Electron promoted palladium-cobalt active sites for efficient catalytic combustion of methane

Lin, Jing‐Jenn; Xu, Yalan; Chen, Xiaohua; Huang, Jiangli; Xu, Haowei; Zheng, Ying

doi:10.1016/j.jclepro.2022.135744

Cited by 14 publications

(2 citation statements)

References 53 publications

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“…The details are presented in the Supporting Material (Text S3). For the calculation of the reaction rate ( r H 2 S ) and apparent activation energy ( E a ), the light-off tests over catalysts were performed at a relatively high WHSV (92,300 mL·g –1 ·h –1 ) with a conversion rate below 15% (Figure S2) to eliminate external/internal diffusion …”

Section: Methodsmentioning

confidence: 99%

Ce–Mn Oxide Nanocomposites for Catalytic Removal of H₂S

Zhang

Zheng

Zhang

et al. 2023

ACS Appl. Nano Mater.

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The development of efficient and stable nanocatalysts is crucial for the catalytic removal of H 2 S through selective oxidation to sulfur. Inspired by the different catalytic activity and selectivity of CeO 2 and MnO 2 for the reaction, cerium−manganese (Ce−Mn) nanocomposite oxides with tunable phase structure and unique surface properties were constructed to optimize the catalytic performance. By regulating the molar ratio of Ce and Mn components, a novel catalyst structure comprising Ce−Mn solid solution and amorphous CeO 2 is synthesized from Ce−Mn oxide with n Ce /n Mn ratio of 0.5 (50Ce−Mn). Compared with the unmodified MnO 2 , the tailored 50Ce−Mn possesses a high specific surface area, which facilitates the access of reactants to active sites and the desorption of formed sulfur. More importantly, strong Ce−Mn interaction and abundant surface-active oxygen species are generated, contributing to the regeneration of Mn 4+ /Ce 4+ active sites, facilitating the formation of sulfur, and inhibiting the accumulation of sulfates during the reaction. Consequently, 50Ce−Mn presents a superior catalytic activity (T 100 of 150 °C), stability, and sulfur selectivity even under relatively high weight hourly space velocity conditions (23,000 mL•g −1 •h −1 ). This study provides an example of how catalytic performance can be boosted through phase structure regulation on nanocomposites.

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Section: Methodsmentioning

confidence: 99%

Ce–Mn Oxide Nanocomposites for Catalytic Removal of H₂S

Zhang

Zheng

Zhang

et al. 2023

ACS Appl. Nano Mater.

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“…Zheng's group synthesized a series of alumina with different dopants of various electron affinity to support the Pd catalyst. 142,143 Similar to the anchor effect of the surface pentacoordinate Al 3+ sites, the dopants (Y, Mg, Zn, Ni, and Sn et al) can also promote the stability of active Pd atoms, which leads to smaller and higher dispersed Pd nanoparticles. Moreover, the electronic MSIs between active metals and alumian can also be affected by the dopants, in which the MSIs strength is related to the electronegativity of the dopants.…”

Section: The Metal-support Interactionsmentioning

confidence: 99%