In Situ Spectroscopic Studies of NH3 Oxidation of Fe-Oxide/Al2O3

被引：2

作者：

Cha, Byeong Jun ^{[1
,2
]}

Choi, Ji Yoon ^{[1
]}

Kim, Soo Hyun ^{[1
]}

Zhao, Shufang ^{[1
]}

Khan, Sher Ali ^{[1
]}

Jeong, Beomgyun ^{[3
]}

Kim, Young Dok ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Dept Chem, Suwon 16419, Gyeonggi Do, South Korea

[2] Korea Basic Sci Inst, Ctr Sci Instrumentat, Ochang 28119, South Korea

[3] Korea Basic Sci Inst, Ctr Mat Anal, Daejeon 34133, South Korea

来源：

ACS OMEGA | 2023年 / 8卷 / 20期

基金：

新加坡国家研究基金会;

关键词：

SELECTIVE CATALYTIC-OXIDATION; MULTIPLET STRUCTURE; AMMONIA OXIDATION; FT-IR; ADSORPTION; NANOPARTICLES; REDUCTION; MECHANISM; NITROGEN; REMOVAL;

D O I：

10.1021/acsomega.3c01380

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Simple temperature-regulatedchemical vapor deposition was usedto disperse iron oxide nanoparticles on porous Al2O3 to create an Fe-oxide/Al2O3 structurefor catalytic NH3 oxidation. The Fe-oxide/Al2O3 achieved nearly 100% removal of NH3, withN(2) as a major reaction product at temperatures above 400 & DEG;C and negligible NO x emissions atall experimental temperatures. The results of a combination of insitu diffuse reflectance infrared Fourier-transform spectroscopy andnear-ambient pressure-near-edge X-ray absorption fine structurespectroscopy suggest a N2H4-mediated oxidationmechanism of NH3 to N-2 via the Mars-vanKrevelen pathway on the Fe-oxide/Al2O3 surface.As a catalytic adsorbent an energy-efficient approach to reducingNH(3) levels in living environments via adsorption and thermaltreatment of NH3 no harmful NO x emissions were produced during the thermal treatment of theNH(3)-adsorbed Fe-oxide/Al2O3 surface,while NH3 molecularly desorbed from the surface. A systemwith dual catalytic filters of Fe-oxide/Al2O3 was designed to fully oxidize this desorbed NH3 to N-2 in a clean and energy-efficient manner.

引用

页码：18064 / 18073

页数：10