Photocatalytic and photoelectrochemical production of hydrogen peroxide under acidic conditions in organic p-n bilayer/bismuth vanadate system
Photocatalytic and photoelectrochemical production of hydrogen peroxide under acidic conditions in organic p-n bilayer/bismuth vanadate system
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DOI：
10.20964/2022.11.41
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发表时间：
2022-11
影响因子：
1.5
通讯作者：
Kosuke Ikezoi
中科院分区：
文献类型：
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作者：
Kosuke Ikezoi
由于过氧化氢（H2 O2）在各个行业中用作氧化剂，因此需要开发一种新型、清洁且节能的H2 O2生产工艺，作为当前制造方法的替代品（即，蒽醌法）。在本研究中，H2 O2（即，在酸性介质中研究了水和氧气的光催化H2 O2形成）。在本文中，混合价钴（II，III）-氧化物负载的钒酸铋和Au-负载的有机p-n双层的酞菁锌（p型）和富勒烯（n型）分别作为氧化和还原位点。此外，还定量地证实了该体系中H2 O2的光催化生成.此外，在光电化学条件下，在氧化和还原位点之间施加偏压，研究了H2 O2的形成。由于系统中H2 O2的生成速率受到限制，因此H2 O2的最大光能转换效率估计为< 0.01%。因此，未来的研究重点应放在开发一个有效的还原位点，以提高光能转换效率。
Because hydrogen peroxide (H 2 O 2 ) is utilized as an oxidant in various industries, it is desirable to develop a novel, clean, and energy-saving process for H 2 O 2 production as an alternative to the current manufacturing method (i.e., the anthraquinone method). In this study, the artificial photosynthesis of H 2 O 2 (i.e., photocatalytic H 2 O 2 formation) from water and oxygen was investigated in an acidic medium. Herein, a mixed-valence cobalt(II,III)-oxide-loaded bismuth vanadate and an Au-loaded organic p-n bilayer of zinc phthalocyanine (p-type) and fullerene (n-type) were employed as the oxidation and reduction sites, respectively. Further, the photocatalytic formation of H 2 O 2 in this system was quantitatively confirmed. Furthermore, H 2 O 2 formation was investigated under photoelectrochemical conditions, where a bias voltage was applied between the oxidation and reduction sites. The maximum photoenergy conversion efficiency for the H 2 O 2 production was estimated to be < 0.01% owing to the rate-limiting H 2 O 2 formation that occurred in the system. Therefore, future research should focus on developing an efficient reduction site to improve the photoenergy conversion efficiency.