青岛科技大学主页平台管理系统徐广蕊--中文主页-- Functionalized Ultrafine Rhodium Nanoparticles on Graphene Aerogels for the Hydrogen Evolution Reaction

Functionalized Ultrafine Rhodium Nanoparticles on Graphene Aerogels for the Hydrogen Evolution Reaction: 点击次数：; 关键字：HYDROTHERMAL SYNTHESIS; CATALYTIC PERFORMANCE; DOPED GRAPHENE; REDUCTION; ELECTROCATALYST; ELECTROLYSIS; SUPERIOR; OXIDE; 摘要：Water electrolysis over a wide pH range offers promising technology for hydrogen production, which requires highly stable and active electrocatalysts for the hydrogen evolution reaction (HER). Herein, polyallylamine (PA)-functionalized ultrafine rhodium nanoparticles (Rh-uNPs) uniformly anchored on three-dimensional graphene aerogel (GA) nanocomposites (PA@Rh-uNPs/GA) are synthesized by using a facile surface adsorption-chemical reduction method at room temperature. Physical characterization shows that the PA@Rh-uNPs/GA nanocomposites have three-dimensionally porous architecture and that PA@Rh-uNPs with a 1.3 nm size are uniformly dispersed on the GA surface. Electrochemical measurements show that the molecular weight of PA affects the HER activity of PA@Rh-uNP nanocomposites. The molecular weight-optimized PA@Rh-uNPs/GA nanocomposites with 10 % Rh mass show higher HER activity than the commercial 20 % Pt/C electrocatalyst over a wide pH range, which originates from proton or water enrichment at the electrode/solution interface due to the specific function of -NH2 groups at PA molecules.; 卷号：8; 期号：10; 是否译文：否

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