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Single-atom catalysts (SACs) have opened up an era of great opportunities for catalytic science and industrial technology, and have fueled the rapid progress of catalytic research [1-3].SACs not only represent the ultimate atomic utilization efficiency of metal materials, but have also driven the quantitative-to-qualitative evolution of catalytic properties of materials brought about by size reduction.Thus, single-atom catalysis is a breakthrough in catalysis science towards atomicagy precise catalysis.