Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 10, Issue 2, Pages 911-922Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c06692
Keywords
Biomass; Inherent N functionality; P-doped porous carbon; Metal-free; Aerobic oxidation
Categories
Funding
- National Natural Science Foundation of China [32171726, 31770611, 31870561]
- Natural Science Foundation of Fujian Province [2019J01388]
- Nanping City Resources Industry Science and Technology Innovation Joint Funding Project [N2020Z005]
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By using low-cost, N-containing biomass waste peanut shells and phosphoric acid, researchers successfully introduced P element into the carbon skeleton and obtained P-doped porous carbon materials with superior catalytic activity.
Based on low-cost, N-containing biomass waste peanut shells and phosphoric acid, the P element was successfully introduced into the carbon skeleton to obtain P-doped porous carbon materials, with inherent N functionality. In comparison to carbon catalysts functionalized with just N or P (NC-800 or PC), the as-prepared P-doped, N-containing porous carbon materials (NPC-T) possessed superior catalytic activity toward the aerobic oxidation of benzyl alcohol (BA). According to these findings, a synergistic effect of N and P species on the catalytic efficiency of carbon materials was observed. The amounts of graphitic N and C3PO species on the surface of NPC-T were shown to be correlated with catalytic activity. In the case of NPC-800, 100% conversion and 99.7% selectivity could be achieved along with a high TOF value (2.49 x 10(-3) mol.g(-1).h(-1)). Even when applied to various alcohols, the NPC-800 still showed good catalytic activity. Based upon the mechanistic investigations, both radical and nonradical reaction pathways occurred during the aerobic oxidation of BA over the NPC-800. Furthermore, to facilitate catalyst recycling, the granular P-doped, N-containing carbon (granular NPC-800) was generated, utilizing a kneading heat treatment and extrusion molding technique that did not require the addition of any extra adhesive. This work highlighted the potential high-value utilization of biomass waste in constructing P-doped, N-containing carbon materials and the application as metal-free catalysts in the aerobic selective oxidation reactions.
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