中药渣生物炭活化制备碳基电催化剂及其氧还原反应催化性能研究

doi:10.11896/cldb.21070205

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Abstract Using ZnCl₂ as an activator, Chinese medicine slag was converted into metal-free carbon electrocatalyst for oxygen reduction reaction through coupled pyrolysis and activation. The structural features of the carbon-based electrocatalysts and the oxygen reduction reaction performance were analyzed with SEM, nitrogen isotherm adsorption-desorption test, XRD, XPS, elemental analysis and electrochemical workstations. Especially, the product obtained with activation agent/biochar mass ratio of 4 ∶1 under 800 ℃ thermal activation, namely ZC-4 ∶1-800, which has a mesoporous and microporous structure with a specific surface area of up to 970.4 m²/g, delivered the optimal oxygen reduction electrocatalyst performance, with a starting potential of 0.9 V, a half-wave potential of 0.8 V, and a limit current density of 4.9 mA/cm², which close to that of the commercial 20wt% Pt/C. Besides, it also revealed obviously superior stability and methanol tolerance over 20%Pt/C counterpart, and thus promise great potential as sustainable alternative candidate for practical use. Meanwhile, this work also provides a new path for the resource utilization of waste biomass.

Key words： Chinese medicine slag biochar oxygen reduction reaction fuel cell

Published: Online: 2023-02-08

CLC number:	TM911.4
	O643.36

Fund:National Key R & D Program of China (2019YFC1906600), the National Natural Science Foundation of China (51806226), Natural Science Foundation of Guangdong Province (2019A1515011570),Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0101) and Youth Innovation Promotion Association CAS.

Corresponding Authors: yuanhr@ms.giec.ac.cn

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	ZHAO Yue
	LI Denian
	YANG Jizhang
	XIONG Chuanxi
	YUAN Haoran
	CHEN Yong

Cite this article:

ZHAO Yue,LI Denian,YANG Jizhang, et al. Study on the Preparation and Performance of Metal-free Electrocatalyst from Biochar of Chinese Medicine Slag Toward Oxygen Reduction Reaction[J]. Materials Reports, 2023, 37(2): 21070205-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21070205 OR http://www.mater-rep.com/EN/Y2023/V37/I2/21070205

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