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在TiO₂上的Cu活性位点的光诱导动态重组用于低温H₂从甲醇和水中生产

Shunqin Luo¹, Hui Song^1,2, Fumihiko Ichihara¹

¹International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.

Journal of the American Chemical Society

|September 7, 2023

概括

在二氧化 (TiO2) 催化剂上轻度激活铜,恢复低温甲醇蒸汽改造的活性. 这种策略通过使用光激发电荷载体将不活跃的氧化铜转化为活跃的金属铜来提高的生产.

科学领域:

不同质的催化
材料科学
光催化

背景情况:

催化剂活性部位结构决定了催化性能.
在反应条件下活跃地点的动态重组是不太了解的.
利用动态转换来提高催化剂的效果仍然是一个挑战.

研究的目的:

制定一个光激活策略来调节催化剂动态重组.
在甲醇蒸汽改革中增强TiO2支持的Cu催化剂的催化功能.
使用光线对Cu活性部位进行实地操纵.

主要方法:

用TiO2支持的Cu催化剂的制造.
在照明下低温甲醇蒸汽改造.
使用现场技术对催化剂结构和活性位点进行表征.

主要成果:

光照引发的结构恢复失活的Cu2O到活跃的金属Cu.
从TiO2的光激发电荷载体负责结构的恢复.
在低强度太阳辐射下,优化的Cu/TiO2催化剂实现了1724.1μmol g−1 min−1的H2生产率.

结论:

简单的光激活策略有效地调节了Cu活性站点的动态重组.
该方法显著提高了甲醇蒸汽改制的催化活性和稳定性.
通过光-物质-反应物相互作用在现场操纵催化剂,提供实时功能化可能性.

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