光电流
材料科学
纳米棒
面(心理学)
二氧化钛
分解水
能量转换效率
电场
催化作用
可逆氢电极
电极
光电子学
基质(水族馆)
人工光合作用
化学工程
纳米技术
光催化
电化学
工作电极
复合材料
人格
化学
物理
物理化学
工程类
地质学
五大性格特征
海洋学
社会心理学
量子力学
生物化学
心理学
作者
Yang An,Jingxuan Hao,Lin Cheng,Shaowei Zhang,Kan Zhang,Yulin Min
标识
DOI:10.1021/acsami.2c12181
摘要
Rational construction of electric field via assembling appropriate co-catalysts on anisotropic facets is of great significance for improving the photogenerated charge separation efficiency. However, this strategy usually gives rise to Fermi-level pinning which is not contributive to the charge separation but deleterious to the photoelectrochemical performance through consuming the measurable photovoltage. Herein, we demonstrate that manganese dioxide electrodeposited on the (111) facet of titanium dioxide nanorods could tremendously boost the catalytic activity of pristine photoanode via a stronger interface electric field and less photovoltage decay compared with the counterpart grown on the (110) facet. A photocurrent density of 1.65 mA·cm-2 at 1.23 V (vs reversible hydrogen electrode), nearly the theoretical maximum of titanium dioxide, is achieved by the optimum photoanode with an extremely high separation efficiency of 95.15%. This study offers more in-depth insights into the design of carrier separation strategy through loading co-catalysts on different substrate surfaces for more efficient solar energy conversion.
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