The electrochemical oxidation of methanol was carried out using a series of dppm-bridged Ru/Pd, Ru/Pt and Ru/Au heterobimetallic complexes as catalysts. The major oxidation products were formaldehyde dimethyl acetal (dimethoxymethane, DMM) and methyl formate (MF). The Ru/Pd and Ru/Pt bimetallic catalysts generally afforded lower product ratios of DMM/MF and higher current efficiencies than the Ru/Au catalysts. The Ru/Au bimetallics exhibited product ratios and current efficiencies similar to those obtained from the Ru mononuclear compound CpRu(PPh3)2Cl. Increasing the methanol concentration afforded higher current efficiencies, while the addition of water to the samples shifted the product distribution toward the more highly oxidized product, MF.
                                    使用一系列以dppm为桥的Ru/Pd、Ru/Pt和Ru/Au异
金属络合物作为催化剂进行了
甲醇的电
化学氧化。主要的氧化产物是
甲醛二甲基醚(二甲氧基
甲烷,
DMM)和
甲酸甲酯(MF)。与Ru/Au催化剂相比,Ru/Pd和Ru/Pt双
金属催化剂通常提供更低的
DMM/MF产物比和更高的电流效率。Ru/Au双
金属催化剂表现出的产物比和电流效率与单核化合物CpRu(PPh3)2Cl获得的类似。提高
甲醇浓度可以提高电流效率,而向样品中添加
水则使产物分布向更高氧化产物MF偏移。