Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162351
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. https://dx.doi.org/10.1007/s12274-022-4199-4
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.
URI: https://hdl.handle.net/10356/162351
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

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