Pairwise semi-hydrogenation of alkyne to <i>cis</i>-alkene on platinum-tin intermetallic compounds

Pei, Yuchen; Chen, Minda; Zhong, Xiaoliang; Zhao, Tommy Yunpu; Ferrer, Maria-Jose; Maligal‐Ganesh, Raghu V.; Ma, Tao; Zhang, Biying; Qi, Zhiyuan; Zhou, Lin; Bowers, Clifford R.; Liu, Cong; Huang, Wenyu

doi:10.1039/d0nr00920b

Cited by 16 publications

(20 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In‐situ XRD patterns (Figure 1c and Figure S3) also identify the crystal structure of metal particles during reduction process. [ 35 ] All catalysts show the emergence of Pt and Pt 3 Sn peaks during the reduction. What's more, a small peak at ca .…”

Section: Resultsmentioning

confidence: 99%

Framework Zr Stabilized PtSn/Zr‐MCM‐41 as a Promising Catalyst for Non‐oxidative Ethane Dehydrogenation

Shi

Zhang

et al. 2022

Chin. J. Chem.

View full text Add to dashboard Cite

Comprehensive Summary Non‐oxidative ethane dehydrogenation is a promising route to produce ethene. Herein, PtSn supported catalysts were investigated to achieve better ethane dehydrogenation performance by introduction of different Zr promoters, i.e., framework Zr and ZrO2, to mesoporous MCM‐41. In‐situ XRD, TEM and CO chemisorption show that aggregation of metal particles and phase segregation of Pt3Sn to Pt and PtSn3 at high temperature occur for PtSn/M, leading to bad ethane dehydrogenation activity. Strong interaction between ZrO2 and PtSn species, as proved by XPS, results in restrained metal particles, which promotes the initial reactivity. However, Pt phase generated on surface is disadvantageous for the desorption of produced ethene as indicated by CO‐IR and C3H6‐TPD, and pyridine‐IR and NH3‐TPD indicate strong acidity generated. Both deactivate the catalyst rapidly by deep dehydrogenation and coking. Moderate interaction between PtSn species and Si‐O‐Zr with much weaker acidity is formed when framework Zr is incorporated into MCM‐41, which benefits the dispersion of metal particles, formation of Pt3Sn/Pt species and stabilization of metal species from phase segregation. Outstanding initial ethane conversion and ethene selectivity of ca. 99% were achieved for the optimal PtSn/ZrM, which is more coking‐tolerant and stable by generating graphitic carbon mainly on support instead of active metals.

show abstract

Section: Resultsmentioning

confidence: 99%

Framework Zr Stabilized PtSn/Zr‐MCM‐41 as a Promising Catalyst for Non‐oxidative Ethane Dehydrogenation

Shi

Zhang

et al. 2022

Chin. J. Chem.

View full text Add to dashboard Cite

show abstract

“…One promising type of catalyst on the way to SACs is bimetallic catalysts, in which the metal active in the hydrogenation is diluted with catalytically inert or less active atoms . Pd–Au, , Pd–Ag, Pd–In, and Pt–Sn catalysts were recently investigated in terms of PHIP; for Pt–Sn catalysts, a pairwise selectivity of 10.9% was observed, but the overall conversion was estimated only as 0.5% . The progress of catalyst design in the context of HET-PHIP is covered in recent reviews. , …”

Section: Introductionmentioning

confidence: 99%

Pd on Nanodiamond/Graphene in Hydrogenation of Propyne with Parahydrogen

et al. 2021

View full text Add to dashboard Cite

The catalytic behavior of Pd catalysts supported on a defective nanodiamond/graphene material (ND@G) was studied in propyne hydrogenation with parahydrogen, taking advantage of the possibility to control the character of metal distribution by changing metal loading. Two different catalysts were studied in this work: Pd 1 /ND@G with a monoatomic Pd distribution (0.11 wt %) and Pd n /ND@G comprising supported metal clusters (0.87 wt %). The monoatomic distribution of Pd in Pd 1 /ND@G was confirmed by XPS and HAADF-STEM methods. This catalyst demonstrated an outstanding selectivity to propene (up to 100%) in propyne hydrogenation. The activity of the two Pd catalysts in pairwise H 2 addition to propyne was compared under the same experimental conditions by observing 1 H NMR signal enhancements provided by the parahydrogen-induced polarization (PHIP) effect. The enhancements produced by the Pd 1 /ND@G catalyst were found to be ca. 6-fold larger than those observed with Pd n /ND@G, indicating that the character of metal distribution has important consequences for the performance of a catalyst and its efficiency in terms of PHIP effects.

show abstract

“…Furthermore, this work establishes precedent to investigate other isoelectronic Zintl phase catalysts, including those that contain Al. This discovery that this family of materials universally catalyzes alkyne hydrogenation paves the way for future surface science studies on the origin of catalytic behavior in these compounds, as well as expansion of the reaction and substrate scope, 36 and optimization of long-term catalytic performance.…”

Section: Discussionmentioning

confidence: 95%

Alkyne Hydrogenation Catalysis across a Family of Ga/In Layered Zintl Phases

Goldberger

2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Transition-metal-free Zintl–Klemm phases have received little attention as heterogeneous catalysis. Here, we show that a large family of structurally and electronically similar layered Zintl–Klemm phases built from honeycomb layers of group 13 triel (Tr) or group 14 tetrel (Tt) networks separated by electropositive cations (A) and having a stoichiometry of ATr2 or ATrTt (A = Ca, Ba, Y, La, Eu; Tr = Ga, In; Tt = Si, Ge) exhibit varying degrees of activity for the hydrogenation of phenylacetylene to styrene and ethylbenzene at 51 bar H2 and 40–100 °C across a variety of solvents. The most active catalysts contain Ga with, formally, a half-filled p z orbital, and minimal bonding between neighboring Tr2 or TrTt layers. A 13-layer trigonal polytype of CaGaGe (13T-CaGaGe) was the most active, cyclable, and robust catalyst and under modest conditions (1 atm H2, 40 °C) had a surface specific activity (590 h–1) comparable to a commercial Lindlar’s catalyst. Additionally, 13T-CaGaGe maintained 100% conversion of phenylacetylene to styrene at 51 bar H2, even after 5 months of air exposure. This work reveals the structural design elements that lead to particularly high catalytic activity in Zintl–Klemm phases, further establishing them as a promising materials platform for hydrogen-based heterogeneous catalysis.

show abstract

Pairwise semi-hydrogenation of alkyne to cis-alkene on platinum-tin intermetallic compounds

Abstract: Intermetallic PtSn nanoparticles leads to pairwise-hydrogenation of alkynes to the corresponding cis-alkenes, satisfying both high stereoselectivity and high chemoselectivity.

Cited by 16 publications

References 31 publications

Framework Zr Stabilized PtSn/Zr‐MCM‐41 as a Promising Catalyst for Non‐oxidative Ethane Dehydrogenation

Framework Zr Stabilized PtSn/Zr‐MCM‐41 as a Promising Catalyst for Non‐oxidative Ethane Dehydrogenation

Pd on Nanodiamond/Graphene in Hydrogenation of Propyne with Parahydrogen

Alkyne Hydrogenation Catalysis across a Family of Ga/In Layered Zintl Phases

Contact Info

Product

Resources

About