Multi-functional layered double hydroxides supported by nanoporous gold toward overall hydrazine splitting

doi:10.1007/s11705-023-2373-1

Front. Chem. Sci. Eng.

2024, Vol. 18

Issue (1) : 6 https://doi.org/10.1007/s11705-023-2373-1

RESEARCH ARTICLE

Multi-functional layered double hydroxides supported by nanoporous gold toward overall hydrazine splitting

Yongji Qin¹, Huijie Cao^2,³, Qian Liu⁴, Shaoqing Yang¹, Xincai Feng¹, Hao Wang⁵, Meiling Lian⁶, Dongxing Zhang¹, Hua Wang¹, Jun Luo¹(

), Xijun Liu³(

)

¹. ShenSi Lab, Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518110, China
². Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
³. State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
⁴. Institute for Advanced Study, Chengdu University, Chengdu 610106, China
⁵. China National Coal Group Corporation, Beijing 100120, China
⁶. Tianjin Engineering Research Center of Civil Aviation Energy Environment and Green Development, School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China

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Abstract

Layered double hydroxides have demonstrated great potential for the oxygen evolution reaction, which is a crucial half-reaction of overall water splitting. However, it remains challenging to apply layered double hydroxides in other electrochemical reactions with high efficiency and stability. Herein, we report two-dimensional multifunctional layered double hydroxides derived from metal-organic framework sheet precursors supported by nanoporous gold with high porosity, which exhibit appealing performances toward oxygen/hydrogen evolution reactions, hydrazine oxidation reaction, and overall hydrazine splitting. The as-prepared catalyst only requires an overpotential of 233 mV to reach 10 mA·cm^–2 toward oxygen evolution reaction. The overall hydrazine splitting cell only needs a cell voltage of 0.984 V to deliver 10 mA·cm^–2, which is far more superior than that of the overall water splitting system (1.849 V). The appealing performances of the catalyst can be contributed to the synergistic effect between the metal components of the layered double hydroxides and the supporting effect of the nanoporous gold substrate, which could endow the sample with high surface area and excellent conductivity, resulting in superior activity and stability.

Keywords layered double hydroxide oxygen evolution reaction hydrazine oxidation reaction overall hydrazine splitting hydrogen production

Corresponding Author(s): Jun Luo,Xijun Liu

About author:

Peng Lei and Charity Ngina Mwangi contributed equally to this work.

Just Accepted Date: 09 October 2023 Issue Date: 21 November 2023

Cite this article:

Yongji Qin,Huijie Cao,Qian Liu, et al. Multi-functional layered double hydroxides supported by nanoporous gold toward overall hydrazine splitting[J]. Front. Chem. Sci. Eng., 2024, 18(1): 6.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-023-2373-1
https://academic.hep.com.cn/fcse/EN/Y2024/V18/I1/6

Fig.1 Schematic illustration of the fabrication process of the NPG-HS-LDH.

Fig.2 (a) TEM, (b) SEM, (c) XRD, (d) HAADF-STEM and elemental mapping images of the NPG-HS-LDH.

Fig.3 XPS data of the NPG-HS-LDH: (a) XPS survey spectrum; HR-XPS spectra of the (b) Ni 2p, (c) Co 2p, (d) Fe 2p, (e) Cu 2p and (f) Au 4f.

Fig.4 The electrochemical OER performances of the as-prepared samples. (a) Polarization curves; (b) Tafel plots; (c) comparison diagram of overpotentials and Tafel slopes; (d) double-layer capacitances (C_dl); (e) EIS spectra. (f) stability test at constant current density of 10 mA·cm^–2 of the NPG-HS-LDH.

Fig.5 (a) HzOR performance of the NPG-HS-LDH; (b) schematic illustration of the OHzS device; (c) OWS and OHzS LSV curves of the NPG-HS-LDH taken in a two-electrode system; (d) stability test of the NPG-HS-LDH.

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