TiN as Radical Scavenger in Fe―N―C Aerogel Oxygen Reduction Catalyst for Durable Fuel Cell

Luo, Yi1,2; Li, Ke3; Hu, Yijie1; Chen, Teng2; Wang, Qichen4; Hu, Jianqiang2; Feng, Jian1; Feng, Junzong1

2024-02-01

10.1002/smll.202309822

SMALL   影响因子和分区

1613-6810

1613-6829

["FeNC is the most promising alternative to platinum-based catalysts to lower the cost of proton-exchange-membrane fuel cell (PEMFC). However, the deficient durability of FeNC has hindered their application. Herein, a TiN-doped FeNC (FeNC/TiN) is elaborately synthesized via the sol-gel method for the oxygen-reduction reaction (ORR) in PEMFC. The interpenetrating network composed by FeNC and TiN can simultaneously eliminate the free radical intermediates while maintaining the high ORR activity. As a result, the H2O2 yields of FeNC/TiN are suppressed below 4%, approximate to 4 times lower than the FeNC, and the half-wave potential only lost 15 mV after 30 kilo-cycle accelerated durability test (ADT). In a H2O2 fuel cell assembled with FeNC/TiN, it presents 980 mA cm-2 current density at 0.6 V, 880 mW cm-2 peak power density, and only 17 mV voltage loss at 0.80 A cm-2 after 10 kilo-cycle ADT. The experiment and calculation results prove that the TiN has a strong adsorption interaction for the free radical intermediates (such as *OH, *OOH, etc.), and the radicals are scavenged subsequently. The rational integration of Fe single-atom, TiN radical scavenger, and highly porous network adequately utilize the intrinsic advantages of composite structure, enabling a durable and active Pt-metal-free catalyst for PEMFC.","This work presents a TiN-doped FeNC aerogel via the sol-gel method for the oxygen reduction reaction (ORR) in PEMFC. The TiN can eliminate the radical intermediates while Fe single-atoms catalyze the ORR. The rational design that combines the advantages of Fe single-atom, TiN radical scavenger, and highly porous network enables a durable and active Pt-metal-free catalyst for PEMFC. image"]

aerogel durability FeNC proton exchange membrane fuel cell radical scavenger TiN

SCI ; EI

英语

通讯

Jiangsu Provincial Natural Science Foundation of China[BK20230198] ; Xuzhou Youth Science and Technology Project[KC22033] ; null[5230022158]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001169770300001

WILEY-V C H VERLAG GMBH

20240815619038

Catalysts ; Durability ; Electrolytic reduction ; Free radicals ; Oxygen ; Proton exchange membrane fuel cells (PEMFC) ; Sols

Ore Treatment:533.1 ; Fuel Cells:702.2 ; Colloid Chemistry:801.3 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

Web of Science

1.Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Adv Ceram Fibers & Composites Lab, 109 De Ya Rd, Changsha 410073, Hunan, Peoples R China
2.AF Logist Acad, Dept Aviat Oil & Mat, 72 Xi Ge Rd, Xuzhou 221000, Jiangsu, Peoples R China
3.Wuhan Univ, Coll Chem & Mol Sci, 299 Ba Yi Rd, Wuhan 300720, Hubei, Peoples R China
4.Southern Univ Sci & Technol, Dept Chem, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China

Luo, Yi,Li, Ke,Hu, Yijie,等. TiN as Radical Scavenger in Fe―N―C Aerogel Oxygen Reduction Catalyst for Durable Fuel Cell[J]. SMALL,2024,20.

Luo, Yi.,Li, Ke.,Hu, Yijie.,Chen, Teng.,Wang, Qichen.,...&Feng, Junzong.(2024).TiN as Radical Scavenger in Fe―N―C Aerogel Oxygen Reduction Catalyst for Durable Fuel Cell.SMALL,20.

Luo, Yi,et al."TiN as Radical Scavenger in Fe―N―C Aerogel Oxygen Reduction Catalyst for Durable Fuel Cell".SMALL 20(2024).