Etching of the intermetallic compounds PdGa and Pd3Ga7: An effective way to i…

Abstract. The structurally ordered intermetallic compounds PdGa and Pd3Ga7 constitute highly selective catalysts for the selective semi-hydrogenation of acetylene. The milling of as-synthesized samples, followed by etching with ammonia solution increased the activity of the catalysts by factor of 60. Chemically etched samples possess high activity and simultaneously keep their high selectiv…