Robust cellulose fiber/fibrous sepiolite coated RuO2-CoP aerogel as monolithic catalyst for hydrogen generation via NaBH4 hydrolysis

Si Ye; Yufeng Wang; Chenchen Wang; Lei Cheng; Lixian Sun; Puxuan Yan

doi:10.1016/j.jcis.2023.02.082

Robust cellulose fiber/fibrous sepiolite coated RuO₂-CoP aerogel as monolithic catalyst for hydrogen generation via NaBH₄ hydrolysis

J Colloid Interface Sci. 2023 Jun:639:284-291. doi: 10.1016/j.jcis.2023.02.082. Epub 2023 Feb 17.

Authors

Si Ye¹, Yufeng Wang¹, Chenchen Wang¹, Lei Cheng², Lixian Sun¹, Puxuan Yan³

Affiliations

¹ Guangxi Key Laboratory of Information Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
² School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China. Electronic address: chenglei@mailbox.gxnu.edu.cn.
³ Guangxi Key Laboratory of Information Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China. Electronic address: pxyan@guet.edu.cn.

PMID: 36805753
DOI: 10.1016/j.jcis.2023.02.082

Abstract

Commercial carriers have been used to prepare monolithic NaBH₄ hydrolytic catalysts, but the fixed structure and material limit the application scope and design freedom. Herein, the RuO₂-CoP catalyst is coated on the surface of fibrous sepiolite (RuO₂-CoP@aSep) by in-situ deposition, annealing in air and phosphating, which is constructed into the aerogel with cellulose nanofiber (CNF) and polyvinyl alcohol (PVA) by freeze drying process. The hydrogen generation rate (HGR) of RuO₂-CoP@aSep increases from 3655 to 10713mLmin^-1g_catalyst^-1 by adjusting the mass ratio of cobalt to ruthenium in RuO₂-CoP. Moreover, the optimized composite aerogel can get HGR (5268mLmin^-1g_catalyst^-1) by regulating its formulation, and the catalytic activity and mass loss rate of the aerogel maintains 76.6 and 0.92 % after five cycles of testing. The synergistic interaction between Ru and Co species, micro-nano porous structure, and structural coupling provide good catalytic activity and cycling performance, and show great potential in the design of controllable NaBH₄ hydrolyzed monolithic catalysts.

Keywords: Aerogel; NaBH(4) hydrolysis; Sepiolite; Transition metal phosphide.