Developing a comprehensive strategy and superior catalysts for alcohol oxidation is essential for real applications of direct alcohol fuel cells. By adding palladium (Pd) onto the nickel (Ni) nanoparticles loaded on a mixed multiwalled carbon nanotubes (CNTs) and carbon black (CB) support by a reduction method with 10 wt% Pd and 10 wt% Ni, various weight ratios carbon compositions of Pd-xCNT-Ni-yCB catalyst materials (x and y = 1–2) were also studied. Well-dispersed Pd nanoparticles with average particle sizes of 3.3 and 5.5 nm were present on the 1CNT-Ni-2CB and 1CNT-2CB composite supports, respectively. X-ray photoelectron spectroscopy (XPS) analysis indicated that Pd exhibits a metallic palladium surface state with some fraction of NiO and Ni(OH)₂ species. Alcohol oxidation e.g., methanol, ethanol, and iso-propanol in alkaline electrolytes was investigated by electrochemical measurements and analysis. Compared with single carbon catalysts, e.g., Pd-CNT and Pd-CB catalysts, in studies involving methanol, ethanol and isopropanol oxidation, most Pd-xCNT-Ni-yCB catalysts show high activity. The best performance obtained by Pd-1CNT-Ni-2CB could be related to the increased kinetics reaction and instantaneous presence of the bifunctional mechanism and electronic effect, resulting in a Pd and Ni alloy with a small amount of Ni(OH)₂ in the xCNT-Ni-yCB composite support surfaces.

开发全面的醇氧化策略和优质催化剂对于直接醇燃料电池的实际应用至关重要。通过还原法将钯(Pd) 添加到负载在混合多壁碳纳米管(CNT) 和炭黑 (CB) 载体上的镍 (Ni) 纳米颗粒上，采用 10 wt% Pd 和 10 wt% Ni、各种重量比的碳组合物还研究了 Pd-xCNT-Ni-yCB 催化剂材料（x 和 y = 1-2）。1CNT-Ni-2CB 和 1CNT-2CB 复合载体上分别存在平均粒径为 3.3 和 5.5 nm 的分散良好的 Pd 纳米颗粒。X射线光电子能谱(XPS)分析表明Pd表现出金属钯表面态，并含有一定比例的NiO和Ni(OH) ₂物质。通过电化学测量和分析研究了碱性电解质中的醇氧化（例如甲醇、乙醇和异丙醇） 。与单碳催化剂（例如Pd-CNT和Pd-CB催化剂）相比，在涉及甲醇、乙醇和异丙醇氧化的研究中，大多数Pd-xCNT-Ni-yCB催化剂表现出高活性。Pd-1CNT-Ni-2CB 获得的最佳性能可能与动力学反应的增加以及双功能机制和电子效应的瞬时存在有关，从而产生了 Pd 和 Ni 合金，其中含有少量 Ni(OH) ₂ xCNT-Ni-yCB 复合材料支撑表面。