Atomic Dispersion Ir‑N‑C Catalysts for Anode Anti‑poisoning Electrolysis in Fuel Cell

doi:10.19894/j.issn.1000-0518.210477

Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (8): 1202-1208.DOI: 10.19894/j.issn.1000-0518.210477

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Atomic Dispersion Ir‑N‑C Catalysts for Anode Anti‑poisoning Electrolysis in Fuel Cell

Xian WANG¹^,², Xiao-Long YANG¹^,², Rong-Peng MA¹^,², Chang-Peng LIU¹^,², Jun-Jie GE¹^,²(), Wei XING¹^,²()

^1.State Key Laboratory of Electroanalytical Chemistry，Changchun Institute of Applied Chemistry，Chinese Academy of Sciences，Changchun 130022，China
^2.School of Applied Chemical Engineering，University of Science and Technology of China，Hefei 230026，China

Received:2021-09-24 Accepted:2022-02-22 Published:2022-08-01 Online:2022-08-04
Contact: Jun-Jie GE,Wei XING
About author:xingwei@ciac.ac.cn
gejj@ciac.ac.cn
Supported by:
the National Science and Technology Major Project(2017YFB0102905);the Jilin Province Science and Technology Development Program(20190201300JC)

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Abstract

Abstract:

The anti-poisoning behavior of the anode catalyst， especially the tolerance to CO， is of vital importance for the widespread application of fuel cells. Herein， we successfully synthesize an Ir based catalyst in atomic dispersion. The Ir-N-C catalyst has excellent electrocatalytic performance for formic acid oxidation， which represents the mass activity that is 48 times of the commercial Pd/C. In a single cell， the Ir-N-C catalyst represents a mass specific power density at 281 mW/mg， which is 3 times higher than of the Pd/C catalyst. Furthermore， the Ir-N-C catalysts show amazing CO anti-poisoning performance. After a long-term test of 14000 s， its activity only decays by 68%， which is much better than commercial Pd/C catalysts （85%）. In addition， the catalyst can be easily prepared， which provides a new path for the large-scale preparation of single-atom catalysts.

Key words: Fuel cell, Single-atom catalyst, CO anti-poisoning, Large-scale preparation

CLC Number:

O646

Xian WANG, Xiao-Long YANG, Rong-Peng MA, Chang-Peng LIU, Jun-Jie GE, Wei XING. Atomic Dispersion Ir‑N‑C Catalysts for Anode Anti‑poisoning Electrolysis in Fuel Cell[J]. Chinese Journal of Applied Chemistry, 2022, 39(8): 1202-1208.

Figures/Tables 6

Fig.1 Schematic of Ir-N-C catalysts

Fig.2 （A） TEM for the Ir-N-C，（B） The HAADF-STEM image of Ir-N-C，（C－F） Energy-dispersive X?ray elemental mapping of Ir-N-C

Fig.3 （A） CV curve for the Ir-N-C，（B） commercial Pd/C，（C） CV curve for the Ir-C in 0.1 mol/L HClO4 solution， and the sweep rate is 20 mV/s，（D） Ir-C in 0.1 mol/L HClO4/0.5 mol/L HCOOH solution， and the sweep rate is 20 mV/s

Fig.4 Single cell test results for Ir-N-C and Pd/C at 30 ℃

Fig.5 Stability tests for the CV cycling between Ir-N-C and Pd/C

Fig.6 （A） The i-t curve of Ir-N-C and （B） commercial Pd/C in the electrolyte is 0.1 mol/L HClO4/0.5 mol/L HCOOH solution， and the sweep rate is 20 mV/s

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Atomic Dispersion Ir‑N‑C Catalysts for Anode Anti‑poisoning Electrolysis in Fuel Cell

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