The effect of the support on the infrared spectra of carbon monoxide adsorbed on nickel oxides

O’Neill, C. E.; Yates, David J.

doi:10.1016/0371-1951(61)80031-3

Cited by 37 publications

(3 citation statements)

References 10 publications

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“…Surprisingly, although the results of H 2 -TPD and guaiacol hydrogenation have demonstrated more exposed Ni particle surface sites on the Ni-0.2Ba/TiO 2 -A-H400 catalyst compared to the Ni-0.2Sr/TiO 2 -A-H400 catalyst, no CO adsorption on Ni particle surface in the range of 1800–2100 cm –1 can be detected in the DRIFT spectroscopy (Figure B). Furthermore, several peaks in the range of 1300–1700 cm –1 are observed only on the Ni-0.2Ba/TiO 2 -A-H400 catalyst (Figure B), which can be assigned to formate or carbonate species on the surface. , The appearance of these peaks around 1300–1700 cm –1 and the absence of CO adsorption on the Ni particle surface in the range of 1800–2100 cm –1 are similar to the results reported for the Ni/TiO 2 -A catalyst doped with a large amount of Na, suggesting that CO adsorbed on the Ni particle surface was transformed to formate or carbonate species. The research on alkali-modified Pt/TiO 2 catalysts also reported that CO adsorbed on Pt can interact with hydroxyl species on the support to produce formate species .…”

Section: Resultssupporting

confidence: 81%

“…Furthermore, several peaks in the range of 1300−1700 cm −1 are observed only on the Ni-0.2Ba/ TiO 2 -A-H400 catalyst (Figure 2B), which can be assigned to formate or carbonate species on the surface. 35,36 The appearance of these peaks around 1300−1700 cm −1 and the absence of CO adsorption on the Ni particle surface in the range of 1800−2100 cm −1 are similar to the results reported for the Ni/TiO 2 -A catalyst doped with a large amount of Na, 13 suggesting that CO adsorbed on the Ni particle surface was transformed to formate or carbonate species. The research on alkali-modified Pt/TiO 2 catalysts also reported that CO adsorbed on Pt can interact with hydroxyl species on the support to produce formate species.…”

Section: Effects Of Modifications By Alkali and Alkalinesupporting

confidence: 84%

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Alteration of Hydrodeoxygenation Pathways of Ni/TiO₂-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Fang,

Du,

Zhang

et al. 2024

ACS Catal.

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For supported metal catalysts on reducible oxides, encapsulation of metal particles by the support due to strong metal−support interaction (SMSI) often occurs uncontrollably under hydrogen reduction and may adversely affect the catalytic performance of the catalysts. In this work, methods to finely regulate SMSI are developed and demonstrated in guaiacol hydrodeoxygenation to allow for the alteration of reaction pathways. Among alkali and alkaline earth metal ions as modifiers on the surface of Ni/anatase TiO 2 (TiO 2 -A), Ba ions, even at very low surface coverage, are found to have the greatest effect in suppressing the cross-migration between Ni and TiO 2 -A induced by SMSI. The product selectivity in guaiacol hydrodeoxygenation shifts from phenolics on Ni/TiO 2 -A to cyclohexane/cyclohexanol on Ni−Ba/TiO 2 -A due to the effects of Ba ion modification on SMSI and the surface acidity of the Ni/TiO 2 -A catalyst. Characterizations using high-resolution transmission electron microscopy, pulsed CO adsorption, and the catalytic pathways illustrate that the exposed surface area of Ni particles is sensibly controlled by adjusting the Ba loading in a narrow range. High-angle annular dark field scanning transmission electron microscopy, in situ X-ray photoelectron spectroscopy, and theoretical calculation reveal the strong interaction between atomically dispersed Ba species and TiO 2 -A on the Ni−Ba/TiO 2 -A catalysts.

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Section: Resultssupporting

confidence: 81%

Section: Effects Of Modifications By Alkali and Alkalinesupporting

confidence: 84%

Alteration of Hydrodeoxygenation Pathways of Ni/TiO₂-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Fang,

Du,

Zhang

et al. 2024

ACS Catal.

