Sodium hydroxide-assisted growth of uniform Pd nanoparticles on nanoporous carbon MSC-30 for efficient and complete dehydrogenation of formic acid under ambient conditions
Sodium hydroxide-assisted growth of uniform Pd nanoparticles on nanoporous carbon MSC-30 for efficient and complete dehydrogenation of formic acid under ambient conditions
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DOI：
10.1039/c3sc52448e
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发表时间：
2014-01-01
期刊：
影响因子：
8.4
通讯作者：
Xu, Qiang
中科院分区：
文献类型：
--
作者：
Zhu, Qi-Long;Tsumori, Nobuko;Xu, Qiang
采用氢氧化钠辅助还原法制备了高度分散的Pd纳米颗粒(NPs)。在粒子的形成和生长过程中，通过氢氧化钠的修饰，可以得到在碳表面上分散良好的超细钯纳米粒子。金属与载体之间明显的相互作用和纳米粒子的高分散性极大地提高了催化剂的催化性能，在50℃时，甲酸(FA)多相催化分解的转化率(TOF)达到2623h(-1)，H-2选择性为100%，这是在常温条件下报道的最高值，可与最活跃的均相催化剂相媲美。即使在25℃下，也可以实现高达750h(-1)的甲酸完全脱氢。
Highly dispersed Pd nanoparticles (NPs) deposited on nanoporous carbon MSC-30 have been successfully prepared with a sodium hydroxide-assisted reduction approach. The modification by NaOH during the formation and growth of particles results in the well-dispersed ultrafine Pd NPs on carbon. The combination of distinct interaction between metal and support and high dispersion of NPs drastically enhances the catalytic performance of the resulted catalyst, over which the turnover frequency (TOF) for heterogeneously catalyzed decomposition of formic acid (FA) reaches 2623 h (-1) at 50 degrees C with 100% H-2 selectivity, the highest value ever reported under ambient conditions, comparable to those acquired from the most active homogeneous catalysts. Even at 25 degrees C, the complete dehydrogenation of FA with a TOF as high as 750 h(-1) can be achieved.