花生壳基多孔碳负载Pd-Co催化剂应用于碱性介质中电氧化甲醇

以花生壳为原料，经KOH活化制备花生壳基多孔碳（HC）。氮气吸附-脱附研究表明，所获得的多孔碳的总表面积高达1 645 m²·g^-1。采用浸渍还原法制备了以HC为载体的Pd-Co/HC催化剂。X射线衍射（XRD）和X射线光电子能谱（XPS）分析表明，催化剂中的Co主要以Co和CoO的形式存在，Co进入Pd的晶格并形成Pd-Co合金。Pd-Co/HC_0.5-700的透射电子显微镜（TEM）结果显示，Pd-Co纳米颗粒具有较小粒径（约4 nm）且成功地分散在HC上。Pd-Co/HC_0.5-700在碱性介质中电催化氧化甲醇时表现出优秀的电催化活性、稳定性和CO耐受性，这种显著的高性能可以归因于生物质载体大的表面积和Co的成功掺杂。

Peanut shell-based porous carbon supported Pd-Co catalyst for electrooxidation of methanol in alkaline media

Peanut shells were used as raw materials and activated to peanut shell-based porous carbon (HC) by KOH. Nitrogen adsorption-desorption studies showed that the obtained porous carbon featured a total surface area as high as 1 645 m²·g^-1. Pd-Co/HC catalyst was prepared by the impregnation reduction method, in which HC was the carrier. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis demonstrated that Co in the catalyst was mainly in the form of Co and CoO, and Co was entered into the crystal lattice of Pd and formed a Pd-Co alloy. The TEM image of Pd-Co/HC_0.5-700 showed that numerous Pd-Co nanoparticles were successfully dispersed in the prepared porous carbon with a small particle size (ca. 4 nm). Pd-Co/HC_0.5-700 exhibited apparent electrocatalytic activity, CO tolerance, and stability towards methanol electrooxidation in alkaline media. This remarkable high performance can be attributed to the large surface area of the biomass carrier and the doping of Co into Pd.