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“…The complete vibrational spectrum of an adsorbate can give Information on the adsorption site, 2 the structure 3 and…”

mentioning

confidence: 99%

Vibrational spectra of carbon monoxide chemisorbed on alumina-supported nickel particles: A tunneling spectroscopy study

Kroeker

Kaska

Hansma

1981

The Journal of Chemical Physics

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Tunneling spectroscopy is used to study the chemisorption of CO on small nickel particles. The particles are grown from vapor on a thermally oxidized aluminum substrate. Carbon monoxide is observed to chemisorb in at least four distinct ways, giving CO stretching frequencies of 256.5, 246, 222, and 207 meV. The 256.5 meV species has low frequency modes at 45.5 and 59.5 meV. The low frequency modes of the remaining three species are not resolved sufficiently for identification. The frequencies of all modes were found to have some coverage dependence. The largest shift is seen in a CO stretching vibration that moves from 200 to 207 meV with increasing coverage. The effect of hydrogen coadsorption is examined and evidence for the presence of oxygen on the particles is presented. The reaction of hydrogen with the CO chemisorbed on these nickel particles is found to produce very little surface hydrocarbon in contrast to results found previously for rhodium particles under similar conditions.

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Katalytische Reaktionsschritte an Nickeloxid vom Standpunkt der Randschichttheorie

Schlosser

Herzog

1967

Ber Bunsenges Phys Chem

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Es wird cine Interpretation des elektronischen Faktors von an NiO‐Katalysatoren verlaufenden Reaktionen vom Typ A + D → AD (CO‐Oxydation, H2‐Verbrennung) versucht.Es ergibt sich u.a., daß ionosorbierte Akzeptoren A (O2) mit als Gegenladung fungierenden Defektelektronen (Ni3+‐Oberflächenionen) assoziiert sind und die Gleichgewichtsbelegung an Akzeptoren dotierungsunabhängig ist. Die Abnahme der Chemisorptionswärme mit steigender Bedeckung wird mit der gegenseitigen elektrostatischen Abstoßung der Chemisorptionskomplexe in Beziehung gebracht, womit die geringe Druckabhängigkeit der Akzeptorbelegung verständlich wird. Ionosorbierte Donatoren D (CO, H2) sind mit als Gegenladung fungierenden Elektronen (Ni+‐Oberflächenionen) assoziiert. Die Chemisorptionsgeschwindigkeit von Donatoren sollte mit steigender Defektelektronenkonzentration des Katalysators zunehmen. Die relativ schwache Dotierungsabhängigkeit der Geschwindigkeit der hier behandelten Reaktionen wird auf einen Mechanismus zurückgeführt, bei dem die Reaktion chemisorbierter A‐Ionen mit in unmittelbarer Nähe derselben auf die Katalysatoroberfläche treffenden gasförmigen D‐Molekülen unter gleichzeitiger Übernahme der mit den A‐Ionen assoziierten Defektelektronen zu diesen D‐Molekülen geschwindigkeitsbestimmend ist.

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The effect of the support on the infrared spectra of carbon monoxide adsorbed on nickel oxides

Cited by 37 publications

References 10 publications

Alteration of Hydrodeoxygenation Pathways of Ni/TiO₂-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Alteration of Hydrodeoxygenation Pathways of Ni/TiO₂-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Vibrational spectra of carbon monoxide chemisorbed on alumina-supported nickel particles: A tunneling spectroscopy study

Katalytische Reaktionsschritte an Nickeloxid vom Standpunkt der Randschichttheorie

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The effect of the support on the infrared spectra of carbon monoxide adsorbed on nickel oxides

Cited by 37 publications

References 10 publications

Alteration of Hydrodeoxygenation Pathways of Ni/TiO2-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Alteration of Hydrodeoxygenation Pathways of Ni/TiO2-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Vibrational spectra of carbon monoxide chemisorbed on alumina-supported nickel particles: A tunneling spectroscopy study

Katalytische Reaktionsschritte an Nickeloxid vom Standpunkt der Randschichttheorie

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Alteration of Hydrodeoxygenation Pathways of Ni/TiO₂-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity

Alteration of Hydrodeoxygenation Pathways of Ni/TiO₂-A Catalyst through Controlled Regulation of Strong Metal–Support Interactions and Surface Acidity