(316c) The Curious Redox Behavior of Supported Pd – a Review of Current Understanding

Redox properties of Pd dispersed on refractory supports such as alumina have captured the attention of researchers ever since the work of Farrauto and co-workers [1] in the early 1990s that pointed out two curious features : 1) decomposition of PdO in two steps with increasing temperature, and 2) a pronounced temperature hysteresis in PdO decomposition and re-formation. This presentation summarizes the current state of understanding of both phenomena, and particularly focuses on insights regarding the two-step PdO decomposition obtained from the Datye group at the University of New Mexico [2] and a collaboration between researchers at the University of Michigan and Ford Motor Company [3].

1. R.J. Farrauto, M.C. Hobson, T. Kennelly, E.M. Waterman, Appl. Catal. A: Gen. 81 (1992)

227-237.

2. A.K. Datye, J. Bravo, T.R. Nelson, P. Atanasova, M. Lyubovsky, L. Pfefferle, Appl. Catal.

A: Gen. 198 (2000) 179-196.

3. X. Chen, J.W. Schwank, G.B. Fisher, Y. Cheng, M. Jagner, R.W. McCabe, M.B. Katz, G.W. Graham, and X. Pan, Appl. Catal. A: Gen. 475 (2014) 420.