在三效催化反应中镍铜合金催化剂的自再生。
Self-regeneration of a Ni-Cu alloy catalyst during a three-way catalytic reaction.
机构信息
Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Undergraduate School of Industrial Chemistry, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
出版信息
Phys Chem Chem Phys. 2019 Sep 11;21(35):18816-18822. doi: 10.1039/c9cp01884k.
Ni-Cu alloy supported on γ-Al2O3 catalysts prepared by high-temperature hydrogen reduction exhibit high catalytic activity and durability for a three-way catalytic reaction under both oxidative and reductive conditions because of their self-regenerating feature. DFT calculations showed that Ni-oxide was reduced to Ni metal by CO in the presence of Cu metal because of the Ni-Cu alloy effect but was not in the absence of Cu metal.
负载在 γ-Al2O3 上的 Ni-Cu 合金催化剂经过高温氢气还原后，表现出在氧化和还原条件下均具有高的三效催化反应活性和稳定性，这归因于其自再生特性。DFT 计算表明，在 Cu 金属存在的情况下，Ni 氧化物被 CO 还原为 Ni 金属，这是由于 Ni-Cu 合金的作用，但在没有 Cu 金属的情况下则不会发生。
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