Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM) , Soochow University , Suzhou 215123 , P. R. China.
ACS Appl Mater Interfaces. 2018 Oct 3;10(39):33153-33161. doi: 10.1021/acsami.8b09297. Epub 2018 Sep 19.
Highly efficient electrocatalysis for clean, efficient, and sustainable energy supply, such as hydrogen evolution reaction (HER) and formic acid oxidation reaction (FAOR), has drawn enthusiastic and worldwide attention. Universal and efficient electrocatalysts for these reactions are essential elements for the development of renewable and clean energy technologies. Herein, we show the design and fabrication of the rhodium nanoparticles modified fluorine-doped graphene (Rh/F-graphene) catalyst using silicon nanowires (SiNWs) as the sacrifice template. The optimized Rh/F-graphene catalyst (Rh/F-graphene-2) has a low Rh mass fraction of 9.4% and F doping of 4.0%. The mean diameter of Rh is 9.39 nm. Rh/F-graphene-2 serves as a proton-adsorption-dominated multifunctional electrocatalyst for both HER and FAOR with performance superior to 20 wt % Pt/C in acidic solution. In addition, due to the doping of fluorine, the stability of Rh/F-graphene-2 catalyst greatly improves and is the best among all the compared electrocatalysts. This design for multifunctional catalysts could greatly increase the utilization ratio of Rh, which may provide a new avenue for the preparation of other noble metal-based catalysts.
高效电催化对于清洁、高效和可持续的能源供应至关重要，如析氢反应（HER）和甲酸氧化反应（FAOR）。通用且高效的电催化剂是可再生清洁能源技术发展的关键要素。本文展示了使用硅纳米线（SiNWs）作为牺牲模板设计和制备铑纳米颗粒修饰的氟化石墨烯（Rh/F-graphene）催化剂。优化后的 Rh/F-graphene 催化剂（Rh/F-graphene-2）铑质量分数低至 9.4%，氟掺杂量为 4.0%。Rh 的平均直径为 9.39nm。Rh/F-graphene-2 在酸性溶液中作为质子吸附主导的多功能电催化剂，同时具有优于 20wt%Pt/C 的 HER 和 FAOR 性能。此外，由于氟的掺杂，Rh/F-graphene-2 催化剂的稳定性大大提高，在所有比较的电催化剂中表现最佳。这种多功能催化剂的设计可以大大提高 Rh 的利用率，为其他贵金属基催化剂的制备提供了新途径。
