Hosseini Mir Ghasem, Daneshvari-Esfahlan Vahid, Wolf Sigrid, Hacker Viktor
Electrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz Tabriz 51666-16471 Iran.
Institute of Chemical Engineering and Environmental Technology, Graz University of Technology Inffeldgasse 25/C 8010 Graz Austria.
RSC Adv. 2021 Dec 8;11(62):39223-39232. doi: 10.1039/d1ra07099a. eCollection 2021 Dec 6.
Nitrogen-doped reduced graphene oxide-supported palladium-cobalt nanoparticles (PdCo NPs/NrGO NSs) are synthesized and used as a high-performance and low-cost anodic catalyst for direct hydrazine-hydrogen peroxide fuel cells. The SEM and TEM images of PdCo NPs/NrGO NSs show the uniform metal nanoparticle distribution on the NrGO NSs. The reduction of the oxygen functional groups and the doping of the nitrogen atoms in the GO framework are confirmed by FT-IR and XRD spectroscopic studies. The Pd catalysts modified by Co exhibit a higher catalytic activity, lower onset potential, better durability, and lower impedance values than unmodified Pd catalysts for the electro-oxidation of hydrazine. The kinetic studies show a first-order reaction with an activation energy of 12.51 kJ mol. A direct hydrazine-hydrogen peroxide fuel cell with PdCo NPs/NrGO NSs as anode and Pt/C as cathode provides an open circuit voltage of 1.76 V and a maximum power density of 148.58 mW cm at 60 °C, indicating that the PdCo NPs/NrGO NSs are an economical, high performance and reliable anode catalyst for the direct hydrazine-hydrogen peroxide fuel cell.
合成了氮掺杂还原氧化石墨烯负载的钯钴纳米颗粒（PdCo NPs/NrGO NSs），并将其用作直接肼-过氧化氢燃料电池的高性能低成本阳极催化剂。PdCo NPs/NrGO NSs的扫描电子显微镜（SEM）和透射电子显微镜（TEM）图像显示金属纳米颗粒在NrGO NSs上分布均匀。傅里叶变换红外光谱（FT-IR）和X射线衍射（XRD）光谱研究证实了氧化石墨烯（GO）骨架中氧官能团的还原和氮原子的掺杂。与未改性的Pd催化剂相比，Co改性的Pd催化剂对肼的电氧化表现出更高的催化活性、更低的起始电位、更好的耐久性和更低的阻抗值。动力学研究表明该反应为一级反应，活化能为12.51 kJ/mol。以PdCo NPs/NrGO NSs为阳极、Pt/C为阴极的直接肼-过氧化氢燃料电池在60℃时开路电压为1.76 V，最大功率密度为148.58 mW/cm²，表明PdCo NPs/NrGO NSs是直接肼-过氧化氢燃料电池经济、高性能且可靠的阳极催化剂。
