Copper adparticle enabled selective electrosynthesis of n-propanol

Abstract

The electrochemical reduction of carbon monoxide is a promising approach for the renewable production of carbon-based fuels and chemicals. Copper shows activity toward multi-carbon products from CO reduction, with reaction selectivity favoring two-carbon products; however, efficient conversion of CO to higher carbon products such as n-propanol, a liquid fuel, has yet to be achieved. We hypothesize that copper adparticles, possessing a high density of under-coordinated atoms, could serve as preferential sites for n-propanol formation. Density functional theory calculations suggest that copper adparticles increase CO binding energy and stabilize two-carbon intermediates, facilitating coupling between adsorbed *CO and two-carbon intermediates to form three-carbon products. We form adparticle-covered catalysts in-situ by mediating catalyst growth with strong CO chemisorption. The new catalysts exhibit an n-propanol Faradaic efficiency of 23% from CO reduction at an n-propanol partial current density of 11 mA cm−2.

Experimental Observation of the Gate-Controlled Reversal of the Anomalous Hall Effect in the Intrinsic Magnetic Topological Insulator MnBi2Te4 Device

“…The similar sign-reversal of  yx was observed in several other materials [25][26][27]. Focusing on this energy range, we obtain the band structure of 5SL MBT thin film and the intrinsic AHC  xy using the first-principles calculations, where the total magnetization is fixed as M Z > 0.…”

Oxygen induced promotion of electrochemical reduction of CO2 via co-electrolysis

“…1f). Unlike C 2 products, the formation rate of n-propanol does not show a drastic further enhancement as the O 2 ratio increases from 10 to 20%, suggesting its distinct chemistry in forming an additional carbon bond after their common rate-determining step of C-C coupling between two adsorbed CO molecules 29,31,32 . The oxygen induced enhancement of all C 2+ products is more pronounced at −0.80 V RHE ( Fig.…”

Transport in two-dimensional topological materials: recent developments in experiment and theory

“…Such nonmagnetic scatterings complicate the electronic structure and are detrimental to realizing the QHAE. Recently, Liu et al further showed that the AH resistance in (Bi 1−x Mn x ) 2 Se 3 thin film can have too components with different signs, and the surface component has a sign opposite to that of the QAH phases in Cr-or V-doped BST films [172]. Similar sign in the AH resistance was also observed in Mn-doped Bi 2 (Te 2 Se) 3 [168], Mn-doped Bi 2 Te 3 [173], and Crdoped Bi 2 Te 3 [174,175].…”