高性能Rh2P电催化剂用于高效的水分离
Haohong Duan1,2, Dongguo Li3, Yan Tang4
1Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University , Beijing 100084, China.
Journal of the American Chemical Society
|March 28, 2017
概括
研究人员开发了一种新型化纳米立方体催化剂 (Rh2P/C),用于高效的水分离. 这种具有成本效益的电催化剂在和氧进化反应方面表现出卓越的性能, 推动了清洁能源技术的发展.
科学领域:
- 材料科学
- 电化学
- 可再生能源
背景情况:
- 在非化石燃料能源技术中,开发高效的电催化剂对水分离至关重要.
- 需要活性,稳定和成本高效的催化剂来生产.
研究的目的:
- 合成和描述一种具有较低金属负载的新型酸电催化剂 (Rh2P/C).
- 评估Rh2P/C对演化反应 (HER) 和氧演化反应 (OER) 的性能.
主要方法:
- 在高表面积碳中分散的酸纳米立方体 (NC) 的易于溶热合成.
- 环状暗场扫描传输电子显微镜 (ADF-STEM) 用于原子结构的确定.
- 实验和计算研究以了解催化剂的特性.
主要成果:
- 合成的Rh2P/ CNC对HER和OER都表现出显著的表现.
- 性能超过了传统的Rh/C和碳 (Pt/C) 催化剂.
- 原子结构分析揭示了NC上富含的最外层原子层.
结论:
- 表面对于Rh2P强大的催化性能至关重要.
- 开发的Rh2P/C催化剂为高效的水分解和生产提供了有希望的替代方案.
相关概念视频
The Z-Scheme of Electron Transport in Photosynthesis
14.5K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
14.5K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
4.0K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
4.0K
Photosystem II
79.4K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
79.4K


