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Anchoring IrPdAu Nanoparticles on NH2‑SBA-15 for Fast Hydrogen Production from Formic Acid at Room Temperature

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journal contribution
posted on 05.02.2020, 21:29 by Yixing Luo, Qifeng Yang, Wendan Nie, Qilu Yao, Zhujun Zhang, Zhang-Hui Lu
Hydrogen (H2), a regenerable and promising energy carrier, acts as an essential role in the construction of a sustainable energy system. Formic acid (HCOOH, FA), a natural biological metabolic products and also accessible through carbon dioxide (CO2) reduction, has a great potential to serve as a prospective H2 supplier for the fuel cell. Herein, ultrafine and electron-rich IrPdAu alloy nanoparticles with a size of 1.4 nm are highly dispersed on amine-modified mesoporous SiO2 (NH2-SBA-15) and used as a highly active and selective catalyst for fast H2 production from FA. The as-synthesized IrPdAu/NH2-SBA-15 possesses superior catalytic activity and 100% H2 selectivity with initial turnover frequency values of 6316 h–1 with the additive of sodium formate (SF) and 4737 h–1 even without SF at 298 K, comparable to the most effective heterogeneous catalysts ever published. The excellent performance of IrPdAu/NH2-SBA-15 was not only ascribed to the combination of the electronic synergistic effect of trimetallic alloys and the strong metal–support interaction effect but also attributed to the amine (−NH2) alkaline groups grafted on SBA-15, which is beneficial to boost the split of the O–H bond of FA.