In this communication report, a comparative study between P-doped Pd/CNT and bare Pd/CNT catalyst was carried out to decouple the effects of phosphorous-doping on electro-oxidation of glycerol. The initial characterization results suggested that Pd and its oxides were successfully incorporated within the pore channels of CNTs support for both catalysts by using hydrazine-assisted hydrothermal technique. The XPS results revealed that the amount of Pd²⁺ for bare Pd/CNT were 1.4 times higher than P-doped electrocatalysts (about 70.1% and 48.7%, respectively) which confirms that phosphorus facilitates the reduction of Pd²⁺ to metallic Pd (Pd⁰). The electrochemical results showed that the electrochemical surface area (392.22 m² g_Pd⁻¹) and current density (26 mA/cm²) for P-doped Pd/CNT catalyst were 2.84 and 1.6 times, respectively, higher than Pd/CNT catalyst. The P-doped catalyst was found to suppress the formation of carbonaceous intermediates; thus, improved the glycerol oxidation reaction. Small quantities of deep oxidation side products such as mesoxalic acid (<2%) and tartronic acid (<0.1%) were found along with the dihydroxyacetone (DHA), a major product of glycerol electro-oxidation. The best performing catalyst exhibited 1.4 folds higher DHA selectivity (90.8%) compared to the Pd/CNT.

在此通讯报告中，进行了P掺杂Pd / CNT与裸Pd / CNT催化剂之间的比较研究，以消除磷掺杂对甘油电氧化的影响。初步表征结果表明，使用肼辅助水热技术可将Pd及其氧化物成功地结合到CNTs载体的孔道中，以支持这两种催化剂。XPS结果表明，裸露Pd / CNT的Pd ²⁺含量是P掺杂电催化剂的1.4倍（分别约为70.1％和48.7％），这证实了磷有助于Pd ²⁺还原为金属Pd（ Pd ⁰）。电化学结果表明，电化学表面积（392.22 m ² g掺P的Pd / CNT催化剂的_Pd ^-1）和电流密度（26 mA / cm ²）分别是Pd / CNT催化剂的2.84倍和1.6倍。发现掺P的催化剂可以抑制碳质中间体的形成；因此，改善了甘油的氧化反应。发现了少量的深层氧化副产物，如中草酸（<2％）和酒石酸（<0.1％），以及甘油电氧化的主要产物二羟基丙酮（DHA）。与Pd / CNT相比，性能最好的催化剂具有更高的DHA选择性1.4倍（90.8％）。