ie9b03627_si_001.pdf (723.99 kB)
Effects of Cu Precursor Types on the Catalytic Activity of Cu/ZrO2 toward Methanol Synthesis via CO2 Hydrogenation
journal contribution
posted on 2019-10-09, 14:03 authored by Shohei Tada, Kazumasa Oshima, Yoshihiro Noda, Ryuji Kikuchi, Minoru Sohmiya, Tetsuo Honma, Shigeo SatokawaThis
paper presents the influence of different types of copper
precursors on CO2-to-methanol hydrogenation over copper
nanoparticles on amorphous ZrO2. Here, we chose copper
nitrate hydrate, copper acetate hydrate, and a copper ammine complex
as the precursor. A copper-acetate-based catalyst, which was precalcined
at 350 °C, was more active and selective toward methanol than
were the other catalysts. Regardless of the different copper precursors,
after calcining a mixture of a copper precursor and amorphous ZrO2 at 350 °C, surface-dispersed Cu2+ species
([CuO4] square planes) were partly formed on amorphous
ZrO2. The Cu2+ species was reduced by H2 to form Cu0 nanoparticles (<5 nm). This paper
reports that using copper acetate monohydrate as a copper precursor
leads to the greater number of active sites (Cu0a-ZrO2 interfacial sites) compared with the other precursors.