In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 18 ( 2022), p. 10181-10191
Abstract:
Coupling oxidative biomass valorization with H 2 production in a hybrid water splitting configuration is of significant importance to yield sustainable and value-added carbon products. Herein, we report an earth-abundant alloy catalyst, Cu-doped Ni nanotubes (NiCu NTs), through a simple electrodeposition-dealloying route, which acts as a competent catalyst for the electrocatalytic oxidation (ECO) of 5-hydroxymethylfurfural (HMF) at the anode and simultaneous cathodic H 2 evolution. The cell potential required to deliver a benchmark current density of 100 mA cm −2 is greatly decreased by 350 mV with respect to the conventional overall water splitting, demonstrating a better energy consumption efficiency. When being employed as an anodic catalyst, the NiCu NTs catalyst enables ∼100% conversion of HMF and ∼99% yield of 2,5-furandicarboxylic acid (FDCA) with 20 mM HMF in 1.0 M KOH, and a good-to-excellent product yield can be obtained at an increased HMF concentration from 35 to 100 mM. The potential-dependent Raman results reveal that the electrogenerated Ni 3+ OOH species are the intermediates to promote HMF oxidation. Moreover, the catalyst also delivers almost ∼100% conversion and selectivity to the corresponding acid products when extending the organic substrates to other small alcohols/aldehydes, demonstrating its splendid versatility.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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