Journal
CATALYSTS
Volume 12, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/catal12030273
Keywords
oxygen reduction reaction; biomass; non-precious catalyst; self-doped
Categories
Funding
- National Natural Science Foundation of China [51872075, 51922008, 52072114]
- 111 project, China [D17007]
- Henan Center for Outstanding Overseas Scientists, China [GZS2018003]
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This study presents a facile strategy for fabricating a dual metal-nitrogen-doped porous carbon catalyst using waste pig blood. The resulting catalyst exhibits excellent oxygen reduction reaction (ORR) activity, methanol tolerance, and stability, which can be attributed to its unique chemical composition and structure.
In addition to C, H and O, some biomass is also rich in mineral elements. The recovery and utilization of special mineral elements is of great significance to prepare functional materials and alleviate the current energy shortage. Herein, we describe a facile strategy for making full use of the chemical composition (C, Fe) and special structure of red blood cells (RBCs) from waste pig blood to fabricate a dual metal (Fe, Co)-nitrogen (N)-doped porous carbon catalyst by pyrolysis of a mixture of RBCs biomass, cobaltous acetate, and melamine. The porous catalyst displays a comparable activity for oxygen reduction reaction (ORR) to that of commercial Pt/C catalyst, with a half-wave potential of 0.821 V-vsRHE in alkaline media and 0.672 V-vsRHE in acid electrolyte. Especially, the as-prepared catalyst shows excellent methanol tolerance and stability in both acidic and alkaline electrolytes, which is superior to commercial Pt/C catalysts. The excellent ORR activity of FeCo-N/C-(RBC) can be ascribed to the porous morphology and the cooperation between metal and nitrogen species. This work provides a novel idea of exploiting the composition of renewable biomass to modulate the activity and stability of carbon-based ORR catalysts.
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