Ultrafine PdAg alloy nanoparticles anchored on NH2-functionalized 2D/ 2D TiO2 nanosheet/rGO composite as efficient and reusable catalyst for hydrogen release from additive-free formic acid at room temperature

• 作者: Xi Zhao Ping Dai Dongyan Xu Xumei Tao Xien Liu Qingjie Ge
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（8）
• 页码范围: 455-464
• 页数: 10页
• 语种: 英文

摘要

A 2D-2D titanium dioxide nanosheet-reduced graphene oxide (TNS-rGO) composite with better electronic conductivity and hydrophilicity was prepared by the hydrothermal method.The as-obtained TNS-rGO composite was further functionalized with 3-aminopropyltriethoxysilane (APTES) to provide a large amount of-NH2 groups on the surface for anchoring ultrafine PdAg alloy nanoparticles with an average particle size of 1.69 nm by a facile wet reduction approach.Benefiting from the combined effects of well-dispersed PdAg alloy nanoparticles,facilitated electron transfer from TNS-rGO to Pd,and increased electron density of active sites,the PdsAg1/NH2-TNS-rGO catalyst exhibited excellent activity towards dehydrogenation of formic acid without adding any additives at 298 K,corresponding to an initial turn over frequency as high as 1090 h-1,which is much higher than that of most other state-of-the-art catalysts.