Abnormal inhibiting effect of H2O on Pd/SiO2 and Na–Pd/SiO2 catalysts for HCHO oxidation

文献信息

发布日期 2023-09-21
DOI 10.1039/D3CY00796K
影响因子 6.119
作者

Xiaofeng Liu, Changbin Zhang, Yuming Zheng


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摘要

Active hydroxyl groups (OH) are very important in HCHO oxidation, due to the fact that OH is the main active species in the degradation of formate and dioxymethylene (DOM) groups, especially for noble metal supported catalysts with alkali metal addition. Interestingly, in this study we found that sodium (Na) can also promote HCHO oxidation activity of Pd/SiO2 catalysts without activated surface OH. Though Na addition could effectively improve the dispersion of Pd and the oxygen activation capacity of the catalyst, no effect on H2O activation to form surface OH was found. Notably, different from Pd/TiO2 or Pt/TiO2 catalysts with TiO2 as support, H2O caused the deactivation of Pd/SiO2 and even Na–Pd/SiO2 catalysts. Investigation of the catalysts showed that the aggregation of Pd particles, reduction of effective interface and accumulation of intermediate products were the main factors leading to the deactivation of the catalysts. However, the addition of Na could improve the regeneration ability of the Pd/SiO2 catalyst.

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来源期刊

Catalysis Science & Technology

Catalysis Science & Technology
CiteScore: 5.91
自引率: 4.5%
年发文量: 600

Catalysis Science & Technology is committed to publishing research reporting high-quality, cutting-edge developments across the catalysis community at large. The journal places equal focus on publications from the heterogeneous, homogeneous, thermo-, electro-, photo-, organo- and biocatalysis communities. Works published in the journal feature a balanced mix of fundamental, technology-oriented, experimental, computational, digital and data-driven original research, thus appealing to catalysis practitioners in both academic and industrial environments. Original research articles published in the journal must demonstrate new catalytic discoveries and/or methodological advances that represent a significant advance on previously published work, from the molecular to the process scales. We welcome rigorous research in a wide range of timely or emerging applications related to the environment, health, energy and materials. Catalysis Science & Technology publishes Communications, Articles, Reviews and Perspectives. More details regarding manuscript types may be found in the Information for Authors section.

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