Abstract
In this study, Ni–Cu alloy nanoparticle catalysts for dry reforming of methane (DRM) were synthesized by one-step hydrothermal method. The results demonstrated that the addition of Cu into Ni/BC could form Ni–Cu alloy and strengthened the electron transfer, which was beneficial to smaller Ni particle size formation and higher dispersion of Ni particles. When Ni/Cu ratio was increased from 0 to 7:1 (Ni7Cu1/BC), Ni particle size was decreased from 8.56 to 6.32 nm. CH4 and CO2 conversion rate over Ni/BC were 40.21% and 75.90%, which were increased to 89.41% and 97.64% over Ni7Cu1/BC. Especially, Cu addition would inhibit the reverse water gas shift reaction, and H2/CO was obviously increased from 0.63 (Ni/BC) to 0.96 (over Ni7Cu1/BC). However, the excess Cu addition suppressed the catalytic activity for DRM. TG and TEM revealed that there was no obvious graphitic carbon on the used Ni7Cu1/BC, and CH4/CO2 conversion rate was well kept after 24 h reaction.
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Acknowledgements
The present work is supported by Technology Innovation Special Foundation of Hubei Province (Grant Nos. 2022BCA085, 2021BCA151, 2020BAB074 and 2020ZYYD019), and Wuhan Municipal Science and Technology Project (Grant No. 2020020601012275). We would like to thank Mrs Jinhui Zhou at the Analytical and Testing Center of Wuhan University of Science and Technology for the help on TEM analysis.
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Kong, L., Qin, L., Zhao, B. et al. Preparation of Nanoscale Ni–Cu Supported Over Hydrochar by Hydrothermal Method and Effect of Ni/Cu Ratio on Catalytic Performances in Dry Reforming of Methane. Catal Lett 154, 144–154 (2024). https://doi.org/10.1007/s10562-023-04280-8
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DOI: https://doi.org/10.1007/s10562-023-04280-8