(141b) Transition-Metal Oxides and Carbides As Electrocatalysts

We have studied electrochemical water splitting including both of its subreactions: the hydrogen evolution reaction (HER)¹ and the oxygen evolution reaction (OER).^2,3 Computationally we have identified a new highly active two-dimensional (2D) transition-metal carbide HER catalyst and transition-metal oxide OER catalysts that have been experimentally synthesized, characterized and tested.^1-3 The OER catalysts belong to the perovskite group of oxide materials or are oxides based on earth abundant elements.

1. Z. W. Seh, K. D. Fredrickson, B. Anasori, J. Kibsgaard, A. L. Strickler, M. R. Lukatskaya, Y. Gogotsi, T. F. Jaramillo, and A. Vojvodic, "Two-Dimensional Molybdenum Carbide (MXene) as an Efficient Electrocatalyst for Hydrogen Evolution", ACS Energy Letters 1, 589-594 (2016).
2. B. Zhang, X. Zheng, O. Voznyy, R. Comin, M. Bajdich, M. García-Melchor, J. Xu, M. Liu, F. P. García de Arquer, C. T. Dinh, F. Fan, M. Yuan, E. Yassitepe, A. Janmohamed, N. Chen, T. Regier, L. Han, H. L. Xin, L. Zheng, H. Yang, A. Vojvodic, and Edward H. Sargent, "Homogeneously-Dispersed Multi-Metal Oxygen-Evolving Catalysts", Science 352, 333-337 (2016).
3. L. C. Seitz, C. Dickens, K. Nishio, Y. Hikita, J. Montoya, A. Doyle, C. Kirk, A. Vojvodic, H. Y. Hwang, J. K. Nørskov, and T. F. Jaramillo, "A Highly Active and Stable SrIrO₃/IrO_x Catalyst for the Oxygen Evolution Reaction", Science 353, 1011-1014 (2016).