在Fe2O3上的匹配动力学过程-Co/NiO异构结构使得高效的酸盐电还原到氨的过程成为可能
Qiang Yang1,2, Yongguang Bu3, Shuailei Pu1,2
1State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
这项研究引入了一种新的电催化剂,用于通过酸盐电还原来合成绿色氨. 替代的铁层复合氧化物显著提高了氨的选择性和产量.
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
- 绿色化学 绿色化学
背景情况:
- 双重酸盐电还原 (NO3−RR) 是绿色氨 (NH3) 合成的一个有前途的途径.
- 在NO3−RR中不匹配的动力学导致NH3的选择性较差和酸盐 (NO2−) 副产品的形成.
研究的目的:
- 设计和研究Ni2+替代的Co/Fe层状双氧化物 (LDO) 作为NO3−RR的双联电催化剂.
- 通过解决NO3−RR过程中的动力不匹配,提高NH3的选择性和产量.
主要方法:
- 合成 Ni2+ 替代的 Co/Fe LDO.
- 使用脉冲电解对NO3−RR进行电化学测试.
- 在现场/操作特征和理论计算.
主要成果:
- (Co0.83Ni0.16) 2Fe催化剂实现了高NH3产率 (50.4 mg·cm−2·h−1) 和法拉第效率 (97.8%).
- 替代增强了NH3的选择性,因为它改变了Co电子的行为,并提供了活性 (*H) 位.
- 在Co位点观察到*NO2的优化吸附和化.
结论:
- 在Co/Fe LDO中替代Ni有效地促进了NO3−RR动力学和NH3演变的选择性.
- 这些发现为设计先进的双联电催化剂提供了洞察力,以实现可持续的氨合成.
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