High‐Performance Flow Alkali‐Al/Acid Hybrid Fuel Cell for High‐Rate H2 Generation. (23rd June 2021)

• Record Type: Journal Article
• Authors: Zhang, Mengtian; Li, Hao; Cai, Pingwei; Chen, Kai; Wen, Zhenhai
• Is Part Of: Advanced functional materials. Volume 31:Number 35(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-23
• Subjects: alkali‐Al/acid hybrid fuel cells -- electrochemical neutralization energy -- high‐rate H 2 generation -- hydrogen evolution reaction -- Ru‐based catalysts; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202103248
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Hydrogen (H2 ) has been utilized as a versatile feedstock or promising energy carrier in a variety of fields, yet the implementation of high‐rate H2 production presents a grand challenge for its readily accessible application. Herein, a newly alkali‐Al/acid hybrid fuel cell (3AHFC) that shows the capability of rapidly producing H2 upon delivering a considerably high energy density is reported, which is set up by paring Al anode in alkaline anolyte with acidic catholyte and a relatively cheap nanohybrid of Ru nanoparticle decorating crumpled reduced graphene oxide (Ru/c‐rGO) as cathode catalysts. It is demonstrated that the 3AHFC can release a power density of up to 240.6 mW cm −2 with a Faradic efficiency of approaching 99% for fast H2 generation (300 mA cm −2 ). Such hybrid electrolyte H2 ‐generation fuel cell can also be extended for either seawater anolyte or metallic Mg anode, presenting great promise for the practice feasibility of on‐site H2 production for applications in tough or even extreme environments. Abstract : A newly alkali‐Al/acid hybrid fuel cell (3AHFC) is reported, which is capable of generating a high power density with synchronously generating H2 at a quite large rate. The 3AHFC can release a power density of up to 240.6 mW cm −2 with a Faradic efficiency of approaching 99% for fast H2 generation (300 mA cm −2 ).