THE DECOMPOSITION OF AMMONIA ON THE FLAT (111) AND STEPPED (557) PLATINUM CRYSTAL SURFACES

Journal Article · Fri Feb 01 00:00:00 EST 1980 · Surface Science

DOI:https://doi.org/10.1016/0039-6028(81)90496-9· OSTI ID:1064006

Guthrie, W L; Sokol, J D; Somorjai, G A

Ammonia adsorption, desorption and decomposition to H{sub 2} and N{sub 2} has been studied on the flat (111) and stepped (557) single crystal faces of platinum using molecular beam surface scattering techniques. Both surfaces show significant adsorption with sticking coefficients on the order of unity. The stepped (557) surface is 16 times more reactive for decomposition of ammonia to N{sub 2} and H{sub 2} than the flat (111) surface. Kinetic parameters have been determined for the ammonia desorption process from the Pt(111) surface. The mechanism of ammonia decomposition on the (557) face of platinum has been investigated.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Materials Sciences Division
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 1064006
• Report Number(s): LBL-10536
• Journal Information: Surface Science, Vol. 109, Issue 2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY