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首页> 外文期刊>Catalysis science & technology >Phase junction-confined single-atom TiO2-Pt-1-CeO2 for multiplying catalytic oxidation efficiency
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Phase junction-confined single-atom TiO2-Pt-1-CeO2 for multiplying catalytic oxidation efficiency

机译：单原子TiO2-Pt-1-CeO2 junction-confined阶段用催化氧化效率

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摘要

Single-atom catalysts (SACs) are advocated for theoretical 100% atom efficiency and high reactivity. Further breakthroughs in catalytic efficiency beyond the present SACs will rely on upgrading the intrinsic activity of each active site via sophisticated catalyst design, which is undoubtedly challenging. Herein, we report the use of the phase junction confinement principle to construct a TiO2-Pt-1-CeO2 ensemble with unprecedented reactivity. The reduction-durable TiO2-Pt-1-CeO2 unit enabled weakened CO affinity and extensive lattice oxygen activation, which subsequently led to facilitated O-2 activation. Additionally, the TiO2-Pt-1-CeO2 interface structure initiated a unique cross-phase oxidation mechanism. The balanced adsorption behaviour, enhanced surface lattice oxygen reactivity, and substantially lowered reaction barrier enabled such a catalyst to realize a great increase in CO oxidation efficiency (300 K) with multiplied specific mass reactivity compared to the impregnated analogue and the pilot Pt-1/FeOx catalyst. This work demonstrates a plausible synthesis philosophy and reaction mechanism for SACs that will create a new frontier in reactivity.
机译：单原子催化剂(囊)的主张理论原子效率和高100%反应性。囊将依靠效率以外的礼物升级的内在活动活跃网站通过复杂的催化剂设计,这是无疑具有挑战性。使用阶段结约束原则构建一个TiO2-Pt-1-CeO2合奏前所未有的反应性。TiO2-Pt-1-CeO2单位启用削弱了亲和力和广泛的晶格氧活化随后导致了0 2激活。此外,TiO2-Pt-1-CeO2接口发起一个独特的cross-phase结构氧化机制。行为,增强表面晶格氧反应性,大大降低了反应使这种催化剂实现的障碍大增加CO氧化效率(300 K)质量乘以特定反应性比较浸渍模拟和飞行员Pt-1 / FeOx催化剂。哲学和合理的合成反应囊,将创建一个新的机制在反应性边界。

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