Strong Metal–Support\nInteraction Facilitated\nMulticomponent Alloy Formation on Metal Oxide Support

Abstract

Multicomponent alloy (MA) contains\na nearly infinite\nnumber of\nunprecedented active sites through entropy stabilization, which is\na desired platform for exploring high-performance catalysts. However,\nMA catalysts are usually synthesized under severe conditions, which\ninduce support structure collapse and further deteriorate the synergy\nbetween MA and support. We propose that a strong metal–support\ninteraction (SMSI) could facilitate the formation of MA by establishing\na tunnel of oxygen vacancy for metal atom transport under low reduction\ntemperature (400–600 °C), which exemplifies the holistic\ndesign of MA catalysts without deactivating supports. PtPdCoFe MA\nis readily synthesized on anatase TiO₂ with the help of\nSMSI, which exhibits good catalytic activity and stability for methane\ncombustion. This strategy demonstrates excellent universality on various\nsupports and multicomponent alloy compositions. Our work not only\nreports a holistic synthesis strategy for MA synthesis by synergizing\nunique properties of reducible oxides and the mixing entropy of alloy\nbut also offers a new insight that SMSI plays a vigorous role in the\nformation of alloy NPs on reducible oxides.