The presence of triphenylphosphine ligand inhibits the agglomeration of gold particles during acetylene hydrochlorination, thereby improving the catalytic performance of the Au-based catalyst.

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TiO 2 was doped into Er 2 O 3 -stabilized ZrO 2 (ErSZ) to obtain desirable properties for thermal barrier coating (TBC) applications. The phase composition, thermal conductivity, and mechanical properties of TiO 2 -doped ErSZ were investigated. ErSZ had a non-transformable metastable tetragonal (t ) phase, the compound with 5 mol % TiO 2 consisted of t and cubic (c) phases, while 10 mol % TiO 2 doped ErSZ had t , c, and about 3.5 mol % monoclinic (m) phases. Higher TiO 2 doping contents caused more m phase, and the compounds were composed of t and m phases. When the dopant content was below 10 mol %, TiO 2 doping could decrease the thermal conductivity and enhance the toughness of the compounds. At higher doping levels, the compounds exhibited an increased thermal conductivity and a reduction in the toughness, mainly attribable to the formation of the undesirable m phase. Hence, 10 mol % TiO 2 -doped ErSZ could be a promising candidate for TBC applications.

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