探索 PdO 和 Pd/CeO2 氧空位在碳酸氢盐氢化中的作用

IF 7.2 2区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY
Hyun-Wook Jeong , Gwang-Nam Yun , Youn-Sang Bae , Kyung-Ryul Oh , Young Kyu Hwang
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引用次数: 0

摘要

使用钯基催化剂氢化水溶液中的碳酸氢盐是生产甲酸酯的有效方法。在此,我们通过两步煅烧法合成了精细分散的 Pd/CeO2 催化剂,并评估了其在还原过程前后的催化活性。未还原的 Pd/CeO2 催化剂的碳酸氢盐加氢活性明显高于还原催化剂。虽然经过多次循环后活性有所下降,但通过煅烧再生,金属钯重新转化为高活性的氧化钯,从而有效地恢复了活性。此外,Pd 的加入和反应条件增加了 CeO2 中 Ce3 + 的含量和氧空位,从而提高了碳酸氢盐的吸附性和催化性能。这些发现强调了 PdO 和 CeO2 载体中的氧空位在 Pd/CeO2 碳酸氢盐加氢催化剂催化活性中的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring the role of PdO and oxygen vacancies of Pd/CeO2 in bicarbonate hydrogenation
The hydrogenation of bicarbonates in aqueous solutions using a Pd-based catalyst is an effective method for the production of formate. Herein, we synthesized finely dispersed Pd/CeO2 catalysts via a two-step calcination method and evaluated their catalytic activities before and after the reduction process. The unreduced Pd/CeO2 catalyst exhibited significantly higher activity for bicarbonate hydrogenation than the reduced catalyst. Although the activity declined after multiple cycles, regeneration via calcination effectively restored activity by converting metallic Pd back to highly active PdO. In addition, Pd incorporation and reaction conditions increased Ce3 + contents and oxygen vacancies in CeO2, enhancing bicarbonate adsorption and catalytic performance. These findings highlight the roles of PdO and oxygen vacancies in the CeO2 support in the catalytic activity of Pd/CeO2 catalysts for bicarbonate hydrogenation.
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来源期刊
Journal of CO2 Utilization
Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.90
自引率
10.40%
发文量
406
审稿时长
2.8 months
期刊介绍: The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.
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