Centre for Semiconductor Components and Nanotechnology (CCS-Nano), University of Campinas (UNICAMP), Campinas, 1308-870 Sao Paulo, Brazil.
Department of Analytical Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, 13084-974 Sao Paulo, Brazil.
J Colloid Interface Sci. 2018 Apr 1;515:160-171. doi: 10.1016/j.jcis.2018.01.028. Epub 2018 Jan 8.
Palladium nanoparticles decorated reduced graphene oxide (Pd-rGO) and palladium nanoparticles intercalated inside nitrogen doped reduced graphene oxide (Pd-NrGO) hybrids have been synthesized by applying a very simple, fast and economic route using microwave-assisted in-situ reduction and exfoliation method. The Pd-NrGO hybrids materials show good activity as catalyst for ethanol electro oxidation for direct ethanol fuel cells (DEFCs) as compared to Pd-rGO hybrids. The enhanced direct ethanol fuel cell can serve as alternative to fossil fuels because it is renewable and environmentally-friendly with a high energy conversion efficiency and low pollutant emission. As proof of concept, the electrocatalytic activity of Pd-NrGO hybrid material was accessed by cyclic voltammetry in presence of ethanol to evaluate its applicability in direct-ethanol fuel cells (DEFCs). The Pd-NrGO catalyst presented higher electro active surface area (∼6.3 m g) for ethanol electro-oxidation when compared to Pd-rGO hybrids (∼3.7 m g). Despite the smaller catalytic activity of Pd-NrGO, which was attributed to the lower exfoliation rate of this material in relation to the Pd-rGO, Pd-NrGO showed to be very promising and its catalytic activity can be further improved by tuning the synthesis parameters to increase the exfoliation rate.
钯纳米粒子修饰还原氧化石墨烯（Pd-rGO）和钯纳米粒子插层氮掺杂还原氧化石墨烯（Pd-NrGO）杂化物已经通过应用一种非常简单、快速和经济的方法，利用微波辅助原位还原和剥离方法合成。与 Pd-rGO 杂化物相比，Pd-NrGO 杂化物材料作为直接乙醇燃料电池（DEFCs）中乙醇电氧化的催化剂表现出良好的活性。增强的直接乙醇燃料电池可以替代化石燃料，因为它是可再生的、环保的，具有高能量转换效率和低污染物排放。作为概念验证，通过在存在乙醇的情况下进行循环伏安法评估 Pd-NrGO 杂化物材料在直接-乙醇燃料电池（DEFCs）中的应用，来评估其电催化活性。与 Pd-rGO 杂化物（∼3.7 m g）相比，Pd-NrGO 催化剂在乙醇电氧化中表现出更高的电活性表面积（∼6.3 m g）。尽管 Pd-NrGO 的催化活性较低，这归因于与 Pd-rGO 相比，该材料的剥离率较低，但 Pd-NrGO 表现出非常有前途的特性，并且可以通过调整合成参数来进一步提高其催化活性，以增加剥离率。
