用纳米氧化铈促进纳米铋片上的二氧化碳电还原。

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Chemistry - An Asian Journal Pub Date : 2024-06-18 DOI:10.1002/asia.202400296

Yue Guan, Siqian Wu, Huizi Huang, Zhejiaji Zhu, Wenjing Tian, Anxiang Yin

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引用次数: 0

摘要

甲酸（HCOOH）是电化学二氧化碳还原反应（CO2RR）的高能效产物。铋基催化剂在将 CO2 转化为甲酸的过程中显示出良好的前景，但仍亟需进一步提高其选择性和活性。在此，我们报告了由具有高 Ce3+/Ce4+ 比值和丰富氧空位的氧化铈纳米颗粒（CeOx）装饰的 Bi 纳米片的制备方法。CeOx 纳米粒子影响了铋的电子结构，增强了对 CO2 的吸附，从而促进了 Bi 纳米片的 CO2RR 特性。与元素铋纳米片相比，异质结构的 CeOx/Bi 纳米片在较宽的电位窗口内表现出更高的活性，与可逆氢电极相比，在 -0.9 V 电压下，电流密度为 16.1 mA cm-2，法拉第效率为 91.1%。

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Promotion of CO2 Electroreduction on Bismuth Nanosheets with Cerium Oxide nanoparticles.

Formic acid (HCOOH) is a highly energy-efficient product of electrochemical CO2 reduction reaction (CO2RR). Bismuth-based catalysts have shown promise in the conversion of CO2 to formic acid, but there is still a great need for further improvement in selectivity and activity. Herein, we report the preparation of Bi nanosheets decorated by cerium oxide nanoparticles (CeOx) with high Ce3+/Ce4+ ratio and rich oxygen vacancies. The CeOx nanoparticles affect on the electronic structures of bismuth, enhance the CO2 adsorption, and thus promote the CO2RR properties of Bi nanosheets. Compared with elemental Bi nanosheets, the hetero-structured CeOx/Bi nanosheets exhibit much higher activity over a wide potential window, showing a current density of 16.1 mA cm-2 with a Faradaic efficiency of 91.1% at -0.9 V vs. reversible hydrogen electrode.

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).