Size-controllable synthesis and high-performance formic acid oxidation of polycrystalline Pd nanoparticles
来源期刊：Rare Metals2019年第2期
论文作者：Hui-Hui Wang Jin-Feng Zhang Ze-Lin Chen Meng-Meng Zhang Xiao-Peng Han Cheng Zhong Yi-Da Deng Wen-Bin Hu
文章页码：115 - 121
摘 要：A facile approach was developed for the synthesis of polycrystalline palladium nanoparticles（Pd NPs）by using tannic acid（TA） as green reagent and stabilizer in a 30 ℃ water bath. The size of Pd NPs can be tuned in a range of 10–60 nm simply by adjusting the concentration of Pd precursor. The catalytic activity and stability of the as-obtained Pd NPs toward formic acid oxidation were analyzed. It is found that these Pd NPs with different sizes exhibit size-dependent and enhanced formic acid oxidation performance compared to the commercial Pd black catalyst. It should be noted that the Pd catalysts with an average size of 24 nm demonstrate the best catalytic activity and stability among the other prepared Pd NPs, which can be ascribed to its larger electrochemical surface area（ECSA）and polycrystalline structure with defects.
Hui-Hui Wang，Jin-Feng Zhang，Ze-Lin Chen，Meng-Meng Zhang，Xiao-Peng Han，Cheng Zhong，Yi-Da Deng，Wen-Bin Hu
Tianjin Key Laboratory of Composites and Functional Materials and Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University
摘 要：A facile approach was developed for the synthesis of polycrystalline palladium nanoparticles（Pd NPs）by using tannic acid（TA） as green reagent and stabilizer in a 30 ℃ water bath. The size of Pd NPs can be tuned in a range of 10–60 nm simply by adjusting the concentration of Pd precursor. The catalytic activity and stability of the as-obtained Pd NPs toward formic acid oxidation were analyzed. It is found that these Pd NPs with different sizes exhibit size-dependent and enhanced formic acid oxidation performance compared to the commercial Pd black catalyst. It should be noted that the Pd catalysts with an average size of 24 nm demonstrate the best catalytic activity and stability among the other prepared Pd NPs, which can be ascribed to its larger electrochemical surface area（ECSA）and polycrystalline structure with defects.
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