Generation of multi-valence CuxO by reduction with activated semi-coke and their collaboration in the selective reduction of NO with NH3

Peng, Bo1; Liang, Shuoyang2; Yan, Zheng3; Wang, Hao1,4; Meng, Zhao4; Zhang, Mei1

2022-02-03

10.1039/d1ra07647g

RSC ADVANCES   影响因子和分区

2046-2069

Multi-valence CuxO has been demonstrated to have high activity in the low-temperature selective catalytic reduction of NOx with NH3 (NH3-SCR). Here, CuxO was loaded onto activated semi-coke (ASC) for SCR, which has shown satisfactory low-temperature SCR activity. By virtue of the reduction property of carbon, the valence of Cu was regulated by simply adjusting the calcination temperature. The high concentration of Cu+ generated from the reduction of CuO by ASC during calcination can collaborate to form Cu2+/Cu+ circulation. After systematic characterization by XPS, H-2-TPD, and NH3-TPR, it is revealed that abundant acidic sites and surface reactive oxygen species are formed on the surface of the catalysts. Further investigation with in situ DRIFTS confirms that the NH3-SCR over the as-prepared CuO|Cu2O-ASC catalysts simultaneously follows the Langmuir-Hinshelwood (L-H) and Eley-Rideal (E-R) pathways, attributed to the synergistic effects of Cu2+ and Cu+.

SCI ; EI

英语

其他

National Natural Science Foundation of China[51672025,51572020,51372019] ; Major Projects of Science and Technology in Shanxi Province[MC2016-03]

Chemistry

Chemistry, Multidisciplinary

WOS:000751914600001

ROYAL SOC CHEMISTRY

20220711650314

Calcination ; Catalyst activity ; Coke ; Copper oxides ; Reduction ; Selective catalytic reduction ; Temperature

Air Pollution Control:451.2 ; Solid Fuels:524 ; Thermodynamics:641.1 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2

Web of Science

1.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Shenyang Aerosp Univ, Coll Energy & Environm, Shenyang 110136, Peoples R China
4.Peking Univ, Sch Mat Sci & Engn, Beijing 100871, Peoples R China

Peng, Bo,Liang, Shuoyang,Yan, Zheng,et al. Generation of multi-valence CuxO by reduction with activated semi-coke and their collaboration in the selective reduction of NO with NH3[J]. RSC ADVANCES,2022,12(8):4672-4680.

Peng, Bo,Liang, Shuoyang,Yan, Zheng,Wang, Hao,Meng, Zhao,&Zhang, Mei.(2022).Generation of multi-valence CuxO by reduction with activated semi-coke and their collaboration in the selective reduction of NO with NH3.RSC ADVANCES,12(8),4672-4680.

Peng, Bo,et al."Generation of multi-valence CuxO by reduction with activated semi-coke and their collaboration in the selective reduction of NO with NH3".RSC ADVANCES 12.8(2022):4672-4680.