02063nas a2200205   4500008004100000022001400041245010300055210006900158260000800227300001100235490000800246520139700254653000801651653000901659653002501668653000801693100001801701700001801719856012001737       2022                        eng d  a0169-433200aFrom molecular adsorption to decomposition of methanol on various ZnO facets: a periodic DFT study0 aFrom molecular adsorption to decomposition of methanol on variou  cNOV  a1541500 v6023 a<p>
	Methanol is an interesting and important molecule to study because of its potential to replace existing fuels. It is also a prominent hydrogen source which can be used to generate hydrogen in-situ. ZnO is widely used as catalyst in synthesis of methanol from CO2 at industrial scale. In this work, we demonstrate that the same catalyst could be used for MeOH decomposition. We have investigated interaction of methanol with various flat and stepped facets of ZnO by employing Density Functional Theory (DFT). Two flat [(10(1)overbar 0) and (11(2)overbar 0)] and two stepped [(10(1)overbar 3) and (11(2)overbar 2)] facets are studied in detail for methanol adsorption. Chemisorption of MeOH with varying strength is common to all four facets. Most importantly spontaneous dissociation of O-H bond of methanol is observed on all facets except (11(2)overbar 0). Our DFT calculations reveal that molecular adsorption is favored on flat facets, while dissociation is favored on step facets. Also, (10(1)overbar 0) facet undergoes substantial reconstruction upon MeOH adsorption. Activation of C-H bond along with strengthening of C-O bond on ZnO facets suggest partial oxidation of methanol. With our DFT investigations, we dig deeper into the underlying electronic structure of various facets of ZnO and provide rationale for the observed facet dependent interaction of ZnO with MeOH.</p>
10aDFT10aMeOH10aSurface interactions10aZnO1 aMehta, Shweta1 aJoshi, Kavita  uhttp://library.ncl.res.in/content/molecular-adsorption-decomposition-methanol-various-zno-facets-periodic-dft-study