Direct Visualization of the Formation about Inverse Catalyst CoO<sub>(<i>x</i>)</sub>/Pt(111)

Chen, Ran; Zhang, Xixi; Mao, Xin; Tao, Chengfa; Lan, Huanshi; Liu, Hao; Cai, Zhaobing; Ji, Hongbing

doi:10.1021/acs.jpcc.3c06974

J. Phys. Chem. C

2023

DOI: 10.1021/acs.jpcc.3c06974

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Direct Visualization of the Formation about Inverse Catalyst CoO_(x)/Pt(111)

Ran Chen,

Xixi Zhang,

Xin Mao

et al.

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2024

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Composition-Dependent Reconstructions of Titanium Oxide Clusters and Cu(111) Support via Cluster-Adatom Interactions

Wang,

Shi,

Tong

et al. 2024

J. Phys. Chem. C

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Mass-selected cluster deposition and scanning tunneling microscopy (STM) were used to investigate the surface structure and thermal stability of Ti 3 O y (y = 5, 6) clusters on a Cu(111) surface. STM imaging shows that the substoichiometric Ti 3 O 5 clusters aggregate into large dendritic assemblies at step edges, while the stoichiometric Ti 3 O 6 clusters are highly dispersed as single or small groupings of clusters. Cluster deposition also results in extensive reconstruction of the Cu(111) surface. The Ti 3 O 5 /Cu(111) surface exhibits one Cu-layer deep pits that are ringed by cluster assemblies that nucleate and grow at the perimeter step edges. By comparison, the Ti 3 O 6 /Cu(111) surface consists of irregular step edges and small one Cu-layer islands that are decorated with clusters. The restructuring of the Cu(111) surface is attributed to strong Cu-cluster interactions that release Cu adatoms from the step edges. This mechanism is supported by density functional theory (DFT) calculations, which predict that the Cu adatom attachment to the clusters is energetically favorable. Annealing the surfaces at elevated temperatures (400−700 K) results in higher densities of irregular steps, pits and isolated Cu islands as well as increased cluster aggregation. This work highlights adatom-cluster interactions as another manifestation of strong cluster-support interactions that can significantly alter the nature of the oxide-metal interface.

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Composition-Dependent Reconstructions of Titanium Oxide Clusters and Cu(111) Support via Cluster-Adatom Interactions

Wang,

Shi,

Tong

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

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Direct Visualization of the Formation about Inverse Catalyst CoO_(x)/Pt(111)

Cited by 1 publication

References 47 publications

Composition-Dependent Reconstructions of Titanium Oxide Clusters and Cu(111) Support via Cluster-Adatom Interactions

Composition-Dependent Reconstructions of Titanium Oxide Clusters and Cu(111) Support via Cluster-Adatom Interactions

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Direct Visualization of the Formation about Inverse Catalyst CoO(x)/Pt(111)

Cited by 1 publication

References 47 publications

Composition-Dependent Reconstructions of Titanium Oxide Clusters and Cu(111) Support via Cluster-Adatom Interactions

Composition-Dependent Reconstructions of Titanium Oxide Clusters and Cu(111) Support via Cluster-Adatom Interactions

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Direct Visualization of the Formation about Inverse Catalyst CoO_(x)/Pt(111)