Operando Unveiling of Hydrogen Spillover Mechanisms on Tungsten Oxide Surfaces

Hydrogen spillover is an important process in catalytic hydrogenation reactions, facilitating H2 activation and modulating surface chemistry of reducible oxide catalysts. This study focuses on the operando unveiling of platinum-induced hydrogen spillover on monoclinic tungsten trioxide (γ-WO3), employing ambient pressure X-ray photoelectron spectroscopy, density functional theory calculations and microkinetic modeling to investigate the dynamic evolution of surface states at varied temperatures. At room temperature, hydrogen spillover results in the formation of W5+ and hydrogen intermediates (hydroxyl species and adsorbed water), facilitated by Pt metal clusters. With increasing temperature, water desorption,…

• NS
  National Science Foundation

  Awards: 2117681, OAC-2117681, DE-SC0023465
• UD
  U.S. Department of Energy

  Awards: DE-SC0023465, DE-AC02, DE-AC02-
• UO
  University of Pittsburgh

  Awards: OAC-2117681, SCR_022735
• OO
  Office of Science

  Award: DE-AC02
• BE
  Basic Energy Sciences

  Awards: DE-AC02, DE-AC02-0511231, DE-SC0023465