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Issue 29, 2020
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Two new Cu-based borate catalysts with cubic supramolecular cages for efficient catalytic hydrogen evolution

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Abstract

Focusing on renewable energy, we are devoted to developping efficient, robust and low cost water reduction catalysts (WRCs). Two new Cu-based borate catalysts, namely H2Na2K2[(μ4-O)Cu4@B20O32(OH)8]·21H2O (1) and H2Rb1.6K2.4[(μ4-O)Cu4@B20O32 (OH)8]·15H2O (2), with cubic supramolecular cages were synthesized under a hydrothermal condition. Moreover, new copper complexes were applied as water reduction catalysts (WRCs) in the presence of [Ir(ppy)2(dtbbpy)][PF6] as photosensitizer and triethanolamine (TEOA) as the sacrificial electron donor. Nevertheless, the main active place is attributed to the centre of Borates [(μ4-O)Cu4@B20O32(OH)8], and the atomic radius of the counter cation would be the critical factor of the photocatalytic activity. Increasing the atomic radius from the Na atom to the Rb atom, causes the photocatalytic activity to decrease efficiently. The experimental results match well with the density functional theory (DFT) conclusion. It is noteworthy to mention that our research not only enriches the Cu-based borate chemistry, but also investigates the photocatalytic activity of Cu-based borates. This would guide us through the borate synthesis and to develop their applications toward energy and the environment.

Graphical abstract: Two new Cu-based borate catalysts with cubic supramolecular cages for efficient catalytic hydrogen evolution

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Supplementary files

Article information


Submitted
04 Jun 2020
Accepted
25 Jun 2020
First published
30 Jun 2020

Dalton Trans., 2020,49, 10156-10161
Article type
Paper

Two new Cu-based borate catalysts with cubic supramolecular cages for efficient catalytic hydrogen evolution

W. Liu, Q. Qiu, M. Zhang, Z. Su, Q. An, H. Lv, Z. Jia and G. Yang, Dalton Trans., 2020, 49, 10156
DOI: 10.1039/D0DT01994A

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