Shielding Pt/γ-Mo2N by inert nano-overlays enables stable H2 production

Zirui Gao, Aowen Li, Xingwu Liu, Mi Peng, Shixiang Yu, Maolin Wang, Yuzhen Ge, Chengyu Li, Tie Wang, Zhaohua Wang, Wu Zhou () and Ding Ma ()
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Zirui Gao: Peking University
Aowen Li: University of Chinese Academy of Sciences
Xingwu Liu: Peking University
Mi Peng: Peking University
Shixiang Yu: Peking University
Maolin Wang: Peking University
Yuzhen Ge: Peking University
Chengyu Li: Peking University
Tie Wang: Peking University
Zhaohua Wang: Peking University
Wu Zhou: University of Chinese Academy of Sciences
Ding Ma: Peking University

Nature, 2025, vol. 638, issue 8051, 690-696

Abstract: Abstract The use of reactive supports to disperse metal species is crucial for constructing highly efficient interfacial catalysts, by tuning the competitive reactant adsorption–activation pattern in supported metal catalysts into a non-competitive mechanism1–3. However, these reactive supports are prone to deterioration during catalysis, limiting the lifespan of the catalyst and their potential practical applications4. New strategies are needed to simultaneously protect reactive supports and surface metal species without compromising the inherent catalytic performance. Here we report a new strategy to augment the structural stability of highly active interfacial catalysts by using inert nano-overlays to partially shield and partition the surface of the reactive support. Specifically, we demonstrate that atomically dispersed inert oxide nano-overlays on a highly active Pt/γ-Mo2N catalyst can block the redundant surface sites of γ-Mo2N responsible for surface oxidation of this reactive support and the resulting deactivation. This strategy yields an efficient and highly durable catalyst for hydrogen production by methanol-reforming reaction with a mere 0.26 wt% Pt loading, exhibiting a record-high turnover number, to our knowledge, of 15,300,000 and a notable apparent turnover frequency of $$\mathrm{24,500}\,{\text{mol}}_{{{\rm{H}}}_{2}}\,{\text{mol}}_{{\rm{metal}}}^{-1}\,{\text{h}}^{-1}$$ 24,500 mol H 2 mol metal − 1 h − 1 . This innovative approach showcases the prospects of reducing noble metal consumption and boosting longevity, which could be applied to design effective and stable heterogeneous catalysts.

Date: 2025
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DOI: 10.1038/s41586-024-08483-w

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