Bi/UiO-66-derived electrocatalysts for high CO2-to-formate conversion rate
Bi/UiO-66-derived electrocatalysts for high CO2-to-formate conversion rate
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Bi/UiO-66 衍生的电催化剂可实现高 CO2 转化为甲酸盐的转化率
DOI：
10.1016/j.apcatb.2023.122400
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Tatsumi Ishihara
中科院分区：
文献类型：
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作者：
Yuta Takaoka;Jun Tae Song;Atsushi Takagaki;Motonori Watanabe;Tatsumi Ishihara
在二氧化碳电催化还原反应(CO2RR)技术中，高效利用二氧化碳资源对二氧化碳的转化率要求很高。在这项研究中，我们提出了将UIO-66金属有机骨架(MOF)结构与铋电催化剂相结合的策略，用于高活性的CO2RR选择性甲酸生产。合成的Bi/UIO-66催化剂具有良好的CO2还原性能，尽管其电化学比表面积较小，但在−0.7V下的电流密度是未加UIO-66的裸铋的4.6倍。此外，与没有NH2的相比，NH2功能化的UiO-66对CO2RR几乎没有影响，这可能是由于在CO2RR过程中解体造成的。傅立叶变换红外光谱(FTIR)、拉曼光谱、X-射线光电子能谱(XPS)等表征结果表明，碳酸盐物种以碳酸盐形式捕获的CO2在Zr-MOF位具有较高的CO2转化率。我们的研究结果表明，作为载体材料实现高效的二氧化碳还原是可行的。
In the CO2electrocatalytic reduction reaction (CO2RR) technology, high CO2conversion rate is highly required for efficient CO2utilization from the CO2resource. In this study, we propose the strategy of combining UiO-66 metal organic framework (MOF) structure with Bi electrocatalyst for highly active CO2RR with selective formic acid production. The synthesized Bi/UiO-66 catalyst shows superior CO2reduction property, 4.6 times higher current density at −0.7 V vs. reversible hydrogen electrode (RHE) than bare Bi without UiO-66 despite of low electrochemical surface area. Also, NH2functionalized UiO-66 shows almost no effect on CO2RR as compared to without NH2probably due to disassembled linkers during CO2RR. Various characterizations such as Fourier transform infrared (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) indicate carbonate species captured form of CO2at Zr-MOF site should contribute the high CO2conversion rate. Our findings demonstrate the feasibility of Zr-MOF as a Supporting material to achieve efficient CO2reduction.