通过控制现场重建以实现高效的工业电流密度CO2-to-C2+电还原的顺序性*CO管理
Mao Wu1,2, Danji Huang3,4, Feili Lai5
1State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China.
概括
在铜 (Cu) 催化剂上管理一氧化碳 (*CO) 覆盖和二极化是有效减少二氧化碳 (CO2R) 到C2+产品的关键. 本研究开发了具有100个方面的Cu数组,以实现高选择性和电流密度的顺序*CO管理.
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:
- 有效地将二氧化碳 (CO2R) 减少为C2+产品,需要精确控制铜 (Cu) 催化剂上的*CO覆盖和二极化.
- 在CO2R过程中催化剂重建通常会导致不可预测的表面变化,阻碍高性能合理设计.
研究的目的:
- 开发一种用于构建 Cu 阵列的方法,以控制 (100) 个方面,以增强 CO2 R.
- 为了实现*CO覆盖和二极化对高选择性和部分电流密度在CO2R中的顺序管理.
主要方法:
- 使用同步连接体漏来指导CO2R诱导催化剂重建期间的播种-生长过程.
- 通过受控重建构建具有优先 (100) 面的Cu数组.
- 调查梯度扩散对*CO覆盖面和二元化动态的影响.
主要成果:
- 通过联体辅助重建成功制造了具有主导 (100) 面的 Cu 阵列.
- 由于梯度扩散,实现了高*CO覆盖率,使C2+产品具有高部分电流密度.
- 在 (100) 个方面证明了增强的C2+选择性,归因于较低的*CO二元化能量障碍.
- 在700 mA cm-2.2时,达到C2+的86.1%和C2H4的60.8%的工业相关的法拉第效率 (FE).
结论:
- 在具有 (100) 个方面的重建 Cu 阵列上的顺序 * CO 管理是高性能 CO2R 的可行策略.
- 开发的方法提供了对催化剂演化和反应中间体的原子-分子规模洞察力,适用于各种电催化反应.
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