FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3159367077> ?p ?o ?g. }

• W3159367077 endingPage "8619" @default.
• W3159367077 startingPage "8606" @default.
• W3159367077 abstract "Infrared spectra have been widely used to study CO adsorption and reaction on Au surfaces to reveal the underlying reaction mechanism. However, the results and interpretation of IR spectra of CO adsorption on Au surfaces remain highly controversial, which prevents reliable conclusions from earlier studies. Herein, we studied CO adsorption on Au thin films and nanoparticles by in situ polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) with highly purified CO. Only a single CO adsorption feature above 2100 cm–1 is observed on Au nanoparticles and thin films with CO adsorption pressure varying from 1 × 10–6 to 100 Torr. This observation contradicts the general findings that CO adsorption on Au surfaces at elevated CO pressures shows strong adsorption bands at 2090–1900 cm–1 mostly assigned to CO bound to negatively charged Au. We rule out the contradiction is caused by the pressure gap between vacuum and elevated pressure conditions employed for CO adsorption. We provide clear evidence that the CO adsorption bands in the region of 2090–1900 cm–1, widely observed in earlier studies of high-pressure CO adsorption on Au surfaces, are actually caused by Ni-carbonyl (Ni(CO)4) contamination from incompletely purified CO gas rather than CO adsorption on negatively charged Au. Ni-carbonyl can be adsorbed and decomposed on Au surfaces, resulting in the formation of NiAu bimetallic alloys. We further investigate CO adsorption behaviors on bimetallic NiAu thin films and nanoparticles by in situ PM-IRRAS. We find that Au is enriched on the NiAu surface under vacuum conditions, while Ni is segregated on the surface under elevated CO pressure conditions. The strong CO adsorption on Ni sites on NiAu bimetallic surfaces leads to an atop CO adsorption band at 2090–2040 cm–1, while CO bound on Au sites yields an adsorption band above 2100 cm–1. Our study clearly clarifies the origin of the widely reported CO adsorption bands at 2090–1900 cm–1 and resolves the puzzle of IR spectra of CO on Au surfaces, thus providing an important paradigm that complete purification of CO gas is a prerequisite for any in situ studies associated with CO at elevated pressures." @default.
• W3159367077 created "2021-05-10" @default.
• W3159367077 creator A5012324763 @default.
• W3159367077 creator A5018341906 @default.
• W3159367077 creator A5025001356 @default.
• W3159367077 creator A5034504744 @default.
• W3159367077 creator A5037117751 @default.
• W3159367077 creator A5076740203 @default.
• W3159367077 date "2021-04-21" @default.
• W3159367077 modified "2023-09-26" @default.
• W3159367077 title "In Situ PM-IRRAS Study of CO Adsorption on Au Surfaces: Solving the Puzzle" @default.
• W3159367077 cites W1734743771 @default.
• W3159367077 cites W1964029633 @default.
• W3159367077 cites W1964525295 @default.
• W3159367077 cites W1965921484 @default.
• W3159367077 cites W1967148464 @default.
• W3159367077 cites W1968089506 @default.
• W3159367077 cites W1973878961 @default.
• W3159367077 cites W1976630507 @default.
• W3159367077 cites W1981969216 @default.
• W3159367077 cites W1982766272 @default.
• W3159367077 cites W1983853055 @default.
• W3159367077 cites W1991912692 @default.
• W3159367077 cites W1992277893 @default.
• W3159367077 cites W1994259651 @default.
• W3159367077 cites W1998973717 @default.
• W3159367077 cites W2001781236 @default.
• W3159367077 cites W2005647954 @default.
• W3159367077 cites W2006493442 @default.
• W3159367077 cites W2007986500 @default.
• W3159367077 cites W2008358595 @default.
• W3159367077 cites W2011718954 @default.
• W3159367077 cites W2016632908 @default.
• W3159367077 cites W2016889766 @default.
• W3159367077 cites W2019555602 @default.
• W3159367077 cites W2026337978 @default.
• W3159367077 cites W2027605970 @default.
• W3159367077 cites W2030514198 @default.
• W3159367077 cites W2033412312 @default.
• W3159367077 cites W2033830521 @default.
• W3159367077 cites W2034140140 @default.
• W3159367077 cites W2041954403 @default.
• W3159367077 cites W2042298076 @default.
• W3159367077 cites W2046180172 @default.
• W3159367077 cites W2047808299 @default.
• W3159367077 cites W2048470012 @default.
• W3159367077 cites W2055913392 @default.
• W3159367077 cites W2056955205 @default.
• W3159367077 cites W2058379883 @default.
• W3159367077 cites W2060216992 @default.
• W3159367077 cites W2062242415 @default.
• W3159367077 cites W2067746562 @default.
• W3159367077 cites W2068541605 @default.
• W3159367077 cites W2070805715 @default.
• W3159367077 cites W2072276072 @default.
• W3159367077 cites W2073233944 @default.
• W3159367077 cites W2077991181 @default.
• W3159367077 cites W2079326758 @default.
• W3159367077 cites W2080779623 @default.
• W3159367077 cites W2086177693 @default.
• W3159367077 cites W2097866460 @default.
• W3159367077 cites W2100460025 @default.
• W3159367077 cites W2102650598 @default.
• W3159367077 cites W2103943038 @default.
• W3159367077 cites W2114707580 @default.
• W3159367077 cites W2115220647 @default.
• W3159367077 cites W2122075752 @default.
• W3159367077 cites W2124278371 @default.
• W3159367077 cites W2128055736 @default.
• W3159367077 cites W2143164233 @default.
• W3159367077 cites W2143195199 @default.
• W3159367077 cites W2145413612 @default.
• W3159367077 cites W2145931541 @default.
• W3159367077 cites W2148867049 @default.
• W3159367077 cites W2150155274 @default.
• W3159367077 cites W2163623291 @default.
• W3159367077 cites W2172161005 @default.
• W3159367077 cites W2312616235 @default.
• W3159367077 cites W2325265986 @default.
• W3159367077 cites W2325632367 @default.
• W3159367077 cites W2397248151 @default.
• W3159367077 cites W2518301085 @default.
• W3159367077 cites W2547469692 @default.
• W3159367077 cites W2753220778 @default.
• W3159367077 cites W2762144611 @default.
• W3159367077 cites W2922107201 @default.
• W3159367077 cites W2999284056 @default.
• W3159367077 cites W3007814922 @default.
• W3159367077 cites W3086927212 @default.
• W3159367077 cites W3103332791 @default.
• W3159367077 cites W3108759219 @default.
• W3159367077 cites W4206476512 @default.
• W3159367077 cites W4211164327 @default.
• W3159367077 cites W4253039568 @default.
• W3159367077 doi "https://doi.org/10.1021/acs.jpcc.1c01638" @default.
• W3159367077 hasPublicationYear "2021" @default.
• W3159367077 type Work @default.
• W3159367077 sameAs 3159367077 @default.

• next