Plasma-regulated N-doped carbon nanotube arrays for efficient electrosynthesis of syngas with a wide CO/H2 ratio
Source abstract
Abstract
合成气是一种CO和H2的混合气, 是工业上生产烯烃、液体 燃料、聚合物、药物等产品的重要原料. 通过电化学还原的方法 将CO2转化为合成气, 不仅能够减少大气中的CO2含量, 同时还能 缓解能源危机. 但是目前仍然缺乏廉价高效的电催化剂来实现可 控比例CO/H2的合成. 因此, 我们发展了一种简易的等离子体处理 策略, 利用氮掺杂碳纳米管阵列作为电催化剂, 通过电化学CO2-H2O还原制备CO/H2比例可控的合成气. 在不同的等离子体处理条 件下, CO/H2比例的范围可达0.55–3.03, 符合下游化工生产的原料 气标准. 通过优化等离子体处理条件, CO的法拉第效率最高可达 75%, 并且能够维持稳定性长达10 h. 通过研究氮掺杂的碳纳米管 的结构随处理条件的变化, 并结合其CO2还原活性, 我们推断出氮 掺杂碳纳米管中的吡啶氮有利于CO2转化为CO, 而吡咯氮和sp2平 面外的碳则有利于氢气的产生. 利用等离子体处理的方法能够有 效调节催化剂中各活性组分的比例, 从而调控CO2还原反应和析氢 反应的速率, 最终实现CO/H2比例可控的合成气制备.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: CO2 Reduction Techniques and Catalysts · Catalytic Processes in Materials Science · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
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