异质结
纳米棒
材料科学
光电子学
氮化物
分解水
光电流
纳米技术
光催化
图层(电子)
化学
生物化学
催化作用
作者
Yuriy Pihosh,Vikas Nandal,Tsutomu Minegishi,Masao Katayama,Taro Yamada,Kazuhiko Seki,Masakazu Sugiyama,Kazunari Domen
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2020-06-29
卷期号:5 (8): 2492-2497
被引量:61
标识
DOI:10.1021/acsenergylett.0c00900
摘要
Heterostructure-based photoanodes have been investigated to enhance light absorption and promote the generation and extraction of charge carriers for efficient solar-to-hydrogen energy conversion. Oxy(nitride) semiconducting materials are promising candidates to harvest the visible solar spectrum; however, the realization of stable and efficient oxy(nitride) heterostructure-based photoanodes remains a challenge. Here, we demonstrate a core–shell heterojunction photoanode of Ta3N5-nanorods/BaTaO2N that is obtained by combining glancing angle deposition and dip coating techniques. The heterojunction photoanode homogeneously covered by a FeNiOx cocatalyst (Ta3N5-NRs/BaTaO2N/FeNiOx) generates a stable photocurrent of ∼4.5 mA cm–2 at 1.23 VRHE under simulated AM 1.5G sunlight. The stoichiometric evolution of O2 and H2 from water occurs steadily over an hour when the covered heterojunction photoanode is connected to a Pt counter electrode with faradaic efficiencies of 90%–95%. This work may open a new path to fabricating efficient and stable oxy(nitride) photoactive materials for solar energy conversion.
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