Strengthening the Stability of the Reconstructed NiOOH Phase for 5-Hydroxymethylfurfural Oxidation

Abstract

Electrochemical oxidation of biomass-derived 5hydroxymethylfurfural (HMF) is a promising approach to produce high-value chemicals such as 2,5-furandicarboxylic acid (FDCA). However, the undesirable stability of catalysts commonly limits its potential application value. In this work, NiOOH derived from Ni(OH) 2 was determined as the main catalytic site for HMF oxidation, but the collapse of Ni(OH) 2 caused severe instability during the electrocatalytic process because of the crystal structure mismatch between NiOOH and Ni(OH) 2 . The implantation of Ce in Ni(OH) 2 (Ce-Ni(OH) 2 ) was successfully realized to address the stability issue of bare Ni(OH) 2 , since the larger ion radius of Ce could increase the Ni−O bond length and d-spacing. As a result, the activity of 14%Ce-Ni(OH) 2 has not obviously decayed after the 50 cyclic voltammetry (CV)-cycle test. HMF conversion is close to 100%, and the Faraday efficiency (FE) reaches 86.6% at the potential of 0.45 V vs Ag/AgCl. This study provides a new strategy to design stable catalysts for the conversion of biomass derivatives.

Scalable Synthesis of Dodecanethiol-Capped Bismuth Nanoparticles by a Solvent-Free Solid-State Grinding Method for Reduction of 4-Nitrophenol to 4-Aminophenol

“…Furthermore, a broad absorption peak near 3350 cm −1 and an absorption peak at 1655 cm −1 could be related to the O−H stretching and bending vibrations of moisture adsorbed on the Bi NPs surface (Figure S5a). 42 Thermogravimetric Analysis. TGA data were collected at a rate of 10 °C/min, while 7.568 mg of Bi NPs was heated with a nitrogen flow rate of 20 mL/min.…”

Recent Advances in Electrocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid by Heterogeneous Catalysts

“…Recent studies have shown that the mismatched crystal structures of M(OH) 2 and MOOH can cause phase transitions during the catalytic process, which may result in the instability of M(OH) 2 catalysts and reducing their adsorption and activation ability for HMF molecules. Therefore, the HMFOR activity of a single hydroxide system is still insufficient at present [71]. The doping of guest ions is considered an effective method for buffering lattice transition.…”

F-doped NiOOH derived from progressive reconstruction for efficient and durable water oxidation

“…Actually, both experimental results and theoretical calculations have revealed that some pre-catalysts may experience severe structural collapse during the drastic reconstruction, resulting in unsatisfactory OER stability, which is attributed to the volumetric expansion effect and/or crystal structure mismatch between pre-catalysts and reconstructed products. 27–29 In this context, it is meaningful to develop a strategy to appropriately mitigate the structural damage caused by the radical and rapid structural transformation under OER conditions.…”