Synthesis of “Quasi-Ce-MOF” Electrocatalysts for Enhanced Urea Oxidation Reaction Performance,ACS Sustainable Chemistry & Engineering

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Synthesis of “Quasi-Ce-MOF” Electrocatalysts for Enhanced Urea Oxidation Reaction Performance
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-05-13 , DOI: 10.1021/acssuschemeng.0c01800
Yan Cheng ₁ , Xiao Xiao ₁ , Xiaowen Guo ₁ , Hang Yao ₁ , Huan Pang ₁

Affiliation

Cerium-based metal–organic framework (Ce-MOF) materials are promising electrocatalysts, while the catalytic activity of Ce-MOFs is lacking due to their inherent disadvantages (poor conductivity), and further improvements are needed. Herein, we propose a method for synthesizing a “quasi-Ce-MOF” straw-bundle composite assembled from one-dimensional (1D) nanorods. This is a method in which the MOF is directly heat-treated with a nitrogen atmosphere, and controlled partial pyrolysis results in the formation of a “quasi-MOF”. It is worth noting that the “quasi-MOF” material (Ce-MOF-350) calcined at 350 °C maintains the porous structure of the precursor while having more exposed active centers. Therefore, the catalytic activity of Ce-MOF-350 for the urea oxidation reaction (UOR) is greatly improved. This material also has good long-term stability because the 1D nanorods are closely connected. Through the reasonable calcination of Ce-MOF materials, this study provides a new strategy for improving the activity of electrocatalysts and developing high-efficiency electrocatalysts.

中文翻译：

合成“拟Ce-MOF”电催化剂增强尿素氧化反应性能

铈基金属有机框架（Ce-MOF）材料是有前途的电催化剂，而Ce-MOFs的固有缺点（导电性差）却缺乏催化活性，因此需要进一步改进。在这里，我们提出了一种从一维（1D）纳米棒组装的“准Ce-MOF”秸秆束复合材料的合成方法。该方法是在氮气氛下直接对MOF进行热处理，并且受控的部分热解导致形成“准MOF”。值得注意的是，在350°C下煅烧的“准MOF”材料（Ce-MOF-350）保持了前体的多孔结构，同时具有更多暴露的活性中心。因此，大大提高了Ce-MOF-350对尿素氧化反应（UOR）的催化活性。这种材料还具有良好的长期稳定性，因为一维纳米棒紧密相连。通过对Ce-MOF材料的合理煅烧，本研究为提高电催化剂的活性和开发高效电催化剂提供了新的策略。

更新日期：2020-05-13

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