
Inorg Chem. 2023 Sep 18;62(37):15039-15049. doi: 10.1021/acs.inorgchem.3c01818. Epub 2023 Aug 31.
Ti-doped α-FeO nanorods were prepared by a facile hydrothermal method, followed by a NiFe-LDH catalyst that was electrodeposited on the doped α-FeO nanorods to structure an integrating photoanode Ti:FeO/NiFe-LDH for improving solar PEC water-splitting efficiency. The structure and properties of electrode materials were characterized and the PEC properties of photoanodes were measured. The results show that the photocurrent density of the photoanode enhances 11.25 times at 1.23 V ( RHE) and the IPCE value enhances 4.10 times at 420 nm compared with pristine α-FeO. The enhancement is attributed to the separating of photogenerated electron-hole, the increase of carrier density, and the acceleration of the carrier transfer rate due to the dual action of doping and catalysis.
通过简便的水热法制备了掺钛α-FeO纳米棒，随后在掺杂的α-FeO纳米棒上电沉积NiFe-LDH催化剂，构建了集成光阳极Ti:FeO/NiFe-LDH，以提高太阳能光电化学水分解效率。对电极材料的结构和性能进行了表征，并测量了光阳极的光电化学性能。结果表明，与原始α-FeO相比，该光阳极在1.23 V（RHE）时的光电流密度提高了11.25倍，在420 nm处的IPCE值提高了4.10倍。这种增强归因于光生电子-空穴的分离、载流子密度的增加以及掺杂和催化双重作用导致的载流子转移速率的加快。
