双金属片
催化作用
无机化学
化学
吸附
电化学
硝酸盐
材料科学
电极
物理化学
有机化学
作者
Jun Cheng,Guorun Dai,Wenjuan Sun,Xiàn Yáng,Rongxin Xia,Yang Xu,Yuxiang Mao
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2024-01-11
卷期号:38 (3): 2501-2510
标识
DOI:10.1021/acs.energyfuels.3c04371
摘要
This work aimed to improve the Faraday efficiency and formation rate of ammonia with a low reaction potential in the electroreduction of nitrate. For this purpose, CuCo bimetallic interface-rich catalysts confined in porous nitrogen-doped carbon nanocages (CuCo/NC) were designed. Results of in situ Fourier transform infrared spectroscopy suggested that the reaction path followed the sequence NO3– → *NO3 → *NO2 → *NO → *NOH → *NH2OH → *NH3 → NH3. Density functional theory calculations revealed that the adsorption of nitrate over the CuCo bimetallic interface was thermodynamically favorable. CuCo bimetallic interface changed the rate-determining step of nitrate reduction at Cu sites from nitrate adsorption to *NO hydrogenation and promoted the continuous hydrogenation of nitrogen-related intermediates. Over the CuCo/NC catalyst, Faraday efficiency and formation rate of ammonia were 95.1% (at −0.59 V vs reversible hydrogen electrode (RHE)) and 9110.8 μg h–1 mgcat.–1 (at −0.79 V vs RHE), which were higher than those over Cu/NC and Co/NC catalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI