Designing neighboring-site activation of single atom via tunnel ions for boosting acidic oxygen evolution

Yixin Hao, Sung-Fu Hung, Luqi Wang, Liming Deng, Wen-Jing Zeng, Chenchen Zhang, Zih-Yi Lin, Chun-Han Kuo, Ye Wang, Ying Zhang, Han-Yi Chen, Feng Hu, Linlin Li and Shengjie Peng ()
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Yixin Hao: Nanjing University of Aeronautics and Astronautics
Sung-Fu Hung: National Yang Ming Chiao Tung University
Luqi Wang: Nanjing University of Aeronautics and Astronautics
Liming Deng: Nanjing University of Aeronautics and Astronautics
Wen-Jing Zeng: National Yang Ming Chiao Tung University
Chenchen Zhang: Jiangnan University
Zih-Yi Lin: National Yang Ming Chiao Tung University
Chun-Han Kuo: National Tsing Hua University
Ye Wang: Nanjing University of Aeronautics and Astronautics
Ying Zhang: Jiangnan University
Han-Yi Chen: National Tsing Hua University
Feng Hu: Nanjing University of Aeronautics and Astronautics
Linlin Li: Nanjing University of Aeronautics and Astronautics
Shengjie Peng: Nanjing University of Aeronautics and Astronautics

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Realizing an efficient turnover frequency in the acidic oxygen evolution reaction by modifying the reaction configuration is crucial in designing high-performance single-atom catalysts. Here, we report a “single atom–double site” concept, which involves an activatable inert manganese atom redox chemistry in a single-atom Ru-Mn dual-site platform with tunnel Ni ions as the trigger. In contrast to conventional single-atom catalysts, the proposed configuration allows direct intramolecular oxygen coupling driven by the Ni ions intercalation effect, bypassing the secondary deprotonation step instead of the kinetically sluggish adsorbate evolution mechanism. The strong bonding of Ni ions activates the inert manganese terminal groups and inhibits the cross-site disproportionation process inherent in the Mn scaffolding, which is crucial to ensure the dual-site platform. As a result, the single-atom Ru-Ni-Mn octahedral molecular sieves catalyst delivers a low overpotential, adequate mass activity and good stability.

Date: 2024
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DOI: 10.1038/s41467-024-52410-6

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