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Since the average Pd particle size of 12 nm is not small in general in heterogeneous catalysis, the claim with ¡°only 12 nm¡± should be revised.
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ÎÒÔ­ÎÄÊÇÕâôдµÄ ¡°The as-prepared Pd NPs had a broad size distribution with diameter ranging from 8 to 18 nm according to the particle size distribution histogram, and the average particle size was only 12 nm.¡±
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