在有序的金属间表面上固定单个原子的扭曲诱导的界面电荷转移增强了纯氧生产
Soumi Mondal1,2, Mohd Riyaz1,2, Debabrata Bagchi1,2
1New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, Karnataka 560064, India.
ACS nano
|November 13, 2023
概括
这项研究引入了一种新的催化剂,Co1-CoO-Pd2Ge,用于氧化演化反应 (OER). 催化剂的特点是氧化物层在基曼化核上,增强了OER活动和耐用性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 为氧化演化反应 (OER) 开发高效的电催化剂对于可再生能源技术至关重要.
- 金属间化合物具有独特的电子特性,可以用于催化.
研究的目的:
- 为了合成和表征一种新型催化剂,包括原子合金纳入Pd2Ge金属间晶格,用于OER.
- 阐明Pd2Ge核心上的氧化物 (CoO) 层在增强催化性能方面的操作形成和作用.
主要方法:
- 使用高分辨率传输电子显微镜,X射线光电子谱学和X射线吸收谱学合成同位置Pd2Ge和操作特征.
- 对OER活性和耐久性的电化学评估,包括对CoO层的选择性去除.
- 现场光谱技术 (XANES,EXAFS,Raman) 和密度函数理论 (DFT) 的计算,以了解反应机制和电子结构.
主要成果:
- 原子融入Pd2Ge促进了CoO表面层的操作生成,形成了Co1-CoO-Pd2Ge催化剂.
- 在OER条件下,CoO层转化为CoOOH,通过Pd2Ge核心促进增强的电荷传输.
- DFT计算和实验数据证实,Pd2Ge网格诱导了旋转密度,并改善了OER活动和耐用性.
结论:
- 金属间Pd2Ge核心在增强电荷传输,产生自旋密度以及提高CoOOH覆盖层的电化学耐用性和稳定性方面发挥着至关重要的作用.
- 合成的Co1-CoO-Pd2Ge催化剂对氧演化反应表现出有希望的性能.
更多相关视频
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
18.2K
10:52Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
12.8K
相关概念视频
02:58Crystal Field Theory - Octahedral Complexes
26.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.6K
01:06Interfacial Electrochemical Methods: Overview
256
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
256
02:32Bonding in Metals
47.4K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
47.4K
02:42Valence Bond Theory
8.6K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.6K
02:51Metal-Ligand Bonds
20.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.8K
01:27Biasing of Metal-Semiconductor Junctions
261
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
261