{"id":670409,"date":"2025-05-20T22:30:33","date_gmt":"2025-05-20T19:30:33","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/cobalt-catalyst-rivals-platinum-in-key-industrial-reaction\/"},"modified":"2025-05-20T22:30:33","modified_gmt":"2025-05-20T19:30:33","slug":"cobalt-catalyst-rivals-platinum-in-key-industrial-reaction","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/cobalt-catalyst-rivals-platinum-in-key-industrial-reaction\/","title":{"rendered":"Cobalt catalyst rivals platinum in key industrial reaction"},"content":{"rendered":"
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\n Characterization of isolated Co in CoS-1. Credit: Nature Catalysis<\/i> (2025). DOI: 10.1038\/s41929-025-01320-x
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Propane dehydrogenation is a key industrial route to producing propylene without relying on oil. However, its current production processes rely heavily on precious-metal catalysts such as Pt-based materials. Developing efficient alternatives using Earth-abundant metals has remained a challenge.<\/p>\n

In a study published<\/a> in Nature Catalysis<\/i>, Prof. Xiao Jianping’s group from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Science<\/a>s, and collaborators, have developed a high-performance cobaltosilicate zeolite catalyst (CoS-1) via a hydrothermal synthesis method.<\/p>\n

The catalyst has solely tetrahedral cobalt sites and none of the unstable cobalt species, achieving a propylene productivity as high as 9.7 kgC3<\/sub>= kgcat<\/sub>\u20131<\/sup> h\u20131<\/sup>, surpassing that of an industrial PtSn\/Al2<\/sub>O3<\/sub> catalyst.<\/p>\n

The synthesis method involved a gel composed of cobalt salts, tetraethyl orthosilicate, tetrapropylammonium hydroxide (TPAOH), urea, and water, followed by crystallization at 180\u00b0C. After calcination to remove the organic template and trip<\/a>le nitric acid washing at 80\u00b0C to eliminate excess cobalt species, the resulting CoS-1 catalyst contained only tetrahedral cobalt sites without unstable Co species.<\/p>\n

Through density functional theory calculations and ab initio molecular dynamics simulations, researchers studied the stability of different active centers, and uncovered the mechanism behind the high performance of the CoS-1 catalyst.<\/p>\n

They revealed that the flexible zeolite framework obviously lowered the dehydrogenation barriers at isolated cobalt sites due to entropic effects, resulting in a lower barrier of propane dehydrogenation than a Pt3<\/sub>Sn alloy.<\/p>\n

Microkinetic simulations further showed that while CoS-1 had a lower dehydrogenation barrier, its overall reaction rate at initial conversions was slightly lower than that of Pt3<\/sub>Sn, due to reduced propane concentration at isolated Co sites\u2014an effect of entropy loss during diffusion into the zeolite channels.<\/p>\n

The CoS-1 developed in this study exhibits excellent long-time stability. Researchers have proven that this can be attributed to the non-bonding adsorption of propylene within the zeolite, which enables rapid product desorption and reduces coke formation.<\/p>\n

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More information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\tHang Zhou et al, Cobaltosilicate zeolite beyond platinum catalysts for propane dehydrogenation, Nature Catalysis<\/i> (2025). DOI: 10.1038\/s41929-025-01320-x<\/a><\/p>\n<\/p><\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tChinese Academy of Sciences
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<\/p><\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>:
\n\t\t\t\t\t\t\t\t\t\t\t\tCobalt catalyst rivals platinum in key industrial reaction (2025, May 20)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 20 May 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news<\/a>\/2025-05-cobalt-catalyst-rivals-platinum-key.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

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