Fig. 3

TEM and HRTEM images of the catalysts. HRTEM images of CuAlOx (a); CuAlOx + DIMCARB + Phen + CO2 + H2 (c); CuAlOx + Phen + H2 (8 h) (d); CuAlOx + Phen + H2 (16 h) (e); CuAlOx + Phen + H2 (24 h) (f); and TEM image of CuAlOx + DIMCARB + Phen + CO2 + H2 (b). c is a magnified picture of a region from b. The scale bar of a, c, d, e, f is 5 nm; b is 10 nm