Abstract This paper describes the synthesis of Pd nanoparticles supported on Ni(OH)2/C with different proportions of Pd:Ni(OH)2 (30:70, 50:50, 70:30) and their catalytic activity towards the oxidation of ethanol in alkaline media. The catalysts are synthesised by a simple chemical reduction method. Electrochemical measurements show that Pd/Ni(OH)2/C catalysts with 30% of Ni(OH)2 nanosheets content yield the highest catalytic activity towards ethanol oxidation, exhibiting the highest mass activity of 8452.8 mA mg−1, which is 5-fold higher than at pure Pd catalyst. Additionally, electrochemical impedance spectra reveal lower values of charge transfer resistance for Pd70/Ni(OH)2(30)/C. The Pd70/Ni(OH)2(30)/C catalyst also displays excellent durability and stability during ethanol oxidation studied by chronoamperometric and cycling tests, reaching current densities almost six times higher than the Pd/C catalyst. The superior catalytic performance of the bimetallic Pd70/Ni(OH)2(30)/C catalyst can result from the synergy between the metals.

中文翻译：

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Ni(OH)2/C 上负载的 Pd 具有优异的乙醇电氧化活性。Ni(OH)2纳米片含量的影响

摘要 本文描述了不同比例的 Pd:Ni(OH)2 (30:70, 50:50, 70:30) 负载在 Ni(OH)2/C 上的 Pd 纳米粒子的合成及其对氧化的催化活性。碱性介质中的乙醇。催化剂通过简单的化学还原方法合成。电化学测量表明，Ni(OH)2 纳米片含量为 30% 的 Pd/Ni(OH)2/C 催化剂对乙醇氧化的催化活性最高，质量活性最高，为 8452.8 mA mg-1，为 5-倍高于纯 Pd 催化剂。此外，电化学阻抗谱显示 Pd70/Ni(OH)2(30)/C 的电荷转移电阻值较低。Pd70/Ni(OH)2(30)/C 催化剂在通过计时电流和循环测试研究的乙醇氧化过程中也表现出优异的耐久性和稳定性，达到的电流密度几乎是 Pd/C 催化剂的六倍。双金属 Pd70/Ni(OH)2(30)/C 催化剂的优异催化性能可以归因于金属之间的协同作用。