Jiang Lu-Yao, Tian Fang-Min, Chen Xiao-Yan, Ren Xin-Xin, Feng Jiu-Ju, Yao Youqiang, Zhang Lu, Wang Ai-Jun
Key laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
Key laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
J Colloid Interface Sci. 2023 Nov;649:118-124. doi: 10.1016/j.jcis.2023.06.044. Epub 2023 Jun 12.
The fabrication of effective and stable electrocatalysts is crucial for practical applications of direct alcohol fuel cells (DAFCs). In this study, bimetallic PdCu nanostars (PdCu NSs) were fabricated by a Cu-modulated one-pot wet-chemical method, where cetyltrimethyl ammonium bromide (CTAB) worked as a structure-regulating reagent. The morphology, compositions, crystal structures and formation mechanism of the as-prepared PdCu NSs were investigated by a series of techniques. The unique architectures created abundant active sites, which resulted in a large electrochemical active surface area (9.5 m g). The PdCu NSs showed negative shifts in the onset potentials and large forward peak current densities by contrast with those of commercial Pd black for the catalytic ethylene glycol oxidation reaction (EGOR) and glycerol oxidation reaction (GOR). It revealed that the PdCu NSs outperformed Pd black in the similar surroundings. This work provides a constructive strategy for fabrication of high-efficiency electrocatalysts for alcohol fuel cells.
制备高效稳定的电催化剂对于直接醇类燃料电池（DAFCs）的实际应用至关重要。在本研究中，通过铜调制的一锅湿化学法制备了双金属钯铜纳米星（PdCu NSs），其中十六烷基三甲基溴化铵（CTAB）作为结构调节剂。采用一系列技术研究了所制备的PdCu NSs的形貌、组成、晶体结构和形成机理。独特的结构产生了丰富的活性位点，从而导致了较大的电化学活性表面积（9.5 m g）。与商业钯黑相比，PdCu NSs在催化乙二醇氧化反应（EGOR）和甘油氧化反应（GOR）时，起始电位出现负移，正向峰值电流密度较大。结果表明，在相似环境中，PdCu NSs的性能优于钯黑。这项工作为制备用于醇类燃料电池的高效电催化剂提供了一种建设性策略。
