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![Constructing bimetal, alloy, and compound-modified nitrogen-doped biomass-derived carbon from coconut shell as accelerants for boosting methane production in bioenergy system](https://image.oaes.cc/2581ab7d-d74c-486e-b68c-24d48030e96a/em4062.fig.1.jpg)
Figure 1. Illustration for the preparation process of Ni-N-C, Fe-N-C, and Fe/Ni-N-C (Blue line: synthesis path of Ni-N-C; Green line: synthesis path of Fe-N-C; Red line: synthesis path of Fe/Ni-N-C).
Figure 1. Illustration for the preparation process of Ni-N-C, Fe-N-C, and Fe/Ni-N-C (Blue line: synthesis path of Ni-N-C; Green line: synthesis path of Fe-N-C; Red line: synthesis path of Fe/Ni-N-C).
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