世界真奇妙 on MSN
构建Pt纳米粒子 - Mn单原子对，显著增强ORR反应活性
在质子交换膜燃料电池(PEMFC)中，Pt是氧还原反应(ORR)活性最高的材料。然而，贵金属Pt储量稀少和价格昂贵，减少材料中Pt含量是减少其使用的最直接的策略，但这通常伴随着活性位点数量的减少或发生团聚。Pt与其他后过渡金属合金化提高了Pt的活性， ...
世界真奇妙 on MSN
构建氧配位Co单原子电催化剂，促进尿素和过氧化尿素生产
过氧化尿素(CO(NH2)2•H2O2)作为尿素的衍生物，已广泛应用于制药、农业、纺纱、日常化工等。CO(NH2)2•H2O2的工业生产主要依赖于尿素和H2O2这两种反应物。其中，通过碳源(CO2)和氮源(N2、NO、NO2−、NO3−)耦合高效电催化剂，可以在电化学条件下通过电催化C-N偶联反应有效地生成尿素。同时，利用高效电催化剂和活性OOH中间体的适当 ...
世界真奇妙 on MSN
pH-电场耦合理论提供单原子酸/碱ORR新认识
金属-氮-碳（M-N-C）单原子催化剂被认为是高效的铂基催化剂替代品。过去，单原子催化剂在不同pH环境下的活性和选择性机制存在争议。本研究通过分析超过100种M-N-C结构，成功开发了单原子催化剂的pH-电场耦合新模型。该模型揭示了氧还原反应（ORR ...
当人类还在为碳捕集的能耗难题焦头烂额时，中国科学家已经跳过了“先捕集再转化”的传统流程——直接从空气中“抓”出二氧化碳，让它在阳光下变成能溶于水的尿素。这不是实验室里的偶然数据，而是能在开放空气里稳定运行的“碳转化生产线”：利用卟啉铟金属-有机框架（In-MOF）的“空间分区”智慧，让氧气从抑制剂变成助推器；通过异质结的“双重富集”效应，让浓度仅420ppm的大气CO2主动“聚集”到催化位点；最终 ...
Read on to find other ways you can save on your phone bill THE deadline for millions of O2 customers to avoid an annual £30 bill hike is fast approaching. The mobile phone provider warned that new and ...
In most cases, hydrogen peroxide can be used safely in the ear to soften earwax and make it easier to remove. However, don't use it if you have a perforated eardrum or ear tubes, because it can cause ...
As a kid, you probably remember the brown bottle your parents pulled out every time you skinned your knee. A little dab of hydrogen peroxide made things better. Hydrogen peroxide is used as an ...
Earwax (cerumen) protects the inside of your ears from irritation and infection. As the body makes new wax, the old earwax usually drains out of your ears naturally. Sometimes earwax can build up and ...
Hydrogen peroxide is a medicine cabinet staple that can treat wounds and disinfect your home. It kills bacteria, viruses, and mold spores and can cut through grease and remove stains. Use hydrogen ...
Arkadia Space's DARK propulsion system, using hydrogen peroxide propellant, was flown on a D-Orbit ION vehicle launched in March. Credit: Arkadia Space WASHINGTON — Spanish startup Arkadia Space has ...
The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...
Hydrogen peroxide is a common ingredient in over-the-counter teeth whitening products and in-office dental teeth whitening treatments. You can make a teeth whitening rinse or paste at home using a 3% ...
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