Oxygen vacancy engineered unsaturated coordination in cobalt carbonate hydroxide nanowires enables highly selective photocatalytic CO₂ reduction

Abstract

The cobalt carbonate hydroxide nanowires (Co(CO3)0.5(OH)·0.11H2O, CCO NWs) have gained sufficient attention as promising catalyst, while its potential capability towards photocatalytic CO2 reduction (PCR) has not been excavated yet. Herein,...

Robust Porous WC‐Based Self‐Supported Ceramic Electrodes for High Current Density Hydrogen Evolution Reaction

“…Moreover, the positive slope of the Mott–Schottky plots for the WC‐N/W‐1200 sample indicates the n ‐type nature (Figure S7, Supporting Information). [ 29 ] The resultant Schottky barrier will obviously cause the redistribution of electrons at the interface between W and WC, and gradually enrich the positive charge on the metal W side. [ 1a,5,30 ] At high temperatures, a large amount of N atoms should be doped into the WC lattice, resulting in the formation of various types of defects, such as lattice distortion, vacancies, twin‐crystal, and edge dislocation structures, as shown in Figure 3b–e, respectively.…”

Fabrication of Flexible Mesoporous Black Nb2O5 Nanofiber Films for Visible‐Light‐Driven Photocatalytic CO2 Reduction into CH4

“…From the in situ infrared absorption spectra of the black catalyst in Figure 4h, the intensity of the peak gradually increased with the prolongation of the exposure time. Due to the co-permeation of CO 2 and H 2 O, the characteristic peaks at ≈1347 and 1350 cm −1 could be ascribed to CO 3 2− groups, [43] the peaks at ≈1683 and 1633 cm −1 were attributed to HCO 3 *, [44] and the peaks at ≈1550 and 1557 cm −1 were ascribed to COOH* group, [45] which were key intermediate products for the conversion of CO 2 to C1. Compared with the white Nb 2 O 5 (Figure S18a, Supporting Information), these COOH*, CO 3 2− and HCO 3 * peaks of the black Nb 2 O 5−x showed much higher intensities, further proving that the OVs was beneficial to the activation and reduction of CO 2 adsorption.…”

Replacing Ru complex with carbon dots over MOF-derived Co3O4/In2O3 catalyst for efficient solar-driven CO2 reduction

“…Photocatalytic conversion of CO 2 /H 2 O to hydrocarbon fuels is one of the most suitable methods to reduce carbon emissions and store solar energy in controllable chemical bonds. 1–3 The photocatalytic CO 2 reduction reaction suffers from poor activity and product selectivity, as a result of the complex multi-electron transfer path involved. 4–7 Considerable efforts have been made to enhance the photocatalytic CO 2 reduction activity, such as using photosensitizer and/or cocatalyst modification, 8 morphology engineering, 9 doping 10 and heterojunction construction.…”