期刊
MATERIALS HORIZONS
卷 8, 期 10, 页码 2842-2850出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1mh00869b
关键词
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资金
- National Key Research and Development Program of China [2020YFA0710301]
- National Natural Science Foundation of China [U1832145, 51972195, 21832005, 21972078, 11374190]
- Young Scholars Program of Shandong University [2016WLJH16, 2020QNQT012]
- Shandong Province Natural Science Foundation [ZR2020YQ16]
- Taishan Scholar Foundation of Shandong Province, China
A zirconium-based metal-organic framework containing boron (UiO-66-B) was prepared as an efficient photocatalyst for H2O2 production. The role of boron in enhancing H2O2 generation efficiency was highlighted through theoretical calculations and experimental results, providing a new strategy for designing photocatalysts with excellent H2O2 evolution efficiency.
A zirconium-based metal-organic framework containing boron (UiO-66-B) is prepared, which displays efficient photocatalytic H2O2 production. The H2O2 evolution rate is about 1002 mu mol g(-1) h(-1), much higher than that of most known photocatalysts. Pristine UiO-66 displays a much lower activity (314 mu mol g(-1) h(-1)) under the same conditions, suggesting the significant role of boron. Both theoretical calculations and the combined experimental results verify the above conclusion, and the role of boron is ascribed to the following aspects: (1) enhanced O-2 adsorption, (2) highly selective proton-coupled two-electron transfer, (3) faster carrier separation and surface charge transfer, and (4) faster generation but slower decomposition rates of H2O2. This work highlights key factors in the two-electron O-2 reduction reaction (ORR), presents a deeper understanding of the role of boron in enhancing H2O2 production, and provides a new strategy for designing photocatalysts with excellent H2O2 evolution efficiency.
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