The state of platinum in the potassium platinum-11-tungstosilicate system on alumina studied by diffuse-reflectance IR spectroscopy

Korovchenko, P. A.; Vladimirov, N. A.; Gazarov, R. A.; Kustov, L. М.

doi:10.1023/b:rucb.0000012358.58253.0b

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…8,9 In addition, there are several papers dealing with different combinations of POMs and Pt (mostly concentrated on catalysis); however, the chemical nature of the resulting products remains unclear. [10][11][12] Here we report the synthesis and structural studies of the Pt(II)-containing dimeric POM complex [Pt 2 (W 5 O 18 ) 2 ] 8− , containing two lacunary Lindqvist isopoly fragments (Fig. 1) linked by two square planar Pt(II) centers.…”

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confidence: 99%

A Pt(ii) isopolytungstate: synthesis and crystal structure

et al. 2012

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A Pt(ii) isopolytungstate: synthesis and crystal structure

et al. 2012

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“…As shown in Figure a and Figure S15 in the Supporting Information, the reduction peak at 1.72 V is assigned to V with the absence of the Pt reduction peak, indicating the ability of V to obtain and lock electrons is stronger than that of Pt. While Pt in {PtMo 6 } obtains electrons first and then HER occurs in the electrochemical process . Similar to the redox behavior in {PtMo 6 }, the reductive peak potentials of {PtW 6 } are more positive than those of {PtMo 6 }, which means that Pt in {PtW 6 } is easier to obtain electrons than in {PtMo 6 }.…”

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confidence: 73%

“…Four single-atom Pt-containing POMs, Na 5 [H 3 PtW 6 O 24 ] ({PtW 6 }), K 4 [H 4 PtMo 6 O 24 ] ({PtMo 6 }), Na 5 [H 2 PtV 9 O 28 ] ({PtV 9 }), and [(C 3 H 9 ) 4 N] 4 [SiPtW 11 O 40 H 2 ] ({PtSiW 11 }), have been synthesized (Figure ) according to the reported methods, − and their polyoxoanion structures are shown in Figure a–d. {PtV 9 }, {PtMo 6 }, and {PtW 6 } all have a similar {Pt IV O 6 } octahedron surrounded by different {MO 6 } (M = V, Mo, W) octahedrons.…”

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Revealing Hydrogen Evolution Performance of Single-Atom Platinum Electrocatalyst with Polyoxometalate Molecular Models

Lang

Zhou

et al. 2021

ACS Energy Lett.

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Single-atom catalysts (SACs) have attracted much attention due to their outstanding catalytic activity and maximum atom utilization. However, the unclear structure of the atomic active site hinders deep understanding and wide applications of SACs. Herein, we select a series of single-atom platinum (Pt)-containing polyoxometalates with well-defined structures as molecular models to clarify the effects of metal–oxide support and coordination environment on the activity of single-atom Pt electrocatalyst for HER. In situ X-ray absorption spectroscopy and density function theory calculation reveal that metal–oxide supports affect the ability of atomic Pt site to obtain electrons, resulting in different effective potentials loaded on the Pt active center in HER. Meanwhile, the coordination environment of single-atom Pt determines the pathway of HER, which also leads to different HER performance. This work provides a feasible strategy to reveal the structure–activity relationship of SACs and design new high-efficiency SACs for electrocatalytic HER.

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“…Mixed heteropoly compounds (HPCs) with Keggin structure containing Ni and Co heteroatoms, which occupied the position of a tungsten atom in a W 3 O 13 fragment [9], were prepared according to the standard procedure [1,13]. Our samples were prepared by impregnating ZrO 2 -Al 2 O 3 double oxide or Al 2 O 3 with aqueous solutions of the corresponding HPCs [12,13]. IK-GO-…”

Section: Chemical Kinetics and Catalysismentioning

confidence: 99%

“…The synthesis of supported catalytic systems in which mixed heteropoly complexes containing Co, Ni, Pt, and any other transition metals in the inner coordination sphere (partially replacing W or Mo in the conventional Keggin structure) are used as active components, is a fundamentally new approach to obtaining highly dispersed metal particles on a support's surface. High dispersion of Pt and Pd in HPA/Al 2 O 3 supported systems (or preparations of atomically dispersed metal centers) was observed in [12,13].…”

Section: Introductionmentioning

confidence: 99%