纳米棒
煅烧
硫黄
兴奋剂
材料科学
催化作用
电化学
电催化剂
吸附
化学工程
法拉第效率
无机化学
化学
纳米技术
物理化学
电极
冶金
有机化学
光电子学
工程类
作者
Shihai Cao,Zhen Guan,Yanchao Feng,Huiya Wang,Rui Li,Keqiang Ding
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-03-09
卷期号:5 (3): 3591-3598
被引量:5
标识
DOI:10.1021/acsanm.1c04177
摘要
Sulfur-doped Sb2O3 nanorods (X-Sb2O3) have been synthesized via a self-assembly process with subsequent calcination, using bulk Sb as the precursor and H2SO4 as the sulfur source. The obtained X-doped Sb2O3 nanorods were confirmed as efficient and stable catalysts for electrochemical nitrogen reduction, which exhibited a superior ammonia yield of 6.88 μg h–1 cm–2 with a Faradaic efficiency of 32.5% at −0.18 V versus RHE. Moreover, the doping amount of sulfur in X-Sb2O3 could be controlled by the calcination temperatures in a muffle furnace. Density functional theory calculations revealed that N2 was readily adsorbed on the O atom of the 300-Sb2O3 surface, and the subsequent reduction reactions further occurred on the O active site by the distal mechanism. Meanwhile, the superior electrocatalyst performance of 300-Sb2O3 was attributed to sulfur doping, which effectively tuned the electronic structures of Sb2O3 to promote the adsorption and activation ability of N2. This work provides an easy and efficient way to dope non-metals in Sb2O3 for excellent electrocatalytic performance.
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