Reduced graphene oxide aerogels doped with nitrogen have been prepared via two different strategies, namely, direct doping of rGO nanosheets with NH₃ (GANH3) and coating the rGO nanosheets with an N-containing amorphous carbon derived from polydopamine (GADA). Both methods lead to comparable N/C ratios (3.4–4.7 %) but the relative contribution of quaternary nitrogen is 30 % for GADA while only 15 % for GANH3. Moreover, the N is incorporated within graphene lattice for GANH3 while it is within an amorphous carbon layer on top of graphene nanosheets for GADA. The Ru catalyst supported on the aerogels exhibited very distinct performance in the selective oxidation of benzyl alcohol depending on the support material despite having similar Ru particle size. The best performance for 5 wt% Ru on GADA can be explained by the larger reduction extent of Ru and the more hydrophobic surface. The open macroporosity of the aerogel makes it an excellent platform for using as structured catalyst in a continuous flow process.

通过两种不同的策略，即用NH ₃直接掺杂rGO纳米片，已经制备了氮掺杂的还原氧化石墨烯气凝胶。（GANH3），并用衍生自聚多巴胺（GADA）的含N非晶碳涂覆rGO纳米片。两种方法的N / C比率均相当（3.4-4.7％），但季铵态氮对GADA的相对贡献为30％，而对于GANH3仅为15％。此外，N掺入了GANH3的石墨烯晶格中，而N则掺入了GADA的石墨烯纳米片顶部的无定形碳层中。尽管具有相似的Ru粒径，但负载在气凝胶上的Ru催化剂在苄醇的选择性氧化中表现出非常不同的性能，取决于载体材料。钌在GADA上的含量为5 wt％时，最佳性能可以解释为Ru的还原程度更大且表面更疏水。