光电流
材料科学
结晶度
能量转换效率
热液循环
电解质
赤铁矿
电极
化学工程
基质(水族馆)
分解水
制作
光电化学电池
纳米技术
光电子学
光催化
催化作用
化学
复合材料
冶金
物理化学
生物化学
海洋学
工程类
地质学
医学
替代医学
病理
作者
Haipeng Zhang,Yuqing He,Xiaolei Bao,Zhaoqi Wang,Weiyi Jiang,Lei Zheng,Yu–Chen Fan,Zhaoke Zheng,Hefeng Cheng,Peng Wang,Yuanyuan Liu,Zeyan Wang,Baibiao Huang
标识
DOI:10.1002/cssc.202300666
摘要
In this work, α-Fe2 O3 photoanode consisted of (110)-oriented α-Fe2 O3 single crystals were synthesized by a facile hydrothermal method. By using particular additive (C4 MimBF4 ) and regulation of hydrothermal reaction time, the Fe-25 consisted of a single-layer of highly crystalline (110)-oriented crystals with fewer grain boundaries, which was vertically grown on the substrate. As a result, the charge separation efficiency and photoelectrochemical (PEC) performance of Fe-25A (Fe-25 after dehydration treatment) have been greatly improved. Fe-25A yields a photocurrent of 1.34 mA cm-2 (1.23 V vs RHE) and an incident photon-to-current conversion efficiency (IPCE) of 31.95 % (380 nm). With the assistance of cobalt-phosphate water oxidation catalyst (Co-Pi), the PEC performance could be further improved by enhancing the holes transfer at electrode/electrolyte interface and inhibiting surface recombination. Fe-25A/Co-Pi yields a photocurrent of 2.67 mA cm-2 (1.23 V vs RHE) and IPCE value of 50.8 % (380 nm), which is 3.67 times and 2.39 times as that of Fe-2A/Co-Pi. Our work provides a simple method to fabricate highly efficient Fe2 O3 photoanodes consist of characteristic (110)-oriented single crystals with high crystallinity and high quality interface contact to enhance charge separation efficiencies.
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