firstly observed Teflon-supported Ru electrodes could selectively reduce CO 2 to CH 3OH with a low faradaic efficiency (FE) of 42%. Significant efforts towards selectively converting CO 2 into CH 3OH have been made since early 1983 over semiconductor materials (p-GaP and p-GaAs) with a low current density (<1 mA cm −2).
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However, the 6 e − process of CO 2 reduction to form CH 3OH over the full reaction is kinetically unfavorable. 16,17 The standard potential of CO 2 electroreduction to CH 3OH is only 0.016 V ( vs. 15 Besides, CH 3OH with high energy density can be stored as liquid under ambient conditions. 14 Moreover, the main product from noble metals is carbon monoxide (CO), which leads to the second pollution at the cost of CO 2 consumption.ĬH 3OH, as an ideal chemical, is an important intermediate of paint, plastics, and other common products. 5 Among them, Au, 6–9 Ag, 1,10,11 and Pd 12,13 have been explored comprehensively, while the expensive price limits the substantial application of noble metals in industry. Transition metals are commonly proposed in CO 2 reduction reaction (CO 2RR) because of their vacant orbits and active d electrons. 5 The complex products increase the challenges towards generating target product. As for the selectivity, in addition to the major side reaction hydrogen evolution reaction (HER), the direct electroreduction of CO 2 in aqueous solution is able to generate diversiform carbon-containing chemicals. 4,5 The high overpotential increases the consumption of energy and makes it difficult to achieve the sustainable transformation of CO 2. 1–3 However, the main defects of electroreduction CO 2 are the high overpotential required to drive the reaction, the low selectivity towards various products and the high cost of catalysts. Introduction Electrochemical reduction of CO 2 to carbon-containing fuels is a feasible process which is conducive to solving the serious environmental problems caused by excess CO 2 such as iceberg melting, sea level rise and coastal delta subsidence.
The active sites are located at the interface between FeS 2 and NiS which can effectively suppress the side reaction hydrogen evolution reaction and facilitate the CO 2 reduction reaction.
The high selectivity towards CO 2 electroreduction to CH 3OH may be attributed to the special ladder structure of the FeS 2/NiS nanocomposite. The FeS 2/NiS nanocomposite electrocatalyst exhibits a stable current density of 3.1 mA cm −2 over a 4 hour stability test. In this work, we introduce a FeS 2/NiS nanocomposite electrocatalyst synthesized by traditional hydrothermal method, which selectively reduces CO 2 to CH 3OH with an unprecedented overpotential of 280 mV and a high faradaic efficiency up to 64% at the potential of −0.6 V vs. Killing Metins and pick up everything. I'm sure everyone is familiar with the Metin. Some people see them as stinky rocks that are hard to kill, but to Money Makers like you and I, they are a treasure chest just waiting to be smashed open. Now, killing Metins is no easy task and you need the proper character for the job, a Mage is a poor choice to kill Metins with. Your best bet is to pick a Sura or a Warrior, preferably a Body Warrior or a Weapon Sura. They can grind through Metins fast, and if you have a Armored Horse, Metins beware. There are some very nice rewards you can gain from Metins, they drop Skill Books, Spirit Stones, Potions, and gear, all of these can earn you a lot of metin2 gold.Ĭollecting Horse Medals in dark metin2. Horse Medals are a great item to collect not only for selling, but also to save you money by using them yourself. In my experience, the best character for this job is a Mental Warrior with mastered Taichi, they can tank a large amount of Monkeys without dying for maximum grinding. I suggest a Mental Warrior level 25 or lower to kill Monkeys with, and I also suggest you buy Thief Gloves for this job to increase your drop rate. Just like Fishing, you need to be patient when collecting Horse Medals. Also, be sure to add your character to a farming guild to donate EXP, so you stay at the same level.Electrochemical reduction of carbon dioxide (CO 2) to methanol (CH 3OH) catalyzed by transition metals has been proved feasible and effective in aqueous electrolytes. When you start to play metin 2 mmo game, you will find that one of the hard things to do in game is making gold or yang. How to make metin 2 yang in this game? Maybe you had searched the methods in the internet, and you had known some. But here in this guide we are still want to share some good yang making tips or tricks to help you become rich in game more easily and quickly, the detail information is as the follow, have a look!
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