In situ synthesis of sodium-doped polymeric carbon nitride photoanode with nitrogen defects for improved photoelectrochemical water splitting

被引：0

作者：

Li, Xiaochun ^{[1
]}

Wu, Wentao ^{[1
]}

Zhuang, Yuchen ^{[1
]}

Song, Wenjin ^{[1
]}

Guo, Teng ^{[1
]}

Chen, Ruijun ^{[1
]}

Duan, Jingjing ^{[1
]}

Liu, Sijie ^{[1
]}

Lan, Bang ^{[1
]}

Cao, Renping ^{[1
]}

机构：

[1] Jiaying Univ, Sch Chem & Environm, Northeast Guangdong Key Lab New Funct Mat, Meizhou 514015, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2025年 / 105卷

关键词：

Polymeric carbon nitride; Sodium doping; Nitrogen defects; Photoelectrochemical; Water splitting; PHOTOCATALYST;

D O I：

10.1016/j.ijhydene.2025.01.453

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photoelectrochemical (PEC) water splitting with polymeric carbon nitride (PCN) photoanodes presents a potential solution to energy crises, but further enhancements in efficiency and properties are required. This work demonstrates the effective in situ synthesis of a sodium-doped PCN photoanode with nitrogen defects (CNNaN), achieved through the utilization of cyano-rich sodium sulfocyanate (NaSCN) as the molten salt. The optimal CNNaN photoanode achieves a notable photocurrent density of ca. 343 mu A cm- 2 at 1.23 V vs. RHE under AM 1.5G illumination, which considerably exceeds that of the pristine CN (ca. 12 mu A cm- 2). This improvement can be attributed to the synergistic effect between Na ions and cyano groups within the CNNaN framework, which can enhance the light absorption capacity, augment the availability of active sites, and promote the effective charge transfer. Accordingly, this new approach may offer opportunities for the in situ development of cost-effective and high-performance PCN-based photoanodes.

引用

页码：1340 / 1347

页数：8

共 52 条

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