Development of a Highly Stable Ternary Alloy Catalyst for Dry Reforming of Methane

Dry reforming of methane is a promising chemical reaction that can utilize CO2 and natural gas to produce value-added feedstocks. However, this process’s commercialized implementation has been stalled due to the lack of excellent durable and reusable catalysts. Here, we report a pseudo-binary alloy...

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Veröffentlicht in:ACS catalysis 2023-03, Vol.13 (6), p.3541-3548
Hauptverfasser: Liu, Ke, Xing, Feilong, Xiao, Yiying, Yan, Ning, Shimizu, Ken-ichi, Furukawa, Shinya
Format: Artikel
Sprache:eng
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Zusammenfassung:Dry reforming of methane is a promising chemical reaction that can utilize CO2 and natural gas to produce value-added feedstocks. However, this process’s commercialized implementation has been stalled due to the lack of excellent durable and reusable catalysts. Here, we report a pseudo-binary alloy (Ni0.5Co0.5)3Ge/SiO2, which partially substitutes Ni with Co without altering the parent Ni3Ge phase. The combination of high-angle annular dark-field–scanning transmission electron microscopy–energy-dispersive system, X-ray diffraction, and X-ray absorption fine-structure analysis showed the formation of a pseudo-binary alloy structure. High catalytic activity with remarkable thermal stability is produced by alloying Ni with Co and Ge during continuous operation of 1000 h (mean catalyst life: τ = 1300 h) at 700 °C even below the equilibrium conversion. Detailed characterization and theoretical calculations revealed that doping Co to Ni3Ge optimally modified the C–H activation ability, which minimized coke formation for high stability.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.2c05488