光热治疗
甲醇
催化作用
水溶液
化学
制氢
化学工程
活化能
氢
热稳定性
异质结
光化学
相(物质)
纳米技术
材料科学
物理化学
有机化学
光电子学
工程类
作者
Baofang Zhang,Ziyu Zengcai,Wenting Lin,Meijin Zhang,Yunhong Pi,Zhihui Wang
标识
DOI:10.1016/j.cej.2023.142904
摘要
Photothermal synergism can effectively activate methanol at low operating temperature and significantly reduce the activation energy of the reaction, achieving more efficiently H2 release from methanol reforming. Here, a novel hierarchical heterojunction that integrating photo- and thermal-active Cu2O catalytic species with in-situ derived NH2[email protected]2 framework was specifically designed for photothermal-driven aqueous phase reforming of methanol into H2. The afforded Cu2O/NH2[email protected]2 realized an outstanding photothermal H2 production activity (apparent quantum efficiency of 22.3 % at 365 nm), ca. 13-times higher than that of thermocatalytic condition. Interestingly, the photothermal effect did confer the Cu2O/NH2[email protected]2 with unexpected activity at low temperature subsided to 100 °C and accelerated the activation of MeOH/H2O with an obvious reduction of activation energy from 82.62 kJ·mol−1 to 52.40 kJ·mol−1. The improvement of catalyst stability and the promotion of charge separation also contributed to a long-term photothermal H2 evolution activity with average rate of 1.49x106 μmolgCu-1h−1 and a total turnover number (TON) up to 5971 in 63 h, almost 125-fold promotion compared with Cu2O.
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