相关实验视频

Updated: Jan 17, 2026

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

具有最佳 Pt⁰-Pt^δ+ 的二维子单层 Pt 集群,用于有效的甲基环合脱场所

Zhengjian Li¹, Mingzhi Wang¹, Huayue Yang¹

¹School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou 510006, China.

|September 22, 2025

概括

优化 (Pt) 催化剂在上使用二维子单层集群 (SLC) 显著增加甲基环素脱以储存. 与传统催化剂相比,这些Pt SLC表现出较高的多生产活性和选择性.

科学领域:

不同质的催化剂.
材料科学是一种材料科学.
气储存技术的技术

背景情况:

甲基环素脱 (MCHDH) 对于的储存和运输至关重要.
在MCHDH的Pt/Al2O3催化剂中的活性 (Pt) 位点的精确原子结构仍然不清楚.
要了解Pt位结构和C-H激活机制,需要进行亚纳米特征.

研究的目的:

阐明MCHDH最佳活性Pt位点的原子尺度结构.
为了研究Pt集群结构和催化性能之间的关系.
为MCHDH开发高活性和选择性催化剂.

主要方法:

综合的结构特征. 综合的结构特征.
密度函数理论 (DFT) 的计算.
具有不同结构的Pt催化剂的催化性能测试 (2D SLC,单个原子,纳米粒子).

主要成果:

确定了最优的活性位点,即与γ-Al2O3.3接口的2D亚单层集群 (SLC).
证明了Ptδ+与Pt0的适当比率形成了优越的Pt0-Ptδ+接口部位.
使用 Pt 2D SLC 实现了 29,353 mmol gPt-1 min-1 的反应速率,使用 Pt 2D SLC 实现了 99.98% 的多烯选择性,性能优于 Pt 单个原子和纳米粒子.

结论:

具有最佳 Pt0-Ptδ+ 接口的原子级 2D Pt SLC 显著增强了 MCHDH 活动和选择性.
电子特性 (5d电子主导) 和接口位点促进了顺序的C-H键激活和二烯脱吸.
构建二维子单层金属集群是设计用于选择性C-H激活的高效催化剂的有希望的策略.

关键词:

在Pt/Al2O3催化剂中.固定床热催化剂的热催化.接口催化剂的作用.甲基环合脱的方法最优的 Pt0Ptδ+ 接口位点两个维的子单层 Pt 集群.

更多相关视频

Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

Published on: August 17, 2019

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

相关概念视频

π Molecular Orbitals of 1,3-Butadiene

π Molecular Orbitals of 1,3-Butadiene

Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...

Stability of Substituted Cyclohexanes

Stability of Substituted Cyclohexanes

This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Stability of Conjugated Dienes

Stability of Conjugated Dienes

Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...