Plate Nº 16 · recorded October 10, 2026
Chemistry & MaterialsReported finding
A hidden nickel-oxygen structure unlocks cheaper methane conversion
A catalyst with just 0.8% nickel matched one with 8% — because a dynamic atomic motif, not metallic nickel, drives methane-to-syngas conversion at lower cost.
By Nathan Brooks3 min read655 words
In brief
- A 0.8 wt% Ni catalyst converted 92% of methane, matching an 8.0 wt% Ni catalyst with ten times more metal
- Published September 9, 2026 in Nature Catalysis, led by DICP researchers Tao Zhang, Aiqin Wang and Xiaoyan Liu
- The reconstructed [Ni1O4Ni4] motif lowered the C–H activation barrier to 12.5 kcal/mol, versus 38.5 kcal/mol on intact NiO(100) and 15.7 kcal/mol on metallic Ni(111)
- CO and H2 selectivity reached 87.0%, with a stable H2/CO molar ratio of about 2.0
A catalyst carrying just 0.8% nickel by weight converted 92% of methane into syngas, matching the performance of a conventional catalyst loaded with eight percent nickel. The result, published September 9, 2026 in Nature Catalysis, points to a previously hidden atomic structure rather than metallic nickel as the true driver of one of industry's most-used reactions.
What did the scientists actually discover?
For decades, chemists studying partial oxidation of methane (POM) assumed that tiny nickel metal particles drove the reaction. POM turns methane into syngas, a hydrogen–carbon monoxide mixture used to make fuels and chemicals.
The new study challenges that view. Researchers found that almost no metallic nickel remained in the working catalyst. Yet the catalyst still worked. Instead of metal, the team identified a reconstructed atomic motif called [Ni1O4Ni4] that forms in situ on the nickel oxide surface during the reaction itself. No one had documented this motif in POM before.
How did the team test the low-nickel catalyst?
The team, led by Profs. Tao Zhang, Aiqin Wang and Xiaoyan Liu at the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences, prepared a Ni/Al2O3 catalyst containing only 0.8 wt% nickel via a microemulsion method.
Under POM conditions the catalyst:
- Converted 92% of methane
- Produced CO and H2 with 87.0% selectivity
- Held the H2/CO molar ratio steady at about 2.0
This matched an 8.0 wt% Ni/Al2O3 catalyst made by standard impregnation, even though the new material carried one tenth as much nickel.
Why does the loading matter?
The new catalyst also beat another 0.8 wt% Ni/Al2O3 sample made by impregnation. The second material did not perform POM and only burned methane. The difference lay in how each sample was made, not in how much nickel it carried.
The team also saw that any metallic nickel present at the start oxidized to nickel oxide under POM conditions. Pure nickel oxide, however, showed no POM activity. It only fully oxidized methane.
What is the true active site?
Using in situ characterization, the researchers caught the [Ni1O4Ni4] unit forming on the NiO(100) surface during the reaction. Density functional theory (DFT) calculations — a method that models how electrons behave in materials — showed this reconstructed motif makes breaking the strong C–H bond in methane much easier.
The calculated activation barriers:
- 12.5 kcal·mol⁻¹ on the reconstructed motif
- 38.5 kcal/mol on intact NiO(100)
- 15.7 kcal/mol on metallic Ni(111)
The reconstructed structure therefore offers a kinetic advantage over both the parent oxide and the metal chemists long blamed for the activity.
What does this change for catalyst design?
Prof. Wei Liu, a co-lead on the study, said the work shows why observing catalysts during real reactions matters. "Our study highlights the critical role of in situ characterization in identifying dynamic active structures under reaction conditions," Liu said. "Dynamic reconstruction enables low-loading catalysts to achieve high performance, offering new opportunities for the rational design of efficient catalysts while reducing reliance on high metal loadings."
The implication is practical. Industrial POM catalysts could deliver the same syngas output using a fraction of the nickel they now consume, lowering both cost and supply pressure on a metal classed as a strategic resource.
What are the limits of the work?
The findings cover one reaction system and one family of nickel-on-alumina catalysts. The study did not test long-term stability under industrial conditions or compare the new material against every commercial formulation.
Still, the result gives chemists a concrete atomic target — the [Ni1O4Ni4] motif — to design around rather than a vague assumption about metal nanoparticles.
Other authors include Prof. Tao Yang of Xi'an Jiaotong University and Prof. Graham J. Hutchings of Cardiff University. The paper appeared in Nature Catalysis, 2026, volume 9, issue 8, page 848 (DOI: 10.1038/s41929-026-01580-1).
via dx.doi.org (Original)
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