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Insight into calcination atmospheres of Ni/α-MoO3 nanosheets for aqueous phase reforming of biogas slurry: Simultaneous renewable hydrogen production and treatment

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  • Wang, Jian
  • Hu, Yongjie
  • Dong, Xiaoshan
  • Tao, Junyu
  • Yan, Beibei
  • Guo, Wei
  • Chen, Guanyi

Abstract

The effect of different nonreducing calcination atmosphere of Ni/α-MoO3 nanosheets on the aqueous phase reforming (APR) of biogas slurry (BS) was studied to investigate the role of strong metal–support interactions (SMSIs). Compared with the H2 yield obtained without a catalyst, the H2 yields of Ni/α-MoO3 nanosheets calcinated in CO2, air, and N2 increased from 1.37 to 5.82, 5.34, and 5.03 mLhydrogen/gcata./mLBS, respectively. The improved catalytic performance of Ni/α-MoO3 nanosheets is attributed to the combination of the acidic, basic, and redox-active metal sites, along with the oxygen vacancies. The difference between Ni/α-MoO3 nanosheets calcined in different atmospheres in terms of the APR of BS lies in the difference of their SMSI intensities, which follows the order of Ni/α-MoO3 nanosheets (CO2) > Ni/α-MoO3 nanosheets (Air) > Ni/α-MoO3 nanosheets (N2). Optimal removal efficiencies for nonpurgeable organic carbon (81.84 %), chemical oxygen demand (67.45 %), and ammonia nitrogen (12.90 %) are achieved on CO2-calcinated Ni/α-MoO3 nanosheets. Because the CO2-induced SMSI increases the amount of surface lattice oxygen and significantly decreases acidity, resulting in transition from surface hydrophobicity to surface hydrophilicity, thereby enhancing the catalytic activity. In addition, both the carbon-deposited aromatic polymers and the pollution from heavy metal oxides are ascribed to the deactivation of catalysts.

Suggested Citation

  • Wang, Jian & Hu, Yongjie & Dong, Xiaoshan & Tao, Junyu & Yan, Beibei & Guo, Wei & Chen, Guanyi, 2026. "Insight into calcination atmospheres of Ni/α-MoO3 nanosheets for aqueous phase reforming of biogas slurry: Simultaneous renewable hydrogen production and treatment," Renewable Energy, Elsevier, vol. 256(PD).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pd:s0960148125017719
    DOI: 10.1016/j.renene.2025.124107
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    References listed on IDEAS

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    1. Wang, Jian & Wang, Yincheng & Dong, Xiaoshan & Hu, Yongjie & Tao, Junyu & Kumar, Akash & Yan, Beibei & Chen, Yuxuan & Su, Hong & Chen, Guanyi, 2024. "Insights into behaviors of functional groups in biomass derived products during aqueous phase reforming over Ni/α-MoO3 catalysts," Renewable Energy, Elsevier, vol. 224(C).
    2. Wang, Zhi & Li, Jian & Yan, Beibei & Zhou, Shengquan & Zhu, Xiaochao & Cheng, Zhanjun & Chen, Guanyi, 2024. "Thermochemical processing of digestate derived from anaerobic digestion of lignocellulosic biomass: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 199(C).
    3. Oliveira, A.S. & Baeza, J.A. & Garcia, D. & Saenz de Miera, B. & Calvo, L. & Rodriguez, J.J. & Gilarranz, M.A., 2020. "Effect of basicity in the aqueous phase reforming of brewery wastewater for H2 production," Renewable Energy, Elsevier, vol. 148(C), pages 889-896.
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