High-efficiency Methanol Oxidation Electrocatalyst Realized by Ultrathin PtRuM-O (M = Ni, Fe, Co) Nanosheets
The development of efficient electrocatalysts for methanol oxidation reaction (MOR) is crucial. Recently, PtRu-based ternary-metal materials are considered to be effective and best-performing CO anti-poisoning catalysts. However, the PtRu-based ternary-metal ultrathin (≤ 2 nm) nanosheets (NSs) catalysts with tailored composition for MOR are not reported. Here, a general method for controlling the synthesis of a class of ultrathin PtRuM-O (M = Ni, Fe, Co) NSs is reported for the first time. By optimizing the metal ratio, Pt7RuNi2-O NSs catalyst has the highest electrocatalytic activity (mass activity, 3.57 A mgPt-1) for MOR in PtRuM-O NSs, PtRu-O NSs, which is 10.5 times higher than that of commercial Pt/C (0.34 A mgPt-1). And the Pt7RuNi2-O NSs also has better stability and CO anti-poisoning property in the prepared materials. In addition, ultrathin Pt7RuNi2-O NSs catalyst also shows the highest performance at reported Pt-based catalysts for MOR in acidic medium.