Process coupling of CO₂reduction and 5-HMF oxidation mediated by defect-enriched layered double hydroxides

Abstract

Aiming at the comprehensive utilization of waste carbon resources and renewable carbon resources, we put forward the photocatalytic coupling process of CO2 reduction and 5-hydroxymethylfurfural (5-HMF) oxidation mediated by the...

Deciphering the Stability Mechanism of Cu Active Sites in CO2 Electroreduction via Suppression of Antibonding Orbital Occupancy in the O 2p-Cu 3d Hybridization

“…This difference is attributed to the introduction of Cu vacancies. Moreover, an upward energy shift observed across all peaks in Cu v -Cu 2 O, relative to pure Cu 2 O, indicates that Cu defects enhance the degree of electron deficiency in oxygen . Based on these observations, we hypothesize that Cu defects alter the chemical microenvironment of Cu and O in Cu 2 O, potentially stabilizing Cu + sites during CO 2 RR conditions.…”

“…Moreover, an upward energy shift observed across all peaks in Cu v -Cu 2 O, relative to pure Cu 2 O, indicates that Cu defects enhance the degree of electron deficiency in oxygen. 52 Based on these observations, we hypothesize that Cu defects alter the chemical microenvironment of Cu and O in Cu 2 O, potentially stabilizing Cu + sites during CO 2 RR conditions. Scanning electron microscopy (SEM) image (Figure 2e) reveals the cubic-phase morphology of the synthesized Cu v -Cu 2 O.…”

Layered double hydroxides‐based Z‐scheme heterojunction for photocatalysis

“…86 Overall, the positive shift and the negative shift of binding energy means the reduction and increase of electron density for the detected element, respectively. 87 Therefore, it is indispensable to investigate the shift of binding energy in XPS under light irradiation to research the process of electron transfer. For example, Shen et al 88 LDH, the increasing Co 2p, Ni 2p and Fe 2p binding energies and decreasing C 1s binding energy of g-C 3 N 4 / CoNiFe-LDH suggest electron migration from CoNiFe-LDH to g-C 3 N 4 , thereby reducing electron-hole recombination for improved photocatalytic activity in heterojunctions (as Figure 3A-D).…”

“…The modification of surface charge density for individual elements can be thoroughly analyzed through XPS characterization, with a focus on the peak shift in the corresponding element's binding energy in the XPS spectrum 86 . Overall, the positive shift and the negative shift of binding energy means the reduction and increase of electron density for the detected element, respectively 87 . Therefore, it is indispensable to investigate the shift of binding energy in XPS under light irradiation to research the process of electron transfer.…”

Sunlight-driven photocatalytic conversion of furfural and its derivatives

“…As listed in Table 8, Fan et al prepared a ZnNiFe-LDH (i.e., anionic compound of layered double hydroxides) catalyst by a coprecipitation method. 33 As shown in Fig. 11, LDHs can store CO 2 in the form of CO 3 2− layers based on the strong affinity of LDHs to CO 3 2− .…”