高度增强的氧化在双功能Ni上,通过合金定制用于节能生产的高能效生产
Yujun Zhao1, Yu Sun1, Haibo Li1
1School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, Liaocheng University, Liaocheng 252059, China.
本研究引入了一种新的RuNi合金催化剂,通过氧化反应 (HzOR) 和演化反应 (HER) 进行高效,节能的生产. 催化剂表现出优异的性能,与相美,并使使用燃料电池和太阳能发电实现实际的气发电.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 氧化演化反应 (OER) 对于生产来说是能源密集型的.
- 氨酸氧化反应 (HzOR) 为OER提供了一个低潜能的替代方案.
- 双功能电催化剂对于高效的演化反应 (HER) 和HzOR至关重要.
研究的目的:
- 为 HER 和 HzOR 开发一种负担得起且高活性的双功能电催化剂.
- 为了研究沉积在碳 (RuNi/C) 上的RuNi合金的催化性能.
- 用开发的催化剂来展示实际的,节能的生产.
主要方法:
- 通过共同减少方法合成RuNi/C.
- 对HER和HzOR性能进行电化学评估.
- 组装一个双电极电解器,并使用素燃料电池和太阳能电池板进行测试.
- 理论计算以了解催化机制.
主要成果:
- RuNi/C表现出极好的HER活性 (24mV为10mA cm−2) 和HzOR活性 (-65mV为10mA cm−2),超过了许多现有的催化剂.
- 电解器需要低工作电压 (57.8 mV在10 mA cm-2).
- 当由素燃料电池和太阳能电池板供电时,获得了显著的H2产量 (1.027和1.406 mmol h-1).
- 理论研究表明,在Ru合金Ni位点上改善了H2O解离和H*吸附.
结论:
- RuNi/C是一种高效的双功能电催化剂,用于节能生产气.
- 催化剂的性能和系统的实用性凸显了其在可再生气发电方面的潜力.
- 合金策略增强了HER和HzOR的催化活性和稳定性.
更多相关视频
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
06:32A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
相关概念视频
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
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...
Reduction of Alkenes: 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...
Catalysis
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
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.
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
