光电流
氮化碳
分解水
基质(水族馆)
氮化物
可逆氢电极
碳纤维
纳米技术
材料科学
化学工程
电极
化学
光电子学
电化学
催化作用
物理化学
工作电极
光催化
复合材料
有机化学
复合数
工程类
地质学
海洋学
图层(电子)
作者
Xinghua Fan,Zhiliang Wang,Tongen Lin,Du Du,Mu Xiao,Peng Chen,Sabiha Akter Monny,Hengming Huang,Miaoqiang Lyu,Mingyuan Lu,Luyao Wang
标识
DOI:10.1002/ange.202204407
摘要
Abstract Construction of an intimate film/substrate interface is of great importance for a photoelectrode to achieve efficient photoelectrochemical performance. Inspired by coordination chemistry, a polymeric carbon nitride (PCN) film is intimately grown on a Ti‐coated substrate by an in situ thermal condensation process. The as‐prepared PCN photoanode exhibits a record low onset potential ( E onset ) of −0.38 V versus the reversible hydrogen electrode (RHE) and a decent photocurrent density of 242 μA cm −2 at 1.23 V RHE for water splitting. Detailed characterization confirms that the origin of the ultralow onset potential is mainly attributed to the substantially reduced interfacial resistance between the Ti‐coated substrate and the PCN film benefitting from the constructed interfacial sp 2 N→Ti coordination bonds. For the first time, the ultralow onset potential enables the PCN photoanode to drive water splitting without external bias with a stable photocurrent density of ≈9 μA cm −2 up to 1 hour.
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