高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (9): 20220349.doi: 10.7503/cjcu20220349

• 研究论文 • 上一篇    下一篇

Ga-C3N4单原子催化剂高效光驱动CO2环加成

杨静怡1, 施思齐1, 彭怀涛2, 杨其浩2(), 陈亮2()   

  1. 1.上海大学材料科学与工程学院, 上海 200444
    2.中国科学院宁波材料技术与工程研究所, 宁波 315201
  • 收稿日期:2022-05-17 出版日期:2022-09-10 发布日期:2022-07-18
  • 通讯作者: 杨其浩,陈亮 E-mail:yangqihao@nimte.ac.cn;chenliang@nimte.ac.cn
  • 基金资助:
    浙江省自然科学基金(LQ22B010005);宁波市自然科学基金(2021J202)

Integration of Atomically Dispersed Ga Sites with C3N4 Nanosheets for Efficient Photo-driven CO2 Cycloaddition

YANG Jingyi1, SHI Siqi1, PENG Huaitao2, YANG Qihao2(), CHEN Liang2()   

  1. 1.School of Material Science and Engineering,Shanghai University,Shanghai 200444,China
    2.Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China
  • Received:2022-05-17 Online:2022-09-10 Published:2022-07-18
  • Contact: YANG Qihao,CHEN Liang E-mail:yangqihao@nimte.ac.cn;chenliang@nimte.ac.cn
  • Supported by:
    the Zhejiang Provincial Natural Science Foundation, China(LQ22B010005);the Ningbo Natural Science Foundation, China(2021J202)

摘要:

通过配位锚定策略制备了一种高Ga单原子负载量(质量分数8.42%)的C3N4纳米片(Ga-C3N4), 用于高效光驱动CO2环加成反应. 研究结果表明, Ga-C3N4中Ga单原子和均匀分布的N位点可分别作为Lewis酸/碱位点来活化环氧化合物和CO2. 此外, Ga-C3N4具有优异的半导体特性, 在光照下产生的光生电子可以显著加快环氧化合物的开环速率, 即提升决速步骤的反应效率. 通过多功能协同, Ga-C3N4在光照下实现了CO2到环状碳酸酯的高效催化转化.

关键词: 单原子催化, 光驱动, CO2环加成

Abstract:

A carbon nitride(C3N4)-based catalyst featuring high density of atomically dispersed Ga species(mass fraction of 8.42%) was rationally fabricated(Ga-C3N4) based on a molecule-confined strategy for photo-driven cycloaddition of CO2 and epoxides. The atomically dispersed Ga sites and uniform N species in Ga-C3N4 served as Lewis acid and Lewis base sites, respectively, cooperating together to promote the activation of substrates. Compared with the thermal-driven catalytic system, the light irradiation favors the photo-generated electron transfer from catalyst(i.e., Ga-C3N4) to epoxides, facilitating the catalytic efficiency of ring-opening step(i.e., rate-limiting step). As a result, Ga-C3N4 exhibited superior catalytic performance towards the CO2 cycloaddition with epoxides under light irradiation.

Key words: Single atom catalysis, Photo-driven, CO2 cycloaddition

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