Polyanilines (pANIs), loaded with phosphotungstic acid (PTA), are pyrolyzed to get WO or W N (≈6 and ≈7 nm, respectively), which is well-dispersed on pANI-derived porous carbons (pDCs). Depending on the pyrolysis temperature, WO /pDC, W N/pDC, or W N-W/pDCs could be obtained selectively. pANI acts as both the precursor of pDC and the nitrogen source for the nitridation of WO into W N during the pyrolysis. Importantly, W N could be obtained from the pyrolysis without ammonia feeding. The obtained W N/pDC is applied as a heterogeneous catalyst for the oxidative desulfurization (ODS) of liquid fuel for the first time, and the results are compared with WO /pDC and WO /ZrO . The W N/pDC is very efficient in ODS with remarkable performance compared with WO /pDC or WO /ZrO , which is applied as a representative ODS catalyst. For example, W N/pDC shows around 3.4 and 2.7 times of kinetic constant and turnover frequency (based on 5 min of reaction), respectively, compared to that of WO /ZrO . Moreover, the catalysts could be regenerated in a facile way. Therefore, W N/pDC could be produced facilely from pyrolysis (without ammonia feeding) of PTA/pANI, and W N, well-dispersed on pDC, can be suggested as a very efficient oxidation catalyst for the desulfurization of liquid fuel.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/smll.201901564 | DOI Listing |
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!