化工学报 ›› 2020, Vol. 71 ›› Issue (10): 4327-4349.DOI: 10.11949/0438-1157.20200693

• 综述与专论 • 上一篇    下一篇

光电解水产活性氢/氧耦合加氢/氧化过程用水滑石基纳米材料

来天艺(),王纪康,李天,白莎,郝晓杰,赵宇飞(),段雪   

  1. 北京化工大学化工资源有效利用国家重点实验室,北京 100029
  • 收稿日期:2020-06-02 修回日期:2020-07-17 出版日期:2020-10-05 发布日期:2020-10-05
  • 通讯作者: 赵宇飞
  • 作者简介:来天艺 (1996—),女,硕士研究生,laitianyi1996@126.com
  • 基金资助:
    国家自然科学基金项目(21922801)

Photoelectrochemical water splitting into active hydrogen/oxygen species coupling with hydrogenation/oxidation process using layered double hydroxides-based nanocatalysts

Tianyi LAI(),Jikang WANG,Tian LI,Sha BAI,Xiaojie HAO,Yufei ZHAO(),Xue DUAN   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2020-06-02 Revised:2020-07-17 Online:2020-10-05 Published:2020-10-05
  • Contact: Yufei ZHAO

摘要:

加氢/氧化催化是现代化学工业中最广泛的催化过程,传统加氢/氧化催化需要高温高压、消耗大量氢气/氧气(或双氧水等),且存在高成本、高能耗、低选择性等问题。因此,如何在温和条件下绿色高效地实现加氢还原/氧化反应,是目前催化领域的研究热点和难点之一。光电催化过程因其能量来源广泛、清洁环保,且结合了光催化和电催化的优势,已成为当前研究热点,而光电分解水产生H2/O2过程涉及高反应活性的中间物种(活性氢*H、活性氧*O)的产生。利用光电解水产生的中间*H/*O物种,并使其直接参与加氢/氧化催化过程,实现一步光电解水制活性氢/氧耦合加氢/氧化过程,有望极大提高反应的效率。通过对催化剂结构进行调控,使得耦合过程可在温和的反应条件下进行,同时可避免因使用氢气/氧气等导致的安全和耗能等问题。本文综述了光电分解水过程,传统化工的加氢/氧化过程以及光电分解水与加氢/氧化耦合反应等方面的发展,介绍了水滑石基纳米材料在光电解水耦合加氢/氧化过程中的结构和性能优势,并对未来研究方向进行了展望,以期为高附加值有机化学品的高选择性低成本制备提供思路。

关键词: 催化剂, 光化学, 电化学, 加氢/氧化过程, 水滑石

Abstract:

Hydrogenation/oxidation processes are regarded as the most widely used catalytic reactions in modern chemical development. However, the traditional reaction process always requires harsh reaction conditions (such as high temperature, high pressure, a lot of hydrogen/oxygen consumption, etc), the high cost, overconsumption of energy and low selectivity is always limiting its further development. Therefore, conducting the hydrogenation/oxidation reaction efficiently under mild conditions is one of the greatest challenges in this field. Photoelectrocatalysis has been widely studied due to its wide, clean and sustainable energy sources, which combines the advantages of both photocatalysis and electrocatalysis. Moreover, the process of generating H2/O2 by photoelectrocatalytic water splitting involves the production of highly reactive intermediate species (active hydrogen *H and active oxygen *O) which can be used by directly coupling the hydrogenation/oxidation catalytic processes, and the efficiency of coupled reaction will be greatly improved. The review here summarizes the research progress of photoelectrocatalysis from three aspects: active species of intermediate products produced by photoelectrochemical water splitting, hydrogenation/oxidation reaction of the traditional chemical industry, and coupling photoelectrochemical water splitting with hydrogenation/oxidation process using layered double hydroxides (LDHs)-based nanomaterials. It is expected to provide ideas for the high selectivity and low cost preparation of high value-added organic chemicals.

Key words: catalyst, photochemistry, electrochemistry, hydrogenation/oxidation processes, layered double hydroxides

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