基于甲基硫的共价有机框架的分子工程,用于逆反应抑制光催化总体水分裂
Xiang Zhang1,2,3, Zhiwei Xiao1,3, Lei Jiao1,3
1CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China.
Angewandte Chemie (International ed. in English)
|June 26, 2024
概括
使用甲基化的分子工程显著抑制了光催化剂的逆向氧降解反应. 这一突破使得太阳能可通过整体水分进行高效的太阳能燃料生产.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 可再生能源可再生能源是可再生能源.
背景情况:
- 太阳能通过光催化整体水分 (OWS) 转化为对于可持续燃料至关重要.
- 反向氧降解反应 (ORR) 阻碍了OWS的效率,原因是受益于质子合电子转移 (PCET).
研究的目的:
- 通过甲基化研究分子工程,以抑制光催化剂中的反向ORR.
- 为了提高整体水分性能,以便有效地将太阳能转化为燃料.
主要方法:
- 使用基于硫的共价有机框架 (COF) 光催化剂.
- 在O2吸附点引入精确甲基化,以修改电子特性和反应途径.
主要成果:
- 甲基化有效地阻断了电子转移,并增加了中间溶解障碍,阻碍了ORR的PCET.
- 甲基化驱逐电子以促进前进的H2进化,实现~70%的逆向ORR的抑制.
- 修改后的DS-COF显示了OWS性能的三倍增强,达到124.7 μmol h-1 g-1 H2演化率.
结论:
- 通过甲基化进行分子工程是一种可行的策略,可以抑制光催化剂中的反向ORR.
- 这种方法显著提高了太阳能转化为的效率,为先进的光催化剂设计提供了途径.
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