Self-regeneration of a Ni-Cu alloy catalyst during a three-way catalytic reaction
Self-regeneration of a Ni-Cu alloy catalyst during a three-way catalytic reaction
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DOI：
10.1039/c9cp01884k
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发表时间：
2019-09-21
影响因子：
3.3
通讯作者：
Tanaka, Tsunehiro
中科院分区：
文献类型：
--
作者：
Asakura, Hiroyuki;Onuki, Tetsuo;Tanaka, Tsunehiro
采用高温氢还原法制备的γ-Al 2 O3负载Ni-Cu合金催化剂，由于具有自再生特性，在氧化和还原条件下均表现出较高的催化活性和耐久性。DFT计算表明，在Cu金属存在下，由于Ni-Cu合金效应，Ni氧化物被CO还原为Ni金属，而在没有Cu金属存在下，Ni氧化物被CO还原为Ni金属。
Ni-Cu alloy supported on gamma-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.