通过NaOH辅助还原法制备的负载在ZrO@C上的钯对甲酸分解具有增强的催化活性。
Enhanced catalytic activity over palladium supported on ZrO@C with NaOH-assisted reduction for decomposition of formic acid.
作者信息
Wang Tong, Li Fang, An Hualiang, Xue Wei, Wang Yanji
机构信息
Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology Tianjin 300130 China
出版信息
RSC Adv. 2019 Jan 24;9(6):3359-3366. doi: 10.1039/c8ra10198a. eCollection 2019 Jan 22.
A ZrO@C support based on t-ZrO embedded in amorphous carbon was obtained the pyrolysis of a UiO-66 precursor. Highly dispersed Pd nanoparticles (NPs) were subsequently deposited onto this support, using NaOH-assisted reduction, to obtain a formic acid (FA) decomposition catalyst. This material showed a turnover frequency (TOF) for the heterogeneously-catalyzed decomposition of FA of 8588 h at 60 °C, with 100% H selectivity. This performance is ascribed to the uniform dispersion of smaller palladium nanoparticles and a synergistic effect between the metal NPs and support. Even at 30 °C, the complete decomposition of FA was achievable in FA/SF (SF, sodium formate) solution, with a TOF as high as 1857 h.
通过对UiO-66前驱体进行热解，获得了一种基于嵌入无定形碳中的四方相氧化锆（t-ZrO）的ZrO@C载体。随后，采用NaOH辅助还原法将高度分散的钯纳米颗粒（NPs）沉积在该载体上，以获得甲酸（FA）分解催化剂。该材料在60℃下对FA的多相催化分解的周转频率（TOF）为8588 h⁻¹，氢气选择性为100%。这种性能归因于较小钯纳米颗粒的均匀分散以及金属NPs与载体之间的协同效应。即使在30℃下，在FA/甲酸钠（SF）溶液中也能实现FA的完全分解，TOF高达1857 h⁻¹。
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