Pt-Au/MoS2 ternary catalyst for aqueous-phase reforming of methanol for hydrogen production

• 1、Zhejiang Sci-Tech University，Hangzhou 310018

Abstract：In order to realize the low temperature (70 oC) catalytic aqueous-phase reforming of methanol (APRM) for hydrogen production, the Pt-Au/MoS2 ternary catalyst with abundant sulfur vacancy (SV) was synthesized by excessive impregnation using molybdenum disulfide, chloroplatinic acid hexahydrate and Gold chloride trihydrate. XRD, XPS, H2-TPR, ESR and other characterization methods were performed to prove the catalyst\'s vacancies (SV) and Pt-Au duplex metal structures. Based on catalytic experiments, the catalyst can efficiently catalyze the APRM to produce hydrogen at low temperature conditions, and the turnover frequency (TOF) is 37.9 h-1. Combined with the infrared Fourier transform spectra and EPR, the catalytic reaction mechanism is analyzed. We attribute this exceptional hydrogen production to the outstanding ability of SV in MoS2 carrier to activate methanol at room temperature, and to the fact that Pt-Au bimetal structure inhibit the formation of CO intermediates in the process of methanol oxidation, which avoid catalyst CO poisoning and keep the metal active site in an efficient state. This paper establishes a connection between the catalyst microstructure and its objective properties, which provides a theoretical basis for the design of APRM hydrogen production catalyst.

Keywords： hydrogen production APRM duplex metal structure sulfur vacancy low temperature