The main challenges to the direct methanol fuel cell (DMFC) are the limited catalytic activity and durability of electrocatalysts. Developing active, cost-effective and stable electrocatalysts with earth-abundant metals (Fe, Co, Ni) is a prerequisite to boost the commercial application of DMFCs. Herein, cobalt-iron layer double hydroxides (CoFe-LDH) nanorods coupled with graphene oxides (GO) are directly synthesized on Nickel foam (NF), which are used directly as a noble metal-free electrocatalyst for methanol oxidation reaction (MOR). Among the as-synthesized noble metal-free CoFe-LDH/GO/NF electrocatalysts, Co2Fe1-LDH/GO/NF exhibits a high electrochemical activity of 490.88 mA cm⁻² in alkaline solution. The prolong Cyclic voltammograms (CVs) scanning (over 500 cycles) verifies that the Co2Fe1-LDH/GO/NF electrode achieves a better overall performance and stability with only 3% decay than that of Co1Fe1-LDH/GO/NF and Co3Fe1-LDH/GO/NF for MOR. The excellent electrocatalytic activity of Co2Fe1-LDH/GO/NF is attributed to high exposed surface active sites, abundant oxygen vacancies, and efficient electron transfer between the electrocatalyst and the electrode surface. This study about the noble metal-free electrocatalyst may provide a new idea to improve the electrocatalytic activity for MOR.

直接甲醇燃料电池（DMFC）的主要挑战是有限的催化活性和电催化剂的耐久性。用富含地球的金属（Fe，Co，Ni）开发活性，成本效益高且稳定的电催化剂是促进DMFC的商业应用的先决条件。本文中，在石墨泡沫镍（NF）上直接合成了钴-铁层双氢氧化物（CoFe-LDH）纳米棒和氧化石墨烯（GO），它们直接用作甲醇氧化反应（MOR）的无贵金属电催化剂。在合成的不含贵金属的CoFe-LDH / GO / NF电催化剂中，Co2Fe1-LDH / GO / NF的电化学活性高达490.88 mA cm ^-2在碱性溶液中。延长的循环伏安图（CV）扫描（超过500个循环）证明，Co2Fe1-LDH / GO / NF电极具有比Co1Fe1-LDH / GO / NF和Co3Fe1-LDH更好的整体性能和稳定性，且衰减仅为3％ / GO / NF用于MOR。Co2Fe1-LDH / GO / NF的优异电催化活性归因于高暴露的表面活性中心，丰富的氧空位以及电催化剂与电极表面之间的有效电子转移。有关无贵金属电催化剂的研究可能为提高MOR的电催化活性提供新的思路。