In:
Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 14, No. 9 ( 2021), p. 4998-5008
Kurzfassung:
The electrochemical CO 2 reduction reaction (CO 2 RR) to value-added and readily collectable liquid products is promising but remains a great challenge due to the lack of efficient and robust electrocatalysts. Herein, a self-supported large-size three-dimensional porous conductive network of bismuthene (Bi-ene-NW) as an efficient superstructured electrocatalytic membrane (ECM) has been pioneeringly assembled, in which the atomically thin Bi-ene with rich edge-site-involved defects is interconnected, highly exposing the active sites. Such ECM can be utilized as an ascendant catalytic cathode, displaying an unprecedented CO 2 RR performance with near-unity selectivity in a wide potential window and large current density for formate production. Remarkably, when integrated into a gas diffusion electrode (GDE) in a flow cell, Bi-ene-NW was capable of delivering industry-compatible current densities up to 560 mA cm −2 for formate production. Moreover, it was ultrastable to continuously operate for over 500 h at a high current density without significant activity decay. Such outstanding performance should be inseparable from its abundant accessible sites with high intrinsic activity, multiple interconnected channels and superior conductivity for mass/charge transport. The operando ATR-IR and theoretical calculations further deciphered that the rich defects in the roughened plane edges and in-plane pore edges of Bi-ene are conducive to the *OCHO intermediate stabilization.
Materialart:
Online-Ressource
ISSN:
1754-5692
,
1754-5706
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2021
ZDB Id:
2439879-2
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