Metal-doped (Fe-Mn) heteroatom-rich porous biochar-based poison-resilient cathode catalyst for enhanced performance of microbial fuel cell

IF 7 2区工程技术 Q1 ENERGY & FUELS Sustainable Energy Technologies and Assessments Pub Date : 2025-03-01 Epub Date: 2025-01-30 DOI:10.1016/j.seta.2025.104208

Gorakhanath S. Jadhav , Arun Kumar Mehta , Makarand M. Ghangrekar , Gourav D. Bhowmick

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Abstract

Developing cost-effective and superior catalysts for the oxygen reduction reaction (ORR) is paramount for successfully commercializing microbial fuel cells (MFCs) as a sustainable, reliable and economical alternative for energy recovery and wastewater treatment. In this investigation, metal-doped heteroatom (Nitrogen-Sulphur-Carbon) rich porous biochar (Metal-NSC) was synthesized by incorporating different metal and bi-metal dopants into activated human hair (HH) biochar. Out of which, the synthesized Fe/Mn-NSC catalyst has a porous structure that enables it to have a high specific surface area (615.04 m²/g), a large pore volume (0.4342 cm³/g), and numerous defects (I_D/I_G = 1.02). The Fe/Mn-NSC demonstrates exceptional performance in the ORR, and the performance of MFC using Fe/Mn-NSC as a cathode catalyst stands out with a higher power density (14.6 ± 0.6 W/m³), which was 1.74 and 1.14 times compared to only HH biochar (NSC) (8.4 ± 0.1 W/m³) and commercial Pt/C (12.8 ± 0.3 W/m³), respectively. Thus, the Fe/Mn-NSC catalyst exhibits promising potential to harvest more power per unit cost (64.69 mW/$) and superior alternative to commercial Pt/C catalyst (3.11 mW/$) for widespread deployment for practical applications in MFCs.

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金属掺杂（Fe-Mn）富杂原子多孔生物炭基毒弹性阴极催化剂用于提高微生物燃料电池性能

微生物燃料电池（mfc）是一种可持续、可靠、经济的能源回收和废水处理替代方案，开发高性价比的氧还原反应（ORR）催化剂对于微生物燃料电池（mfc）成功商业化至关重要。本研究通过将不同的金属和双金属掺杂剂掺入活化的人发（HH）生物炭中，合成了掺杂金属杂原子（氮-硫-碳）的富多孔生物炭（metal- nsc）。其中，合成的Fe/Mn-NSC催化剂具有多孔结构，具有较高的比表面积（615.04 m2/g）、较大的孔体积（0.4342 cm3/g）和众多的缺陷（ID/IG = 1.02）。Fe/Mn-NSC在ORR中表现出优异的性能，使用Fe/Mn-NSC作为阴极催化剂的MFC性能表现出更高的功率密度（14.6±0.6 W/m3），分别是HH生物炭（NSC）（8.4±0.1 W/m3）和商用Pt/C（12.8±0.3 W/m3）的1.74和1.14倍。因此，Fe/Mn-NSC催化剂在单位成本（64.69 mW/$）上具有更大的发电潜力，是商业Pt/C催化剂（3.11 mW/$）的优良替代品，可广泛应用于mfc的实际应用。

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来源期刊

Sustainable Energy Technologies and Assessments Energy-Renewable Energy, Sustainability and the Environment

CiteScore

12.70

自引率

12.50%

发文量

1091

期刊介绍： Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.