为高效的电催化进化提供超小型碳化纳米颗粒的化路径
Yan-Tong Xu1, Xiaofen Xiao2, Zi-Ming Ye1
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, China.
Journal of the American Chemical Society
|April 6, 2017
概括
使用锁策略合成的超小碳化物纳米集群对进化反应表现出色. 这种方法为清洁能源应用提供了稳定高效的电催化剂.
科学领域:
- 材料科学
- 纳米技术
- 电化学
背景情况:
- 对超小金属催化剂的控制合成对于化学转化至关重要.
- 开发用于演化反应 (HER) 的高效电催化剂是清洁能源技术的关键.
研究的目的:
- 开发超小碳化物纳米集群/纳米颗粒大小控制合成的战略.
- 评估这些纳米集群的电催化性能.
主要方法:
- 采用封闭式热解策略,使用热立体金属酸框架 (MAF-6) 封装前体 (W(CO) 6).
- 进行高温热解以形成大约2nm的碳化物纳米集/纳米颗粒.
主要成果:
- 合成的超小碳化物纳米集群/纳米粒子平均大小约为2nm.
- 在0.5M H2SO4中表现出优异的电催化活性,超电位低 (51 mV在10 mA cm-2) 和Tafel斜率 (每十年49 mV).
- 在/基催化剂中实现了最高的交换电流密度 (2.4 mA cm-2),以及卓越的稳定性和抗聚合性.
结论:
- 封闭式热解策略是生产超小碳化物纳米集群的有效方法.
- 这些纳米集群对演变反应具有出色的电催化性能和稳定性,使其成为未来能源应用的有希望的候选者.
更多相关视频
11:20An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
Published on: August 30, 2017
6.8K
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
17.5K
相关概念视频
Reduction of Alkenes: Catalytic Hydrogenation
12.4K
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...
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...
12.4K
Heterogeneous Catalysis
141
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
141
