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¸÷λ´óÉñ£¬ÎÄÏ×ÖвÄÁϺϳɹý³ÌΪ£º400 mg of the as-prepared MOF-253was dispersed with a certain amount of H2PtCl6¡¤6H2O (0.0211, 0.0444, and 0.1 mg) in acetonitrile (15 mL). The obtained solution was then heated at 85 ¡ãC in a Teflon-capped autoclave for 72 h. The formed solids were collected by centrifugation and then immersed in acetonitrile (15 mL) for 3 days. The solvent was replaced with fresh acetonitrile every 24 h. The products were then collected by filtration and dried at 150 ¡ãC for 12 h in vacuum. The obtained Pt@MOF-253 solids were then heat-treated at 900 ¡ãC at a ramp rate of 1 ¡ãC min¨C1 for 4 h in Ar atmosphere. Finally, the samples were pickled with NaOH solution at 70 ¡ãC for 6 h to remove inactive Al-metal species and residues, followed by thorough washing in deionized water until the resultant solution had a neutral pH, before finally being dried under vacuum at 80¨C110 ¡ãC. For simplicity, the as-obtained catalysts were labelled as Pt@N/C-x, where x represents 2%, 5%, and 10% of Pt-loading in the catalyst.
400 mg MOF-253·Ö±ðÓëH2PtCl6¡¤6H2O (0.0211, 0.0444, and 0.1mg)»ìºÏ£¬ÖƱ¸³öPt@N/C£¬×îÖպϳɴ߻¯¼ÁÖÐPtº¬Á¿·Ö±ð¶ÔӦΪ2%, 5%, and 10%¡£ÒÔ2%Pt¸ºÔØÁ¿ÎªÀý£¬ÎÒËãÁËÏ£¬400 mg MOF-253È¥µôAl¡¢O¡¢HµÈÔªËØ£¨Ö»±£ÁôC/N£©Îª240.8mg£¬0.0211H2PtCl6¡¤6H2OÖÐPtµÄº¬Á¿Îª0.00794mg£¬ÑÏÖصÍÓÚ2%¡£ÌØ´ËÏòÄúÇó½ÌPt¸ºÔØÁ¿ÊÇÔõôȷ¶¨µÄ¡£Ð»Ð»~
ÎÄÕÂÀ´Ô´¡¶Robust MOF-253-derived N-doped carbon confinement of Pt single nanocrystal electrocatalysts for oxygen evolution reaction¡· |
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