直接合成的氧化作为一个氧气进化催化剂在质子交换膜水电解器中
Jinzhen Huang1, Zheyu Zhang2, Chiara Spezzati3
1PSI Center for Energy and Environmental Sciences, PSI, Villigen, Switzerland. jinzhen.huang@psi.ch.
Nature communications
|August 13, 2025
概括
氧化 (CoOOH) 显示出对氧气演化反应的pH依赖活性,这对于水电解剂至关重要. 这种催化剂提供了稳定的性能,促进了绿色的生产.
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
- 催化剂是一种催化剂.
背景情况:
- 质子交换膜水电解器是绿色生产的关键,但因催化剂的可用性而受到限制.
- 基于的催化剂是有希望的,但需要将表面重建为类似活性氧化 (CoOOH) 的结构.
- 直接合成的CoOOH在酸性环境中的行为,对于电解剂至关重要,仍未得到充分研究.
研究的目的:
- 在广泛的pH范围内研究氧化 (CoOOH) 的电化学活性和特性.
- 阐明由CoOOH催化氧进化反应的pH依赖机制.
- 评估 CoOOH 在质子交换膜水电解器中的长期稳定性和性能.
主要方法:
- 运行硬X射线吸收光谱检测氧化状态的pH诱导变化.
- 在各种pH条件下进行电催化性能测试.
- 动态同位素效应,明显激活能测量和理论计算以确定反应机制.
主要成果:
- 氧化 (CoOOH) 在整个pH范围内表现出氧化演变反应的活性,具有pH依赖的氧化还原特性.
- 操作的X射线吸收光谱显示了氧化开始的pH诱导的变化,而没有改变氧化还原活性物种的覆盖范围.
- 催化剂在质子交换膜水电解器中在100 mA cm-2下稳定运行400小时.
结论:
- CoOOH的催化性能与受pH影响的界面氧化转换密切相关.
- 建议对COOOH的氧气进化反应途径进行详细的机制理解.
- 由于其稳定性和广泛的pH活性,氧化在水电解中的实际应用具有显著的潜力.
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
3.7K
10:21Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
8.5K
相关概念视频
03:00Electrolysis
27.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
27.3K
02:47Voltaic/Galvanic Cells
58.4K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
58.4K
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
13.0K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
13.0K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.8K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.8K