Schiff-base-rich g-CxN4 supported PdAg nanowires as an efficient Mott-Schottky catalyst boosting photocatalytic dehydrogenation of formic acid

• 作者: Hu Liu Xue-Xiang Li Xin-Yang Liu Zhen-Hui Ma Zhou-Yang Yin Wei-Wei Yang Yong-Sheng Yu
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 808-816
• 页数: 9页
• 语种: 英文

摘要

Developing an efficient photocatalyst,catalyzing formic acid (FA) dehydrogenation,can satisfy the demand of the H2 energy.Herein,a graphitic carbon nitride (g-CxN4)-based nanosheet (x =3.2,3.6 or 3.8) with melem rings conjugated by Schiff-base bond (N=C-C=N) was synthesized,tuning the bandgaps (Eg) of graphitic carbon nitride (g-C3N4) in the range of 1.8 ＜ Eg ＜ 2.7 eV,and grown PdAg nanowires (NWs) on its surface forming an efficient PdAg NWs/g-CxN4 Mott-Schottky heterojunction for enhancing dehydrogenation photocatalysis of FA.The boosting photocatalysis benefits from the Schiff-base bond tuning the Eg of g-C3N4 and strongly coupling from the heterojunction.Among the heterojunction,the PdsAg5 NWs/g-C3.6N4 exhibits the best dehydrogenation photocatalysis of FA[turnover frequency (TOF)=1230 h-1]under visible light (λ ＞ 400 nm) without any additive at 25 ℃,which is the best value among ever-reported ones.This work provides a new strategy to boost dehydrogenation photocatalysis of FA,which will be promising for practical application of H2 in future energy field.