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- Title
Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO<sub>2</sub> Reduction.
- Authors
Wang, Yutian; Hu, Hanjun; Sun, Yufan; Tang, Yang; Dai, Liming; Hu, Qing; Fisher, Adrian; Yang, Xiao Jin
- Abstract
Nanostructure and crystallinity of transition metals play an important role in catalyzing carbon dioxide electroreduction (CO2ER) where Cu is a typical electrocatalyst with a wide variety of products and Pb has a high overpotential for H2 evolution and is selective toward formic acid. In this study, 3D hierarchical nanostructures of Cu–Pb catalyst are prepared by a two‐step electrodepositing–annealing–electroreduction approach (EAE). Cu nanowires (Cu NWs) of 200–400 nm diameter are built on the surface of commercial nickel foam substrates through an EAE step. Then, Pb nanoparticles with diameter of 5–10 nm are uniformly created on the surface of Cu NWs by a second EAE step. The nanostructural Cu–Pb electrodes catalyze CO2ER at a current density of −9.35 mA cm−2 (at −0.93 V vs reversible hydrogen electrode (RHE)). The H2 evolution is suppressed by 35.6% and CO and HCOOH are enhanced by 29.6% and 9.2%, respectively, as compared with Cu NWs. The protocol proposed in this study provides a simple and straightforward approach for preparing high‐performance, hierarchical nanostructures of Cu–Pb bimetal catalyst for CO2ER. A two‐step electrodepositing‐annealing‐electroreduction approach is developed to synthesize 3‐dimensional hierarchical nanostructures of Cu‐Pb catalysts, which catalyze CO2 electroreduction in bicarbonate solutions at a current density of –9.35 mA cm–2 and faradaic efficiencies of 50.64% and 21.97% for CO and HCOOH. The protocol provides a straightforward approach for preparing high‐performance, hierarchical nanostructures of Cu‐Pb bimetal catalyst for CO2 electroreduction.
- Subjects
TRANSITION metals; ELECTROLYTIC reduction; CARBON dioxide reduction; COPPER compounds synthesis; ELECTROCATALYSTS; SYNTHESIS of nanowires; NANOSTRUCTURED materials synthesis; HYDROGEN evolution reactions
- Publication
Advanced Materials Interfaces, 2019, Vol 6, Issue 2, pN.PAG
- ISSN
2196-7350
- Publication type
Article
- DOI
10.1002/admi.201801200