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| 001 | 396766 | ||
| 005 | 20250730104436.0 | ||
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| 100 | 1 | _ | |a Lou, Yu |b 0 |
| 245 | _ | _ | |a Design of stable $Ni/ZrO_{2}$ catalysts for dry reforming of methane |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2017 |b Elsevier |
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| 520 | _ | _ | |a ZrO$_2$ supported Ni with an average particle diameter of 1–2 nm were synthesized by binding Ni$^{2+}$ in rccc-5,11,17,23-tetrahydroxy-2,8,14,20-tetra(n-decyl)resorcin[4]arene (pyrogallol[4]arene) nanocapsules as Ni precursor. The Ni/ZrO$_2$ catalyst with a 1.1 nm particle diameter showed outstanding stability in dry reforming of methane (DRM), which maintained nearly 90% of the initial activity after 60 h time on stream. The high stability is attributed to nearly all Ni atoms being located at the interface and perimeter to ZrO$_2$. This led to a higher accessibility to the oxygen from activated CO$_2$ at the Ni-ZrO$_2$ interface, facilitating conversion of surface carbon to CO. Ni/ZrO$_2$ catalysts with larger Ni particle diameter have a fraction of non-perimeter Ni that deactivates rapidly. The decrease of the H2 formation rate was faster with time on stream than the decrease of the H$_2$O formation rate. At longer time on stream the ratio of H$_2$O to H$_2$ yield reached 0.40 ± 0.08 for all Ni/ZrO$_2$ catalysts, independently if a catalyst was stable from the reaction start or deactivated to a stable level. The ratio between H$_2$O and H$_2$ yield reflects the abundance of oxygen availability on the Ni surface, the oxygen availability index (OAI). For an OAI value of 0.40, the deactivation of Ni catalyst was negligible, while below that deactivation was pronounced. The reorganization of surface carbon to graphitic overlayers and carbon fibers is hypothesized to start from surface domains that are not adjacent to the metal-support perimeter. |
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| 700 | 1 | _ | |a Zhang, Qi |b 2 |
| 700 | 1 | _ | |a Tiefenbacher, Konrad |b 3 |
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| 700 | 1 | _ | |a Liu, Yue |0 P:(DE-HGF)0 |b 6 |e Corresponding author |
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| 773 | _ | _ | |a 10.1016/j.jcat.2017.10.009 |g Vol. 356, p. 147 - 156 |0 PERI:(DE-600)1468993-5 |p 147 - 156 |t Journal of catalysis |v 356 |y 2017 |x 0021-9517 |
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