用等离子辅助表面化质子互的WO3,用于高效的电催化氨合成
Zhiyuan Zhang1, Christopher Kondratowicz2, Jacob Smith3
1Department of Chemistry, Rutgers, the State University of New Jersey, Newark, New Jersey 07102, United States.
概括
这项研究引入了一种新的混合WOxNγ/WO3催化剂,通过电催化降解来合成绿色氨. 催化剂实现了高产量和选择性,优于现有的过渡金属氧化物催化剂.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 电催化降解 (eNRR) 是一种生产氨 (NH3) 的可持续方法.
- 过渡金属氧化化物 (TMOxNγ) 是有前途的,但与产量和法拉达效率 (FE) 相斗争.
研究的目的:
- 开发一种新的混合WOxNγ/WO3催化剂,具有独特的异质界面肤色 (HIC) 结构.
- 为了提高NH3的选择性和产量在NNRR中,同时抑制进化反应 (HER).
主要方法:
- 使用微波热水生长和等离子体辅助表面化制造混合WOxNγ/WO3催化剂.
- 电化学表征以评估NH3产量,FE和反应机制.
- 在催化剂接口的现场生成活性原子 (H*).
主要成果:
- 混合催化剂的NH3产量达到了3.2 × 10−10mol·cm−2·s−1的4.01%FE.
- 该HIC结构促进了的化和空缺的形成,增强了NNRR的选择性.
- 据证实,Mars-van Krevelen (MvK) 机制是使用HIC增强的.
结论:
- 开发的具有HIC结构的WOxNγ/WO3催化剂显著提高了eNRR性能.
- 这种催化剂设计为高效和选择性的绿色氨合成提供了一个有希望的策略.
- 这些发现为电催化氨生产的实际应用铺平了道路.
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