氢

Hydrogen is considered to be one of the most important resources for the energy transition as it can be used as a transport fuel but also energise industrial processes. However, there are still several obstacles, which inhibit the widespread application of hydrogen. One of them is that hydrogen is not easy to transport. A possible solution to this problem is to convert hydrogen into methanol because methanol can be transported and...

Cars running on hydrogen are one of the greatest hopes for achieving a cleaner environment. They are similar to electric vehicles because they also use an electric motor instead of an internal combustion engine. However, unlike electric vehicles they are able to produce their own electricity: in a fuel cell, hydrogen (H2) gas from the fuel tank combines with oxygen (O2) from the air to generate electricity while only water and heat are...

Aenert news. Invention analysisIntroduction 增加氢在现代能源中的使用是其向低碳能源生产和消费形式转型的先决条件。 氢的独特之处主要在于它既可以用作环保燃料，也可以用作能量存储介质。 然而，迄今为止，全球氢气生产一直以蒸汽甲烷重整（SMR）为主，这是最具成本竞争力的方法，但伴随着大量的二氧化碳排放和化石资源的消耗。 另一方面，由于生产氢气的成本较高，利用可再生能源产生的电力通过水电解（WE）制氢的环保技术尚未得到广泛应用。 根据生产工艺的不同，氢气获得了从灰色到绿色的附加颜色代码。 其他制氢方案也正在开发中，包括生物质气化、热化学水分解、SMR 与碳捕获和封存 (CCS) 的组合。 通过甲烷热解生产所谓的绿松石氢是该领域潜在有前途的技术之一。 该技术的主要优点是在不使用传统氧化剂的情况下将甲烷分解为氢气和固体碳。...

The ability of plants to convert sunlight, water and carbon dioxide into carbohydrates and oxygen has fascinated scientists for many years, serving as an inspiration to emulate nature and design similar processes to turn sunlight into sustainable fuels. These processes are summarised under the term artificial synthesis, including, for example, photocatalytic water splitting, and refer to systems which can capture and store the energy...

The World Energy Council recently published a series of working papers and reports on the global development of hydrogen and its role in the energy transition. The publications explore demand dynamics and price changes for hydrogen, as well as national strategies around the world to support the development of hydrogen technologies. Thanks to the ambition to achieve zero greenhouse gas emissions through clean energy sources, there has...

In the constant search for cleaner transportation and industry fuels as well as means of power generation, scientists have long been concerned with finding more eco-friendly ways to produce hydrogen as this energy source usually does not release CO2 emissions. Its generation, however, is responsible for a lot of pollution, since most of the production processes rely on fossil fuels as feedstock. Also, it needs to be transported to the...

Photoelectrochemical (PEC) water splitting uses sunlight and photoelectrochemical materials to produce hydrogen from water. These photoelectrochemical materials help to directly split water molecules into hydrogen and oxygen. The semiconductor materials used in the process are similar to those used in photovoltaic solar electricity generation. The difference is that the semiconductor is kept in a water-based electrolyte and sunlight...

Hydrogen is a commodity which is easily produced by means of electrolysis and transformed back into electricity using fuel cells. It can be generated almost anywhere with the help of renewable energy sources and also employed in private households to provide a reliable power supply. Moreover, hydrogen is a suitable storage medium for solar and wind energy. Its advantage over common batteries is its improved storage density as well as...

Nowadays, hydrogen fuel is often produced from substances where hydrogen is only one component among other elements. Some of the substances hydrogen is obtained from, like methane, have the drawback of being harmful to the environment. To separate hydrogen from water, the oxygen evolution reaction (OER) can be used. OER generates molecular oxygen through a limiting chemical reaction, such as oxidation of water during oxygenic...

Hydrogen is a very useful commodity as it can be used to produce agricultural fertilisers on an industrial scale as well as in fuel cells for transportation and power storage. Nowadays, most hydrogen is generated by means of Steam Methane Reforming (SMR), which has the drawback of releasing CO2 as a by-product. As the use of hydrogen is likely to increase even further until 2100, low-emission processes are needed to satisfy growing...