Novel porous Al-based composites for improved Al–water reaction performances by spark plasma sintering

Jinfan Wu; Tao Wang; Fen Xu; Lixian Sun; Lumin Liao; Yuan Gao; Yanxun Guan; Hehui Wang; Guorong Zhang; Zhong Cao; Julan Zeng

doi:10.1039/D3SE01162C

Novel porous Al-based composites for improved Al–water reaction performances by spark plasma sintering

Jinfan Wu,^a Tao Wang,^a Fen Xu,

*^a Lixian Sun,

*^a Lumin Liao,^ab Yuan Gao,^a Yanxun Guan,^ab Hehui Wang,^a Guorong Zhang,^a Zhong Cao^c and Julan Zeng^c

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* Corresponding authors

^a Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, P. R. China
E-mail: xufen@guet.edu.cn, sunlx@guet.edu.cn

^b School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, P. R. China

^c School of Chemical Engineering, Changsha University of Science and Technology, Changsha 410076, P. R. China

Abstract

A series of novel porous hydrogen-generation materials with the formulae Al–(BiO)₂CO₃, Al–4BiNO₃(OH)₂·BiO(OH), and Al–Bi₂(SO₄)₃ were synthesized by ball milling and spark plasma sintering (SPS). Their hydrogen-production properties were investigated. The results revealed that doping Al–(BiO)₂CO₃ in aluminium powder was the most effective for improving the hydrogen-generation performance. The hydrogen-conversion yield and maximum hydrogen-generation rate (MHGR) of the Al–(BiO)₂CO₃ block reached 94.9% and 384.6 mL g⁻¹ min⁻¹, respectively. Mechanism study indicated that (BiO)₂CO₃ decomposed into Bi₂O₃ and CO₂, and the produced Bi₂O₃ could react with Al to produce Bi and Al₂O₃in situ during the SPS process. Herein, the produced CO₂ could also form a large number of holes in the bulk sample under the action of sintering pressure to obtain the porous Al–(BiO)₂CO₃ composite. The hydrogen-generation performance of Al–(BiO)₂CO₃ was thus substantially enhanced under the synergistic effect of these factors.

Sustainable Energy & Fuels

Novel porous Al-based composites for improved Al–water reaction performances by spark plasma sintering

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Novel porous Al-based composites for improved Al–water reaction performances by spark plasma sintering

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