Please use this identifier to cite or link to this item:
Title: Bimetallic MOF derived nickel nanoclusters supported by nitrogen-doped carbon for efficient electrocatalytic CO₂ reduction
Authors: Wang, Haojing
Wu, Xiaodong
Liu, Guanyu
Wu, Shuyang
Xu, Rong
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Wang, H., Wu, X., Liu, G., Wu, S. & Xu, R. (2022). Bimetallic MOF derived nickel nanoclusters supported by nitrogen-doped carbon for efficient electrocatalytic CO₂ reduction. Nano Research.
Journal: Nano Research
Abstract: Utilizing electrocatalytic CO2 reduction (ECR) to decrease the carbon footprint has been regarded as a promising pathway. Herein, we report the synthesis of Ni nanoclusters (NCs) of below 2 nm highly dispersed on N-doped carbon using a Ni/Zn bimetallic metal-organic framework (MOF) precursor. The size and the content of the Ni catalyst can be effectively controlled by varying the Ni:Zn ratio in MOF precursors. The −NH2 group in MOF ligand critically influences the size of Ni catalyst, as well as the property of the carbon substrate. At the optimum ratio of 1:150, Ni NCs with an average size of 1.9 nm anchored on pyridinic N-rich carbon were obtained after MOF pyrolysis. The resultant catalyst exhibits a high Faradaic efficiency for CO (FECO, 98.7%) and considerable partial current density for CO (JCO, −40.4 mA·cm−2) at −0.88 V versus reversible hydrogen electrode (RHE). Benefiting from the synergistic effect of small Ni clusters and their optimal interaction with the carbon support, the catalyst displays exceptional long-term stability. Density functional theory (DFT) calculations carried out for the three model structures confirm that Ni NCs anchored on N-doped carbon facilitate the easier formation of *COOH intermediate and faster electron transfer rate compared with the large-sized Ni particles represented by Ni(111) and the N-doped carbon without Ni.
ISSN: 1998-0124
DOI: 10.1007/s12274-022-4199-4
Rights: © 2022 Tsinghua University Press. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

Citations 50

Updated on Nov 27, 2022

Web of ScienceTM
Citations 50

Updated on Dec 1, 2022

Page view(s)

Updated on Dec 4, 2022

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.