Maximizing the utilization of noble metals is crucial for applications such as catalysis. We found that the minimum loading of platinum for optimal performance in the hydroconversion of n -alkanes for industrially relevant bifunctional catalysts could be reduced by a factor of 10 or more through the rational arranging of functional sites at the nanoscale. Intentionally depositing traces of platinum nanoparticles on the alumina binder or the outer surface of zeolite crystals, instead of inside the zeolite crystals, enhanced isomer selectivity without compromising activity. Separation between platinum and zeolite acid sites preserved the metal and acid functions by limiting micropore blockage by metal clusters and enhancing access to metal sites. Reduced platinum nanoparticles were more active than platinum single atoms strongly bonded to the alumina binder.

中文翻译：

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通过控制纳米粒子的位置最大化贵金属在固体催化剂中的利用率

最大限度地利用贵金属对于催化等应用至关重要。我们发现，为了在加氢转化中获得最佳性能，铂的最小负载量n通过在纳米尺度上合理安排功能位点，工业相关双功能催化剂的-烷烃可以减少 10 倍或更多。有意地将痕量的铂纳米颗粒沉积在氧化铝粘合剂或沸石晶体的外表面上，而不是在沸石晶体内部，在不影响活性的情况下提高了异构体的选择性。铂和沸石酸位之间的分离通过限制金属簇对微孔的阻塞和增强对金属位的访问来保留金属和酸的功能。还原的铂纳米颗粒比与氧化铝粘合剂牢固结合的铂单原子更活跃。